Index: backend/src/main/java/medora/Medora5Application.java
===================================================================
--- backend/src/main/java/medora/Medora5Application.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/Medora5Application.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,13 @@
+package medora;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Medora5Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Medora5Application.class, args);
+    }
+
+}
Index: backend/src/main/java/medora/config/CorsFilter.java
===================================================================
--- backend/src/main/java/medora/config/CorsFilter.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/config/CorsFilter.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,38 @@
+package medora.config;
+
+import jakarta.servlet.*;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+
+@Component
+public class CorsFilter implements Filter {
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
+            throws IOException, ServletException {
+
+        HttpServletRequest httpRequest = (HttpServletRequest) request;
+        HttpServletResponse httpResponse = (HttpServletResponse) response;
+
+        // Add CORS headers
+        String origin = httpRequest.getHeader("Origin");
+        if (origin != null && (origin.equals("http://localhost:3000") || origin.equals("http://localhost:3001"))) {
+            httpResponse.setHeader("Access-Control-Allow-Origin", origin);
+        }
+        httpResponse.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS");
+        httpResponse.setHeader("Access-Control-Allow-Headers", "Content-Type, Authorization");
+        httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
+        httpResponse.setHeader("Access-Control-Max-Age", "3600");
+
+        // Handle preflight requests
+        if ("OPTIONS".equalsIgnoreCase(httpRequest.getMethod())) {
+            httpResponse.setStatus(HttpServletResponse.SC_OK);
+            return;
+        }
+
+        chain.doFilter(request, response);
+    }
+}
Index: backend/src/main/java/medora/config/SecurityConfig.java
===================================================================
--- backend/src/main/java/medora/config/SecurityConfig.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/config/SecurityConfig.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,23 @@
+package medora.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.web.SecurityFilterChain;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+        http
+            .csrf(csrf -> csrf.disable())
+            .authorizeHttpRequests(auth -> auth
+                .anyRequest().permitAll()
+            );
+
+        return http.build();
+    }
+}
Index: backend/src/main/java/medora/config/WebConfig.java
===================================================================
--- backend/src/main/java/medora/config/WebConfig.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/config/WebConfig.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+import java.nio.file.Path;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+
+    @Override
+    public void addResourceHandlers(ResourceHandlerRegistry registry) {
+        Path uploadPath = Path.of("uploads").toAbsolutePath().normalize();
+        registry
+            .addResourceHandler("/uploads/**")
+            .addResourceLocations(uploadPath.toUri().toString() + "/");
+    }
+
+    @Bean
+    public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
+        return builder
+                .featuresToDisable(SerializationFeature.FAIL_ON_EMPTY_BEANS)
+                .build();
+    }
+}
Index: backend/src/main/java/medora/exception/AdminNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/AdminNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/AdminNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class AdminNotFoundException extends RuntimeException {
+    public AdminNotFoundException(Long id) {
+        super("An admin with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/AllergiesNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/AllergiesNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/AllergiesNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class AllergiesNotFoundException extends RuntimeException {
+    public AllergiesNotFoundException(Long id) {
+        super("An allergy with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/AllergyPrescriptionRestrictionNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/AllergyPrescriptionRestrictionNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/AllergyPrescriptionRestrictionNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class AllergyPrescriptionRestrictionNotFoundException extends RuntimeException {
+    public AllergyPrescriptionRestrictionNotFoundException(Long allergyId, Long restrictionId) {
+        super("Allergy prescription restriction relationship with allergy id %d and restriction id %d does not exist.".formatted(allergyId, restrictionId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/AppointmentNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/AppointmentNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/AppointmentNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class AppointmentNotFoundException extends RuntimeException {
+    public AppointmentNotFoundException(Long id) {
+        super("An appointment with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/BillingLabTestsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/BillingLabTestsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/BillingLabTestsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class BillingLabTestsNotFoundException extends RuntimeException {
+    public BillingLabTestsNotFoundException(Long billingId, Long testId) {
+        super("Billing lab test relationship with billing id %d and test id %d does not exist.".formatted(billingId, testId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/BillingNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/BillingNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/BillingNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class BillingNotFoundException extends RuntimeException {
+    public BillingNotFoundException(Long id) {
+        super("A billing record with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/BillingProceduresNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/BillingProceduresNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/BillingProceduresNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class BillingProceduresNotFoundException extends RuntimeException {
+    public BillingProceduresNotFoundException(Long billingId, Long procedureId) {
+        super("Billing procedure relationship with billing id %d and procedure id %d does not exist.".formatted(billingId, procedureId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DepartmentsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DepartmentsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DepartmentsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DepartmentsNotFoundException extends RuntimeException {
+    public DepartmentsNotFoundException(Long id) {
+        super("A department with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DiagnosisNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DiagnosisNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DiagnosisNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DiagnosisNotFoundException extends RuntimeException {
+    public DiagnosisNotFoundException(Long id) {
+        super("A diagnosis with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DiagnosisProcedureNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DiagnosisProcedureNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DiagnosisProcedureNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DiagnosisProcedureNotFoundException extends RuntimeException {
+    public DiagnosisProcedureNotFoundException(Long diagnosisId, Long procedureId) {
+        super("Diagnosis procedure relationship with diagnosis id %d and procedure id %d does not exist.".formatted(diagnosisId, procedureId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DiagnosisSymptomsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DiagnosisSymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DiagnosisSymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DiagnosisSymptomsNotFoundException extends RuntimeException {
+    public DiagnosisSymptomsNotFoundException(Long diagnosisId, Long symptomId) {
+        super("Diagnosis symptom relationship with diagnosis id %d and symptom id %d does not exist.".formatted(diagnosisId, symptomId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DoctorLevelNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DoctorLevelNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DoctorLevelNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DoctorLevelNotFoundException extends RuntimeException {
+    public DoctorLevelNotFoundException(Long id) {
+        super("A doctor level with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DoctorMedicalRecordNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DoctorMedicalRecordNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DoctorMedicalRecordNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DoctorMedicalRecordNotFoundException extends RuntimeException {
+    public DoctorMedicalRecordNotFoundException(Long doctorId, Long recordId) {
+        super("Doctor medical record relationship with doctor id %d and record id %d does not exist.".formatted(doctorId, recordId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DoctorSpecializationNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DoctorSpecializationNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DoctorSpecializationNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DoctorSpecializationNotFoundException extends RuntimeException {
+    public DoctorSpecializationNotFoundException(Long id) {
+        super("A doctor specialization with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/DoctorsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/DoctorsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/DoctorsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class DoctorsNotFoundException extends RuntimeException {
+    public DoctorsNotFoundException(Long id) {
+        super("A doctor with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/LabResultsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/LabResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/LabResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class LabResultsNotFoundException extends RuntimeException {
+    public LabResultsNotFoundException(Long id) {
+        super("Lab results with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/LabTechnicianNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/LabTechnicianNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/LabTechnicianNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class LabTechnicianNotFoundException extends RuntimeException {
+    public LabTechnicianNotFoundException(Long id) {
+        super("A lab technician with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/LabTestsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/LabTestsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/LabTestsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class LabTestsNotFoundException extends RuntimeException {
+    public LabTestsNotFoundException(Long id) {
+        super("A lab test with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalRecordAllergiesNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalRecordAllergiesNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalRecordAllergiesNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalRecordAllergiesNotFoundException extends RuntimeException {
+    public MedicalRecordAllergiesNotFoundException(Long recordId, Long allergyId) {
+        super("Medical record allergy relationship with record id %d and allergy id %d does not exist.".formatted(recordId, allergyId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalRecordLabResultsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalRecordLabResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalRecordLabResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalRecordLabResultsNotFoundException extends RuntimeException {
+    public MedicalRecordLabResultsNotFoundException(Long recordId, Long resultId) {
+        super("Medical record lab result relationship with record id %d and result id %d does not exist.".formatted(recordId, resultId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalRecordNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalRecordNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalRecordNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalRecordNotFoundException extends RuntimeException {
+    public MedicalRecordNotFoundException(Long id) {
+        super("A medical record with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalRecordProceduresNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalRecordProceduresNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalRecordProceduresNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalRecordProceduresNotFoundException extends RuntimeException {
+    public MedicalRecordProceduresNotFoundException(Long recordId, Long procedureId) {
+        super("Medical record procedure relationship with record id %d and procedure id %d does not exist.".formatted(recordId, procedureId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalRecordSymptomsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalRecordSymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalRecordSymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalRecordSymptomsNotFoundException extends RuntimeException {
+    public MedicalRecordSymptomsNotFoundException(Long recordId, Long symptomId) {
+        super("Medical record symptom relationship with record id %d and symptom id %d does not exist.".formatted(recordId, symptomId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalReportLabResultsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalReportLabResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalReportLabResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalReportLabResultsNotFoundException extends RuntimeException {
+    public MedicalReportLabResultsNotFoundException(Long reportId, Long resultId) {
+        super("Medical report lab result relationship with report id %d and result id %d does not exist.".formatted(reportId, resultId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/MedicalReportNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/MedicalReportNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/MedicalReportNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class MedicalReportNotFoundException extends RuntimeException {
+    public MedicalReportNotFoundException(Long id) {
+        super("A medical report with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/PatientAllergyNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/PatientAllergyNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/PatientAllergyNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class PatientAllergyNotFoundException extends RuntimeException {
+    public PatientAllergyNotFoundException(Long patientId, Long allergyId) {
+        super("Patient allergy relationship with patient id %d and allergy id %d does not exist.".formatted(patientId, allergyId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/PatientNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/PatientNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/PatientNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class PatientNotFoundException extends RuntimeException {
+    public PatientNotFoundException(Long id) {
+        super("A patient with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/PatientSymptomsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/PatientSymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/PatientSymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class PatientSymptomsNotFoundException extends RuntimeException {
+    public PatientSymptomsNotFoundException(Long patientId, Long symptomId) {
+        super("Patient symptom relationship with patient id %d and symptom id %d does not exist.".formatted(patientId, symptomId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/PrescriptionMedicalRecordNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/PrescriptionMedicalRecordNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/PrescriptionMedicalRecordNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class PrescriptionMedicalRecordNotFoundException extends RuntimeException {
+    public PrescriptionMedicalRecordNotFoundException(Long prescriptionId, Long recordId) {
+        super("Prescription medical record relationship with prescription id %d and record id %d does not exist.".formatted(prescriptionId, recordId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/PrescriptionRestrictionNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/PrescriptionRestrictionNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/PrescriptionRestrictionNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class PrescriptionRestrictionNotFoundException extends RuntimeException {
+    public PrescriptionRestrictionNotFoundException(Long id) {
+        super("A prescription restriction with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/PrescriptionsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/PrescriptionsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/PrescriptionsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class PrescriptionsNotFoundException extends RuntimeException {
+    public PrescriptionsNotFoundException(Long id) {
+        super("A prescription with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/ProcedureNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/ProcedureNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/ProcedureNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class ProcedureNotFoundException extends RuntimeException {
+    public ProcedureNotFoundException(Long id) {
+        super("A procedure with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/ProcedureResultsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/ProcedureResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/ProcedureResultsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class ProcedureResultsNotFoundException extends RuntimeException {
+    public ProcedureResultsNotFoundException(Long id) {
+        super("Procedure results with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/ReferralsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/ReferralsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/ReferralsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class ReferralsNotFoundException extends RuntimeException {
+    public ReferralsNotFoundException(Long id) {
+        super("A referral with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/exception/SpecializationProcedureNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/SpecializationProcedureNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/SpecializationProcedureNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class SpecializationProcedureNotFoundException extends RuntimeException {
+    public SpecializationProcedureNotFoundException(Long specializationId, Long procedureId) {
+        super("Specialization procedure relationship with specialization id %d and procedure id %d does not exist.".formatted(specializationId, procedureId));
+    }
+}
+
Index: backend/src/main/java/medora/exception/SymptomsNotFoundException.java
===================================================================
--- backend/src/main/java/medora/exception/SymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/exception/SymptomsNotFoundException.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.exception;
+
+public class SymptomsNotFoundException extends RuntimeException {
+    public SymptomsNotFoundException(Long id) {
+        super("A symptom with id %d does not exist.".formatted(id));
+    }
+}
+
Index: backend/src/main/java/medora/models/converter/BloodTypeConverter.java
===================================================================
--- backend/src/main/java/medora/models/converter/BloodTypeConverter.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/converter/BloodTypeConverter.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,19 @@
+package medora.models.converter;
+
+import jakarta.persistence.AttributeConverter;
+import jakarta.persistence.Converter;
+import medora.models.enums.BloodType;
+
+@Converter(autoApply = true)
+public class BloodTypeConverter implements AttributeConverter<BloodType, String> {
+
+    @Override
+    public String convertToDatabaseColumn(BloodType attribute) {
+        return attribute == null ? null : attribute.getValue();
+    }
+
+    @Override
+    public BloodType convertToEntityAttribute(String dbData) {
+        return dbData == null ? null : BloodType.fromValue(dbData);
+    }
+}
Index: backend/src/main/java/medora/models/domain/Admin.java
===================================================================
--- backend/src/main/java/medora/models/domain/Admin.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Admin.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,44 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.validation.constraints.Pattern;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "admin")
+public class Admin {
+
+    @Id
+    @Column(name = "admin_id")
+    private Long adminId;
+
+    @Column(name = "username", nullable = false, unique = true)
+    private String username;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+
+    @Column(name = "lastname", nullable = false)
+    private String lastname;
+
+    @Pattern(regexp = ".*@adminmedora.*")
+    @Column(name = "email", nullable = false, unique = true)
+    private String email;
+
+    public Admin() {}
+
+    public Admin(Long adminId, String username, String name, String lastname, String email) {
+        this.adminId = adminId;
+        this.username = username;
+        this.name = name;
+        this.lastname = lastname;
+        this.email = email;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Allergies.java
===================================================================
--- backend/src/main/java/medora/models/domain/Allergies.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Allergies.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,36 @@
+package medora.models.domain;
+
+
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.enums.AllergySeverity;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "allergies")
+public class Allergies {
+
+    @Id
+    @Column(name = "allergy_id")
+    private Long allergyId;
+
+    @NotBlank
+    @Column(name = "name", nullable = false, unique = true)
+    private String name;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "allergy_severity", nullable = false)
+    private AllergySeverity allergySeverity;
+
+    public Allergies() {}
+
+    public Allergies(Long allergyId, String name, AllergySeverity allergySeverity) {
+        this.allergyId = allergyId;
+        this.name = name;
+        this.allergySeverity = allergySeverity;
+    }
+}
Index: backend/src/main/java/medora/models/domain/AllergyPrescriptionRestriction.java
===================================================================
--- backend/src/main/java/medora/models/domain/AllergyPrescriptionRestriction.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/AllergyPrescriptionRestriction.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,33 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.AllergyPrescriptionRestrictionId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "allergy_prescription_restrictions")
+@IdClass(AllergyPrescriptionRestrictionId.class)
+public class AllergyPrescriptionRestriction {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "allergy_id", nullable = false)
+    private Allergies allergy;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "restriction_id", nullable = false)
+    private PrescriptionRestriction restriction;
+
+    public AllergyPrescriptionRestriction() {}
+
+    public AllergyPrescriptionRestriction(Allergies allergy,
+                                          PrescriptionRestriction restriction) {
+        this.allergy = allergy;
+        this.restriction = restriction;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Appointment.java
===================================================================
--- backend/src/main/java/medora/models/domain/Appointment.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Appointment.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,57 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.enums.AppointmentStatus;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "appointments")
+public class Appointment {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "appointment_seq")
+    @SequenceGenerator(name = "appointment_seq", sequenceName = "appointment_id_seq", allocationSize = 1)
+    @Column(name = "appointment_id")
+    private Long appointmentId;
+
+    @Column(name = "appointment_date", nullable = false)
+    private LocalDate appointmentDate;
+
+    @Column(name = "appointment_time", nullable = false)
+    private LocalTime appointmentTime;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "status", nullable = false)
+    private AppointmentStatus status;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "doctor_id", nullable = false)
+    private Doctors doctor;
+
+    public Appointment() {}
+
+    public Appointment(Long appointmentId,
+                       LocalDate appointmentDate,
+                       LocalTime appointmentTime,
+                       AppointmentStatus status,
+                       Patient patient,
+                       Doctors doctor) {
+
+        this.appointmentId = appointmentId;
+        this.appointmentDate = appointmentDate;
+        this.appointmentTime = appointmentTime;
+        this.status = status;
+        this.patient = patient;
+        this.doctor = doctor;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Billing.java
===================================================================
--- backend/src/main/java/medora/models/domain/Billing.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Billing.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,60 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.DecimalMin;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.enums.PaymentStatus;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "billing")
+public class Billing {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "bill_seq")
+    @SequenceGenerator(name = "bill_seq", sequenceName = "bill_id_seq", allocationSize = 1)
+    @Column(name = "bill_id")
+    private Long billId;
+
+    @DecimalMin(value = "0.0")
+    @Column(name = "total_cost", nullable = false)
+    private BigDecimal totalCost;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "payment_status", nullable = false)
+    private PaymentStatus paymentStatus;
+
+    @Column(name = "payment_date")
+    private LocalDate paymentDate;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "admin_id", nullable = false)
+    private Admin admin;
+
+    public Billing() {}
+
+    public Billing(Long billId,
+                   BigDecimal totalCost,
+                   PaymentStatus paymentStatus,
+                   LocalDate paymentDate,
+                   MedicalRecord medicalRecord,
+                   Admin admin) {
+
+        this.billId = billId;
+        this.totalCost = totalCost;
+        this.paymentStatus = paymentStatus;
+        this.paymentDate = paymentDate;
+        this.medicalRecord = medicalRecord;
+        this.admin = admin;
+    }
+}
Index: backend/src/main/java/medora/models/domain/BillingLabTests.java
===================================================================
--- backend/src/main/java/medora/models/domain/BillingLabTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/BillingLabTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.BillingLabTestId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "billing_lab_tests")
+@IdClass(BillingLabTestId.class)
+public class BillingLabTests {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "bill_id", nullable = false)
+    private Billing billing;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "test_id", nullable = false)
+    private LabTests labTest;
+
+    public BillingLabTests() {
+    }
+
+    public BillingLabTests(Billing billing, LabTests labTest) {
+        this.billing = billing;
+        this.labTest = labTest;
+    }
+}
Index: backend/src/main/java/medora/models/domain/BillingProcedures.java
===================================================================
--- backend/src/main/java/medora/models/domain/BillingProcedures.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/BillingProcedures.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.BillingProcedureId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "billing_procedures")
+@IdClass(BillingProcedureId.class)
+public class BillingProcedures {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "bill_id", nullable = false)
+    private Billing billing;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    public BillingProcedures() {
+    }
+
+    public BillingProcedures(Billing billing, Procedure procedure) {
+        this.billing = billing;
+        this.procedure = procedure;
+    }
+}
Index: backend/src/main/java/medora/models/domain/DepartmentProcedure.java
===================================================================
--- backend/src/main/java/medora/models/domain/DepartmentProcedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/DepartmentProcedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.DepartmentProcedureId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "department_procedures")
+@IdClass(DepartmentProcedureId.class)
+public class DepartmentProcedure {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "department_id", nullable = false)
+    private Departments department;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    public DepartmentProcedure() {
+    }
+
+    public DepartmentProcedure(Departments department, Procedure procedure) {
+        this.department = department;
+        this.procedure = procedure;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Departments.java
===================================================================
--- backend/src/main/java/medora/models/domain/Departments.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Departments.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "departments")
+public class Departments {
+
+    @Id
+    @Column(name = "department_id")
+    private Long departmentId;
+
+    @Column(name = "department_name", nullable = false, unique = true)
+    private String departmentName;
+
+    public Departments() {}
+
+    public Departments(Long departmentId, String departmentName) {
+        this.departmentId = departmentId;
+        this.departmentName = departmentName;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Diagnosis.java
===================================================================
--- backend/src/main/java/medora/models/domain/Diagnosis.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Diagnosis.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,47 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "diagnosis")
+public class Diagnosis {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "diagnosis_seq")
+    @SequenceGenerator(name = "diagnosis_seq", sequenceName = "diagnosis_id_seq", allocationSize = 1)
+    @Column(name = "diagnosis_id")
+    private Long diagnosisId;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+
+    @Column(name = "description")
+    private String description;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "doctor_id", nullable = false)
+    private Doctors doctor;
+
+    public Diagnosis() {}
+
+    public Diagnosis(Long diagnosisId,
+                     String name,
+                     String description,
+                     Patient patient,
+                     Doctors doctor) {
+
+        this.diagnosisId = diagnosisId;
+        this.name = name;
+        this.description = description;
+        this.patient = patient;
+        this.doctor = doctor;
+    }
+}
Index: backend/src/main/java/medora/models/domain/DiagnosisProcedure.java
===================================================================
--- backend/src/main/java/medora/models/domain/DiagnosisProcedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/DiagnosisProcedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.DiagnosisProcedureId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "diagnosis_procedures")
+@IdClass(DiagnosisProcedureId.class)
+public class DiagnosisProcedure {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "diagnosis_id", nullable = false)
+    private Diagnosis diagnosis;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    public DiagnosisProcedure() {
+    }
+
+    public DiagnosisProcedure(Diagnosis diagnosis, Procedure procedure) {
+        this.diagnosis = diagnosis;
+        this.procedure = procedure;
+    }
+}
Index: backend/src/main/java/medora/models/domain/DiagnosisSymptoms.java
===================================================================
--- backend/src/main/java/medora/models/domain/DiagnosisSymptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/DiagnosisSymptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,33 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.DiagnosisSymptomId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "diagnosis_symptoms")
+@IdClass(DiagnosisSymptomId.class)
+public class DiagnosisSymptoms {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "diagnosis_id", nullable = false)
+    private Diagnosis diagnosis;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "symptom_id", nullable = false)
+    private Symptoms symptom;
+
+    public DiagnosisSymptoms() {
+    }
+
+    public DiagnosisSymptoms(Diagnosis diagnosis, Symptoms symptom) {
+        this.diagnosis = diagnosis;
+        this.symptom = symptom;
+    }
+}
Index: backend/src/main/java/medora/models/domain/DoctorLevel.java
===================================================================
--- backend/src/main/java/medora/models/domain/DoctorLevel.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/DoctorLevel.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "doctor_level")
+public class DoctorLevel {
+
+    @Id
+    @Column(name = "level_id")
+    private Long levelId;
+
+    @Column(nullable = false, unique = true)
+    private String level;
+
+    public DoctorLevel() {}
+
+    public DoctorLevel(Long levelId, String level) {
+        this.levelId = levelId;
+        this.level = level;
+    }
+}
Index: backend/src/main/java/medora/models/domain/DoctorMedicalRecord.java
===================================================================
--- backend/src/main/java/medora/models/domain/DoctorMedicalRecord.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/DoctorMedicalRecord.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.DoctorMedicalRecordId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "doctor_medical_records")
+@IdClass(DoctorMedicalRecordId.class)
+public class DoctorMedicalRecord {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "doctor_id", nullable = false)
+    private Doctors doctor;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    public DoctorMedicalRecord() {
+    }
+
+    public DoctorMedicalRecord(Doctors doctor, MedicalRecord medicalRecord) {
+        this.doctor = doctor;
+        this.medicalRecord = medicalRecord;
+    }
+}
Index: backend/src/main/java/medora/models/domain/DoctorSpecialization.java
===================================================================
--- backend/src/main/java/medora/models/domain/DoctorSpecialization.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/DoctorSpecialization.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "doctor_specialization")
+public class DoctorSpecialization {
+
+    @Id
+    @Column(name = "specialization_id")
+    private Long specializationId;
+
+    @Column(name = "specialization_name", nullable = false, unique = true)
+    private String specializationName;
+
+    public DoctorSpecialization() {}
+
+    public DoctorSpecialization(Long specializationId, String specializationName) {
+        this.specializationId = specializationId;
+        this.specializationName = specializationName;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Doctors.java
===================================================================
--- backend/src/main/java/medora/models/domain/Doctors.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Doctors.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,52 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "doctors")
+public class Doctors {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "doctor_seq")
+    @SequenceGenerator(name = "doctor_seq", sequenceName = "doctor_id_seq", allocationSize = 1)
+    @Column(name = "doctor_id")
+    private Long doctorId;
+
+    @Column(name = "first_name", nullable = false)
+    private String firstName;
+
+    @Column(name = "last_name", nullable = false)
+    private String lastName;
+
+    @Column(name = "email_address", nullable = false, unique = true)
+    private String emailAddress;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "level_id", nullable = false)
+    private DoctorLevel level;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "specialization_id", nullable = false)
+    private DoctorSpecialization specialization;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "department_id", nullable = false)
+    private Departments department;
+
+    public Doctors() {}
+
+    public Doctors(Long doctorId, String firstName, String lastName, String emailAddress,
+                  DoctorLevel level, DoctorSpecialization specialization, Departments department) {
+        this.doctorId = doctorId;
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.emailAddress = emailAddress;
+        this.level = level;
+        this.specialization = specialization;
+        this.department = department;
+    }
+}
Index: backend/src/main/java/medora/models/domain/LabResults.java
===================================================================
--- backend/src/main/java/medora/models/domain/LabResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/LabResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,45 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "lab_results")
+public class LabResults {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "result_seq")
+    @SequenceGenerator(name = "result_seq", sequenceName = "result_id_seq", allocationSize = 1)
+    @Column(name = "result_id")
+    private Long resultId;
+
+    @NotBlank
+    @Column(name = "results", nullable = false, columnDefinition = "TEXT")
+    private String results;
+
+    @Column(name = "result_date", nullable = false)
+    private LocalDate resultDate;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "test_id", nullable = false)
+    private LabTests labTest;
+
+    public LabResults() {}
+
+    public LabResults(Long resultId,
+                     String results,
+                     LocalDate resultDate,
+                     LabTests labTest) {
+
+        this.resultId = resultId;
+        this.results = results;
+        this.resultDate = resultDate;
+        this.labTest = labTest;
+    }
+}
Index: backend/src/main/java/medora/models/domain/LabTechnician.java
===================================================================
--- backend/src/main/java/medora/models/domain/LabTechnician.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/LabTechnician.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,44 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.validation.constraints.Pattern;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "lab_technician")
+public class LabTechnician {
+
+    @Id
+    @Column(name = "technician_id")
+    private Long technicianId;
+
+    @Column(name = "username", nullable = false, unique = true)
+    private String username;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+
+    @Column(name = "lastname", nullable = false)
+    private String lastname;
+
+    @Pattern(regexp = ".*@labmedora.*")
+    @Column(name = "email", nullable = false, unique = true)
+    private String email;
+
+    public LabTechnician() {}
+
+    public LabTechnician(Long technicianId, String username, String name, String lastname, String email) {
+        this.technicianId = technicianId;
+        this.username = username;
+        this.name = name;
+        this.lastname = lastname;
+        this.email = email;
+    }
+}
Index: backend/src/main/java/medora/models/domain/LabTests.java
===================================================================
--- backend/src/main/java/medora/models/domain/LabTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/LabTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,47 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.DecimalMin;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.math.BigDecimal;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "lab_tests")
+public class LabTests {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "test_seq")
+    @SequenceGenerator(name = "test_seq", sequenceName = "test_id_seq", allocationSize = 1)
+    @Column(name = "test_id")
+    private Long testId;
+
+    @NotBlank
+    @Column(name = "test_name", nullable = false)
+    private String testName;
+
+    @Column(name = "description")
+    private String description;
+
+    @DecimalMin(value = "0.0")
+    @Column(name = "cost", nullable = false)
+    private BigDecimal cost;
+
+    public LabTests() {}
+
+    public LabTests(Long testId,
+                   String testName,
+                   String description,
+                   BigDecimal cost) {
+
+        this.testId = testId;
+        this.testName = testName;
+        this.description = description;
+        this.cost = cost;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalRecord.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalRecord.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalRecord.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_records")
+public class MedicalRecord {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "record_seq")
+    @SequenceGenerator(name = "record_seq", sequenceName = "record_id_seq", allocationSize = 1)
+    @Column(name = "record_id")
+    private Long recordId;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    public MedicalRecord() {}
+
+    public MedicalRecord(Long recordId, Patient patient) {
+        this.recordId = recordId;
+        this.patient = patient;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalRecordAllergies.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalRecordAllergies.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalRecordAllergies.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,43 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.MedicalRecordAllergyId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_record_allergies")
+@IdClass(MedicalRecordAllergyId.class)
+public class MedicalRecordAllergies {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "allergy_id", nullable = false)
+    private Allergies allergy;
+
+    @Column(name = "reaction")
+    private String reaction;
+
+    @Column(name = "severity")
+    private String severity;
+
+    public MedicalRecordAllergies() {
+    }
+
+    public MedicalRecordAllergies(MedicalRecord medicalRecord,
+                                Allergies allergy,
+                                String reaction,
+                                String severity) {
+        this.medicalRecord = medicalRecord;
+        this.allergy = allergy;
+        this.reaction = reaction;
+        this.severity = severity;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalRecordLabResults.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalRecordLabResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalRecordLabResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.MedicalRecordLabResultId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_record_lab_results")
+@IdClass(MedicalRecordLabResultId.class)
+public class MedicalRecordLabResults {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "result_id", nullable = false)
+    private LabResults labResult;
+
+    public MedicalRecordLabResults() {
+    }
+
+    public MedicalRecordLabResults(MedicalRecord medicalRecord, LabResults labResult) {
+        this.medicalRecord = medicalRecord;
+        this.labResult = labResult;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalRecordProcedureResults.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalRecordProcedureResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalRecordProcedureResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.MedicalRecordProcedureResultId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_record_procedure_results")
+@IdClass(MedicalRecordProcedureResultId.class)
+public class MedicalRecordProcedureResults {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "result_id", nullable = false)
+    private ProcedureResults procedureResult;
+
+    public MedicalRecordProcedureResults() {
+    }
+
+    public MedicalRecordProcedureResults(MedicalRecord medicalRecord, ProcedureResults procedureResult) {
+        this.medicalRecord = medicalRecord;
+        this.procedureResult = procedureResult;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalRecordProcedures.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalRecordProcedures.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalRecordProcedures.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.MedicalRecordProcedureId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_record_procedures")
+@IdClass(MedicalRecordProcedureId.class)
+public class MedicalRecordProcedures {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    public MedicalRecordProcedures() {
+    }
+
+    public MedicalRecordProcedures(MedicalRecord medicalRecord, Procedure procedure) {
+        this.medicalRecord = medicalRecord;
+        this.procedure = procedure;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalRecordSymptoms.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalRecordSymptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalRecordSymptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,35 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.MedicalRecordSymptomId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_record_symptoms")
+@IdClass(MedicalRecordSymptomId.class)
+public class MedicalRecordSymptoms {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    private Symptoms symptom;
+
+    @Column(name = "severity")
+    private String severity;
+
+    public MedicalRecordSymptoms() {
+    }
+
+    public MedicalRecordSymptoms(MedicalRecord medicalRecord, Symptoms symptom, String severity) {
+        this.medicalRecord = medicalRecord;
+        this.symptom = symptom;
+        this.severity = severity;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalReport.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalReport.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalReport.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,51 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_report")
+public class MedicalReport {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "medical_report_seq")
+    @SequenceGenerator(name = "medical_report_seq", sequenceName = "medical_report_id_seq", initialValue = 100000, allocationSize = 1)
+    @Column(name = "report_id")
+    private Long reportId;
+
+    @NotBlank
+    @Column(name = "description", nullable = false, columnDefinition = "TEXT")
+    private String description;
+
+    @Column(name = "report_date", nullable = false)
+    private LocalDate reportDate;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "doctor_id", nullable = false)
+    private Doctors doctor;
+
+    public MedicalReport() {}
+
+    public MedicalReport(Long reportId,
+                         String description,
+                         LocalDate reportDate,
+                         MedicalRecord medicalRecord,
+                         Doctors doctor) {
+
+        this.reportId = reportId;
+        this.description = description;
+        this.reportDate = reportDate;
+        this.medicalRecord = medicalRecord;
+        this.doctor = doctor;
+    }
+}
Index: backend/src/main/java/medora/models/domain/MedicalReportLabResults.java
===================================================================
--- backend/src/main/java/medora/models/domain/MedicalReportLabResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/MedicalReportLabResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.MedicalReportLabResultId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "medical_report_lab_results")
+@IdClass(MedicalReportLabResultId.class)
+public class MedicalReportLabResults {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "report_id", nullable = false)
+    private MedicalReport medicalReport;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "result_id", nullable = false)
+    private LabResults labResult;
+
+    public MedicalReportLabResults() {
+    }
+
+    public MedicalReportLabResults(MedicalReport medicalReport, LabResults labResult) {
+        this.medicalReport = medicalReport;
+        this.labResult = labResult;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Patient.java
===================================================================
--- backend/src/main/java/medora/models/domain/Patient.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Patient.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,79 @@
+package medora.models.domain;
+
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.enums.BloodType;
+import medora.models.enums.Gender;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "patients")
+
+public class Patient {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "patient_seq")
+    @SequenceGenerator(name = "patient_seq", sequenceName = "patient_id_seq", allocationSize = 1)
+    @Column(name = "patient_id")
+    private Long patientId;
+
+    @Column(name = "first_name", nullable = false)
+    private String firstName;
+
+    @Column(name = "last_name", nullable = false)
+    private String lastName;
+
+    @Column(name = "email_address", unique = true)
+    private String emailAddress;
+
+    @Column(name = "date_of_birth", nullable = false)
+    private LocalDate dateOfBirth;
+
+    @Convert(converter = medora.models.converter.BloodTypeConverter.class)
+    @Column(name = "blood_type")
+    private BloodType bloodType;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "gender")
+    private Gender gender;
+
+    @Column(name = "phone_number")
+    private String phoneNumber;
+
+    @Column(name = "embg", nullable = false, unique = true)
+    private String embg;
+
+    @OneToMany(mappedBy = "patient", cascade = CascadeType.ALL, orphanRemoval = true)
+    @JsonIgnore
+    private List<MedicalRecord> medicalRecords;
+
+    public Patient() {}
+
+    public Patient(Long patientId,
+                   String firstName,
+                   String lastName,
+                   String emailAddress,
+                   LocalDate dateOfBirth,
+                   BloodType bloodType,
+                   Gender gender,
+                   String phoneNumber,
+                   String embg) {
+
+        this.patientId = patientId;
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.emailAddress = emailAddress;
+        this.dateOfBirth = dateOfBirth;
+        this.bloodType = bloodType;
+        this.gender = gender;
+        this.phoneNumber = phoneNumber;
+        this.embg = embg;
+    }
+}
Index: backend/src/main/java/medora/models/domain/PatientAllergy.java
===================================================================
--- backend/src/main/java/medora/models/domain/PatientAllergy.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/PatientAllergy.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.PatientAllergyId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "patient_allergies")
+@IdClass(PatientAllergyId.class)
+public class PatientAllergy {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "allergy_id", nullable = false)
+    private Allergies allergy;
+
+    public PatientAllergy() {}
+
+    public PatientAllergy(Patient patient, Allergies allergy) {
+        this.patient = patient;
+        this.allergy = allergy;
+    }
+}
Index: backend/src/main/java/medora/models/domain/PatientSymptoms.java
===================================================================
--- backend/src/main/java/medora/models/domain/PatientSymptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/PatientSymptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,31 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.PatientSymptomsId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "patient_symptoms")
+@IdClass(PatientSymptomsId.class)
+public class PatientSymptoms {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "symptom_id", nullable = false)
+    private Symptoms symptom;
+
+    public PatientSymptoms() {}
+
+    public PatientSymptoms(Patient patient, Symptoms symptom) {
+        this.patient = patient;
+        this.symptom = symptom;
+    }
+}
Index: backend/src/main/java/medora/models/domain/PerformedLabTests.java
===================================================================
--- backend/src/main/java/medora/models/domain/PerformedLabTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/PerformedLabTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,60 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "performed_lab_tests")
+public class PerformedLabTests {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "performed_test_seq")
+    @SequenceGenerator(name = "performed_test_seq", sequenceName = "performed_test_id_seq", allocationSize = 1)
+    @Column(name = "performed_test_id")
+    private Long performedTestId;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "test_id", nullable = false)
+    private LabTests labTest;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "doctor_id", nullable = false)
+    private Doctors doctor;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "technician_id")
+    private LabTechnician technician;
+
+    @Column(name = "test_date", nullable = false)
+    private LocalDate testDate;
+
+    private String notes;
+
+    public PerformedLabTests() {
+    }
+
+    public PerformedLabTests(Long performedTestId,
+                            LabTests labTest,
+                            Patient patient,
+                            Doctors doctor,
+                            LabTechnician technician,
+                            LocalDate testDate,
+                            String notes) {
+        this.performedTestId = performedTestId;
+        this.labTest = labTest;
+        this.patient = patient;
+        this.doctor = doctor;
+        this.technician = technician;
+        this.testDate = testDate;
+        this.notes = notes;
+    }
+}
Index: backend/src/main/java/medora/models/domain/PerformedProcedures.java
===================================================================
--- backend/src/main/java/medora/models/domain/PerformedProcedures.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/PerformedProcedures.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,60 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "performed_procedures")
+public class PerformedProcedures {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "performed_id_seq")
+    @SequenceGenerator(name = "performed_id_seq", sequenceName = "performed_procedures_performed_id_seq", allocationSize = 1)
+    @Column(name = "performed_id")
+    private Long performedId;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "doctor_id", nullable = false)
+    private Doctors doctor;
+
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "patient_id", nullable = false)
+    private Patient patient;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "diagnosis_id")
+    private Diagnosis diagnosis;
+
+    @Column(name = "procedure_date", nullable = false)
+    private LocalDate procedureDate;
+
+    private String notes;
+
+    public PerformedProcedures() {
+    }
+
+    public PerformedProcedures(Long performedId,
+                              Procedure procedure,
+                              Doctors doctor,
+                              Patient patient,
+                              Diagnosis diagnosis,
+                              LocalDate procedureDate,
+                              String notes) {
+        this.performedId = performedId;
+        this.procedure = procedure;
+        this.doctor = doctor;
+        this.patient = patient;
+        this.diagnosis = diagnosis;
+        this.procedureDate = procedureDate;
+        this.notes = notes;
+    }
+}
Index: backend/src/main/java/medora/models/domain/PrescriptionMedicalRecord.java
===================================================================
--- backend/src/main/java/medora/models/domain/PrescriptionMedicalRecord.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/PrescriptionMedicalRecord.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,52 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.PrescriptionMedicalRecordId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "prescription_medical_records")
+@IdClass(PrescriptionMedicalRecordId.class)
+public class PrescriptionMedicalRecord {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "prescription_id", nullable = false)
+    private Prescriptions prescription;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @Column(nullable = false)
+    private String dosage;
+
+    @Column(nullable = false)
+    private String frequency;
+
+    @Column(nullable = false)
+    private String duration;
+
+    private String notes;
+
+    public PrescriptionMedicalRecord() {
+    }
+
+    public PrescriptionMedicalRecord(Prescriptions prescription,
+                                     MedicalRecord medicalRecord,
+                                     String dosage,
+                                     String frequency,
+                                     String duration,
+                                     String notes) {
+        this.prescription = prescription;
+        this.medicalRecord = medicalRecord;
+        this.dosage = dosage;
+        this.frequency = frequency;
+        this.duration = duration;
+        this.notes = notes;
+    }
+}
Index: backend/src/main/java/medora/models/domain/PrescriptionRestriction.java
===================================================================
--- backend/src/main/java/medora/models/domain/PrescriptionRestriction.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/PrescriptionRestriction.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,35 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "prescription_restriction")
+public class PrescriptionRestriction {
+
+    @Id
+    @Column(name = "restriction_id")
+    private Long restrictionId;
+
+    @NotBlank
+    @Column(name = "description", nullable = false)
+    private String description;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "prescription_id", nullable = false)
+    private Prescriptions prescription;
+
+    public PrescriptionRestriction() {}
+
+    public PrescriptionRestriction(Long restrictionId,
+                                   String description,
+                                   Prescriptions prescription) {
+        this.restrictionId = restrictionId;
+        this.description = description;
+        this.prescription = prescription;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Prescriptions.java
===================================================================
--- backend/src/main/java/medora/models/domain/Prescriptions.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Prescriptions.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "prescriptions")
+public class Prescriptions {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "prescription_seq")
+    @SequenceGenerator(name = "prescription_seq", sequenceName = "prescription_id_seq", allocationSize = 1)
+    @Column(name = "prescription_id")
+    private Long prescriptionId;
+
+    @Column(name = "medication_name", nullable = false)
+    private String medicationName;
+
+    public Prescriptions() {}
+
+    public Prescriptions(Long prescriptionId, String medicationName) {
+        this.prescriptionId = prescriptionId;
+        this.medicationName = medicationName;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Procedure.java
===================================================================
--- backend/src/main/java/medora/models/domain/Procedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Procedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,46 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.DecimalMin;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.math.BigDecimal;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "procedures")
+public class Procedure {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "procedure_seq")
+    @SequenceGenerator(name = "procedure_seq", sequenceName = "procedure_id_seq", allocationSize = 1)
+    @Column(name = "procedure_id")
+    private Long procedureId;
+
+    @NotBlank
+    @Column(name = "procedure_type", nullable = false)
+    private String procedureType;
+
+    @Column(name = "description", columnDefinition = "TEXT")
+    private String description;
+
+    @DecimalMin(value = "0.0")
+    @Column(name = "cost", nullable = false)
+    private BigDecimal cost;
+
+    public Procedure() {}
+
+    public Procedure(Long procedureId,
+                     String procedureType,
+                     String description,
+                     BigDecimal cost) {
+
+        this.procedureId = procedureId;
+        this.procedureType = procedureType;
+        this.description = description;
+        this.cost = cost;
+    }
+}
Index: backend/src/main/java/medora/models/domain/ProcedureResults.java
===================================================================
--- backend/src/main/java/medora/models/domain/ProcedureResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/ProcedureResults.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,44 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "procedure_results")
+public class ProcedureResults {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "result_seq")
+    @SequenceGenerator(name = "result_seq", sequenceName = "procedure_results_result_id_seq", allocationSize = 1)
+    @Column(name = "result_id")
+    private Long resultId;
+
+    @Column(name = "result_description")
+    private String resultDescription;
+
+    @Column(name = "result_date", nullable = false)
+    private LocalDate resultDate;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    public ProcedureResults() {}
+
+    public ProcedureResults(Long resultId,
+                           String resultDescription,
+                           LocalDate resultDate,
+                           Procedure procedure) {
+
+        this.resultId = resultId;
+        this.resultDescription = resultDescription;
+        this.resultDate = resultDate;
+        this.procedure = procedure;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Referrals.java
===================================================================
--- backend/src/main/java/medora/models/domain/Referrals.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Referrals.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,58 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDate;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "referrals")
+public class Referrals {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "referral_seq")
+    @SequenceGenerator(name = "referral_seq", sequenceName = "referral_id_seq", allocationSize = 1)
+    @Column(name = "referral_id")
+    private Long referralId;
+
+    @NotBlank
+    @Column(name = "reason", nullable = false)
+    private String reason;
+
+    @Column(name = "referral_date", nullable = false)
+    private LocalDate referralDate;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "record_id", nullable = false)
+    private MedicalRecord medicalRecord;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "from_doctor_id", nullable = false)
+    private Doctors fromDoctor;
+
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "to_doctor_id", nullable = false)
+    private Doctors toDoctor;
+
+    public Referrals() {}
+
+    public Referrals(Long referralId,
+                    String reason,
+                    LocalDate referralDate,
+                    MedicalRecord medicalRecord,
+                    Doctors fromDoctor,
+                    Doctors toDoctor) {
+
+        this.referralId = referralId;
+        this.reason = reason;
+        this.referralDate = referralDate;
+        this.medicalRecord = medicalRecord;
+        this.fromDoctor = fromDoctor;
+        this.toDoctor = toDoctor;
+    }
+}
Index: backend/src/main/java/medora/models/domain/ReportAllergy.java
===================================================================
--- backend/src/main/java/medora/models/domain/ReportAllergy.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/ReportAllergy.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "report_allergy")
+@IdClass(medora.models.domain.id.ReportAllergyId.class)
+public class ReportAllergy {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "report_id", nullable = false)
+    private MedicalReport report;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "allergy_id", nullable = false)
+    private Allergies allergy;
+
+    public ReportAllergy() {}
+
+    public ReportAllergy(MedicalReport report, Allergies allergy) {
+        this.report = report;
+        this.allergy = allergy;
+    }
+}
Index: backend/src/main/java/medora/models/domain/ReportDiagnosis.java
===================================================================
--- backend/src/main/java/medora/models/domain/ReportDiagnosis.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/ReportDiagnosis.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "report_diagnosis")
+@IdClass(medora.models.domain.id.ReportDiagnosisId.class)
+public class ReportDiagnosis {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "report_id", nullable = false)
+    private MedicalReport report;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "diagnosis_id", nullable = false)
+    private Diagnosis diagnosis;
+
+    public ReportDiagnosis() {}
+
+    public ReportDiagnosis(MedicalReport report, Diagnosis diagnosis) {
+        this.report = report;
+        this.diagnosis = diagnosis;
+    }
+}
Index: backend/src/main/java/medora/models/domain/ReportPrescription.java
===================================================================
--- backend/src/main/java/medora/models/domain/ReportPrescription.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/ReportPrescription.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "report_prescription")
+@IdClass(medora.models.domain.id.ReportPrescriptionId.class)
+public class ReportPrescription {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "report_id", nullable = false)
+    private MedicalReport report;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "prescription_id", nullable = false)
+    private Prescriptions prescription;
+
+    public ReportPrescription() {}
+
+    public ReportPrescription(MedicalReport report, Prescriptions prescription) {
+        this.report = report;
+        this.prescription = prescription;
+    }
+}
Index: backend/src/main/java/medora/models/domain/ReportSymptom.java
===================================================================
--- backend/src/main/java/medora/models/domain/ReportSymptom.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/ReportSymptom.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.models.domain;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "report_symptom")
+@IdClass(medora.models.domain.id.ReportSymptomId.class)
+public class ReportSymptom {
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "report_id", nullable = false)
+    private MedicalReport report;
+
+    @Id
+    @ManyToOne(optional = false)
+    @JoinColumn(name = "symptom_id", nullable = false)
+    private Symptoms symptom;
+
+    public ReportSymptom() {}
+
+    public ReportSymptom(MedicalReport report, Symptoms symptom) {
+        this.report = report;
+        this.symptom = symptom;
+    }
+}
Index: backend/src/main/java/medora/models/domain/SpecializationProcedure.java
===================================================================
--- backend/src/main/java/medora/models/domain/SpecializationProcedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/SpecializationProcedure.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,33 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import medora.models.domain.id.SpecializationProcedureId;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "specialization_procedures")
+@IdClass(SpecializationProcedureId.class)
+public class SpecializationProcedure {
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "specialization_id", nullable = false)
+    private DoctorSpecialization specialization;
+
+    @Id
+    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @JoinColumn(name = "procedure_id", nullable = false)
+    private Procedure procedure;
+
+    public SpecializationProcedure() {
+    }
+
+    public SpecializationProcedure(DoctorSpecialization specialization, Procedure procedure) {
+        this.specialization = specialization;
+        this.procedure = procedure;
+    }
+}
Index: backend/src/main/java/medora/models/domain/Symptoms.java
===================================================================
--- backend/src/main/java/medora/models/domain/Symptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/Symptoms.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,36 @@
+package medora.models.domain;
+
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "symptoms")
+public class Symptoms {
+
+    @Id
+    @Column(name = "symptom_id")
+    private Long symptomId;
+
+    @NotBlank
+    @Column(name = "name", nullable = false, unique = true)
+    private String name;
+
+    @Column(name = "description")
+    private String description;
+
+    public Symptoms() {}
+
+    public Symptoms(Long symptomId, String name, String description) {
+        this.symptomId = symptomId;
+        this.name = name;
+        this.description = description;
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/AllergyPrescriptionRestrictionId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/AllergyPrescriptionRestrictionId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/AllergyPrescriptionRestrictionId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,31 @@
+package medora.models.domain.id;
+
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class AllergyPrescriptionRestrictionId implements Serializable {
+
+    private Long allergy;
+    private Long restriction;
+
+    public AllergyPrescriptionRestrictionId() {}
+
+    public AllergyPrescriptionRestrictionId(Long allergy, Long restriction) {
+        this.allergy = allergy;
+        this.restriction = restriction;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof AllergyPrescriptionRestrictionId that)) return false;
+        return Objects.equals(allergy, that.allergy)
+                && Objects.equals(restriction, that.restriction);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(allergy, restriction);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/BillingLabTestId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/BillingLabTestId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/BillingLabTestId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class BillingLabTestId implements Serializable {
+
+    private Long billing;
+    private Long labTest;
+
+    public BillingLabTestId() {
+    }
+
+    public BillingLabTestId(Long billing, Long labTest) {
+        this.billing = billing;
+        this.labTest = labTest;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof BillingLabTestId that)) return false;
+
+        return Objects.equals(billing, that.billing)
+                && Objects.equals(labTest, that.labTest);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(billing, labTest);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/BillingProcedureId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/BillingProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/BillingProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class BillingProcedureId implements Serializable {
+
+    private Long billing;
+    private Long procedure;
+
+    public BillingProcedureId() {
+    }
+
+    public BillingProcedureId(Long billing, Long procedure) {
+        this.billing = billing;
+        this.procedure = procedure;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof BillingProcedureId that)) return false;
+
+        return Objects.equals(billing, that.billing)
+                && Objects.equals(procedure, that.procedure);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(billing, procedure);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/DepartmentProcedureId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/DepartmentProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/DepartmentProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class DepartmentProcedureId implements Serializable {
+
+    private Long department;
+    private Long procedure;
+
+    public DepartmentProcedureId() {
+    }
+
+    public DepartmentProcedureId(Long department, Long procedure) {
+        this.department = department;
+        this.procedure = procedure;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof DepartmentProcedureId that)) return false;
+
+        return Objects.equals(department, that.department)
+                && Objects.equals(procedure, that.procedure);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(department, procedure);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/DiagnosisProcedureId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/DiagnosisProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/DiagnosisProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class DiagnosisProcedureId implements Serializable {
+
+    private Long diagnosis;
+    private Long procedure;
+
+    public DiagnosisProcedureId() {
+    }
+
+    public DiagnosisProcedureId(Long diagnosis, Long procedure) {
+        this.diagnosis = diagnosis;
+        this.procedure = procedure;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof DiagnosisProcedureId that)) return false;
+
+        return Objects.equals(diagnosis, that.diagnosis)
+                && Objects.equals(procedure, that.procedure);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(diagnosis, procedure);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/DiagnosisSymptomId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/DiagnosisSymptomId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/DiagnosisSymptomId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,31 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class DiagnosisSymptomId implements Serializable {
+
+    private Long diagnosis;
+    private Long symptom;
+
+    public DiagnosisSymptomId() {
+    }
+
+    public DiagnosisSymptomId(Long diagnosis, Long symptom) {
+        this.diagnosis = diagnosis;
+        this.symptom = symptom;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof DiagnosisSymptomId that)) return false;
+        return Objects.equals(diagnosis, that.diagnosis)
+                && Objects.equals(symptom, that.symptom);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(diagnosis, symptom);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/DoctorMedicalRecordId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/DoctorMedicalRecordId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/DoctorMedicalRecordId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class DoctorMedicalRecordId implements Serializable {
+
+    private Long doctor;
+    private Long medicalRecord;
+
+    public DoctorMedicalRecordId() {
+    }
+
+    public DoctorMedicalRecordId(Long doctor, Long medicalRecord) {
+        this.doctor = doctor;
+        this.medicalRecord = medicalRecord;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof DoctorMedicalRecordId that)) return false;
+
+        return Objects.equals(doctor, that.doctor)
+                && Objects.equals(medicalRecord, that.medicalRecord);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(doctor, medicalRecord);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/MedicalRecordAllergyId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/MedicalRecordAllergyId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/MedicalRecordAllergyId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class MedicalRecordAllergyId implements Serializable {
+
+    private Long medicalRecord;
+    private Long allergy;
+
+    public MedicalRecordAllergyId() {
+    }
+
+    public MedicalRecordAllergyId(Long medicalRecord, Long allergy) {
+        this.medicalRecord = medicalRecord;
+        this.allergy = allergy;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof MedicalRecordAllergyId that)) return false;
+
+        return Objects.equals(medicalRecord, that.medicalRecord)
+                && Objects.equals(allergy, that.allergy);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(medicalRecord, allergy);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/MedicalRecordLabResultId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/MedicalRecordLabResultId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/MedicalRecordLabResultId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class MedicalRecordLabResultId implements Serializable {
+
+    private Long medicalRecord;
+    private Long labResult;
+
+    public MedicalRecordLabResultId() {
+    }
+
+    public MedicalRecordLabResultId(Long medicalRecord, Long labResult) {
+        this.medicalRecord = medicalRecord;
+        this.labResult = labResult;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof MedicalRecordLabResultId that)) return false;
+
+        return Objects.equals(medicalRecord, that.medicalRecord)
+                && Objects.equals(labResult, that.labResult);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(medicalRecord, labResult);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/MedicalRecordProcedureId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/MedicalRecordProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/MedicalRecordProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class MedicalRecordProcedureId implements Serializable {
+
+    private Long medicalRecord;
+    private Long procedure;
+
+    public MedicalRecordProcedureId() {
+    }
+
+    public MedicalRecordProcedureId(Long medicalRecord, Long procedure) {
+        this.medicalRecord = medicalRecord;
+        this.procedure = procedure;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof MedicalRecordProcedureId that)) return false;
+
+        return Objects.equals(medicalRecord, that.medicalRecord)
+                && Objects.equals(procedure, that.procedure);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(medicalRecord, procedure);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/MedicalRecordProcedureResultId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/MedicalRecordProcedureResultId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/MedicalRecordProcedureResultId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class MedicalRecordProcedureResultId implements Serializable {
+
+    private Long medicalRecord;
+    private Long procedureResult;
+
+    public MedicalRecordProcedureResultId() {
+    }
+
+    public MedicalRecordProcedureResultId(Long medicalRecord, Long procedureResult) {
+        this.medicalRecord = medicalRecord;
+        this.procedureResult = procedureResult;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof MedicalRecordProcedureResultId that)) return false;
+
+        return Objects.equals(medicalRecord, that.medicalRecord)
+                && Objects.equals(procedureResult, that.procedureResult);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(medicalRecord, procedureResult);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/MedicalRecordSymptomId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/MedicalRecordSymptomId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/MedicalRecordSymptomId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class MedicalRecordSymptomId implements Serializable {
+
+    private Long medicalRecord;
+    private Long symptom;
+
+    public MedicalRecordSymptomId() {
+    }
+
+    public MedicalRecordSymptomId(Long medicalRecord, Long symptom) {
+        this.medicalRecord = medicalRecord;
+        this.symptom = symptom;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof MedicalRecordSymptomId that)) return false;
+
+        return Objects.equals(medicalRecord, that.medicalRecord)
+                && Objects.equals(symptom, that.symptom);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(medicalRecord, symptom);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/MedicalReportLabResultId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/MedicalReportLabResultId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/MedicalReportLabResultId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class MedicalReportLabResultId implements Serializable {
+
+    private Long medicalReport;
+    private Long labResult;
+
+    public MedicalReportLabResultId() {
+    }
+
+    public MedicalReportLabResultId(Long medicalReport, Long labResult) {
+        this.medicalReport = medicalReport;
+        this.labResult = labResult;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof MedicalReportLabResultId that)) return false;
+
+        return Objects.equals(medicalReport, that.medicalReport)
+                && Objects.equals(labResult, that.labResult);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(medicalReport, labResult);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/PatientAllergyId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/PatientAllergyId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/PatientAllergyId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,31 @@
+package medora.models.domain.id;
+
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class PatientAllergyId implements Serializable {
+
+    private Long patient;
+    private Long allergy;
+
+    public PatientAllergyId() {}
+
+    public PatientAllergyId(Long patient, Long allergy) {
+        this.patient = patient;
+        this.allergy = allergy;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof PatientAllergyId that)) return false;
+        return Objects.equals(patient, that.patient)
+                && Objects.equals(allergy, that.allergy);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(patient, allergy);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/PatientSymptomsId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/PatientSymptomsId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/PatientSymptomsId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,30 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class PatientSymptomsId implements Serializable {
+
+    private Long patient;
+    private Long symptom;
+
+    public PatientSymptomsId() {}
+
+    public PatientSymptomsId(Long patient, Long symptom) {
+        this.patient = patient;
+        this.symptom = symptom;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof PatientSymptomsId that)) return false;
+        return Objects.equals(patient, that.patient)
+                && Objects.equals(symptom, that.symptom);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(patient, symptom);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/PrescriptionMedicalRecordId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/PrescriptionMedicalRecordId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/PrescriptionMedicalRecordId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,32 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class PrescriptionMedicalRecordId implements Serializable {
+
+    private Long prescription;
+    private Long medicalRecord;
+
+    public PrescriptionMedicalRecordId() {
+    }
+
+    public PrescriptionMedicalRecordId(Long prescription, Long medicalRecord) {
+        this.prescription = prescription;
+        this.medicalRecord = medicalRecord;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof PrescriptionMedicalRecordId that)) return false;
+
+        return Objects.equals(prescription, that.prescription)
+                && Objects.equals(medicalRecord, that.medicalRecord);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(prescription, medicalRecord);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/ReportAllergyId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/ReportAllergyId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/ReportAllergyId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class ReportAllergyId implements Serializable {
+    private Long report;
+    private Long allergy;
+
+    public ReportAllergyId() {}
+
+    public ReportAllergyId(Long report, Long allergy) {
+        this.report = report;
+        this.allergy = allergy;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ReportAllergyId that = (ReportAllergyId) o;
+        return Objects.equals(report, that.report) && Objects.equals(allergy, that.allergy);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(report, allergy);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/ReportDiagnosisId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/ReportDiagnosisId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/ReportDiagnosisId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class ReportDiagnosisId implements Serializable {
+    private Long report;
+    private Long diagnosis;
+
+    public ReportDiagnosisId() {}
+
+    public ReportDiagnosisId(Long report, Long diagnosis) {
+        this.report = report;
+        this.diagnosis = diagnosis;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ReportDiagnosisId that = (ReportDiagnosisId) o;
+        return Objects.equals(report, that.report) && Objects.equals(diagnosis, that.diagnosis);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(report, diagnosis);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/ReportPrescriptionId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/ReportPrescriptionId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/ReportPrescriptionId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class ReportPrescriptionId implements Serializable {
+    private Long report;
+    private Long prescription;
+
+    public ReportPrescriptionId() {}
+
+    public ReportPrescriptionId(Long report, Long prescription) {
+        this.report = report;
+        this.prescription = prescription;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ReportPrescriptionId that = (ReportPrescriptionId) o;
+        return Objects.equals(report, that.report) && Objects.equals(prescription, that.prescription);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(report, prescription);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/ReportSymptomId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/ReportSymptomId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/ReportSymptomId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,29 @@
+package medora.models.domain.id;
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class ReportSymptomId implements Serializable {
+    private Long report;
+    private Long symptom;
+
+    public ReportSymptomId() {}
+
+    public ReportSymptomId(Long report, Long symptom) {
+        this.report = report;
+        this.symptom = symptom;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ReportSymptomId that = (ReportSymptomId) o;
+        return Objects.equals(report, that.report) && Objects.equals(symptom, that.symptom);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(report, symptom);
+    }
+}
Index: backend/src/main/java/medora/models/domain/id/SpecializationProcedureId.java
===================================================================
--- backend/src/main/java/medora/models/domain/id/SpecializationProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/domain/id/SpecializationProcedureId.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,34 @@
+package medora.models.domain.id;
+
+
+
+import java.io.Serializable;
+import java.util.Objects;
+
+public class SpecializationProcedureId implements Serializable {
+
+    private Long specialization;
+    private Long procedure;
+
+    public SpecializationProcedureId() {
+    }
+
+    public SpecializationProcedureId(Long specialization, Long procedure) {
+        this.specialization = specialization;
+        this.procedure = procedure;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof SpecializationProcedureId that)) return false;
+
+        return Objects.equals(specialization, that.specialization)
+                && Objects.equals(procedure, that.procedure);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(specialization, procedure);
+    }
+}
Index: backend/src/main/java/medora/models/enums/AllergySeverity.java
===================================================================
--- backend/src/main/java/medora/models/enums/AllergySeverity.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/enums/AllergySeverity.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.models.enums;
+
+public enum AllergySeverity {
+    LOW,
+    MEDIUM,
+    HIGH,
+    CRITICAL
+}
Index: backend/src/main/java/medora/models/enums/AppointmentStatus.java
===================================================================
--- backend/src/main/java/medora/models/enums/AppointmentStatus.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/enums/AppointmentStatus.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,8 @@
+package medora.models.enums;
+
+public enum AppointmentStatus {
+    SCHEDULED,
+    COMPLETED,
+    CANCELLED,
+    IN_PROGRESS
+}
Index: backend/src/main/java/medora/models/enums/BloodType.java
===================================================================
--- backend/src/main/java/medora/models/enums/BloodType.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/enums/BloodType.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,31 @@
+package medora.models.enums;
+
+public enum BloodType {
+    A_POS("A+"),
+    A_NEG("A-"),
+    B_POS("B+"),
+    B_NEG("B-"),
+    AB_POS("AB+"),
+    AB_NEG("AB-"),
+    O_POS("O+"),
+    O_NEG("O-");
+
+    private final String value;
+
+    BloodType(String value) {
+        this.value = value;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public static BloodType fromValue(String value) {
+        for (BloodType b : values()) {
+            if (b.value.equals(value)) {
+                return b;
+            }
+        }
+        throw new IllegalArgumentException("Invalid blood type: " + value);
+    }
+}
Index: backend/src/main/java/medora/models/enums/Gender.java
===================================================================
--- backend/src/main/java/medora/models/enums/Gender.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/enums/Gender.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,6 @@
+package medora.models.enums;
+
+public enum Gender {
+    MALE,
+    FEMALE
+}
Index: backend/src/main/java/medora/models/enums/PaymentStatus.java
===================================================================
--- backend/src/main/java/medora/models/enums/PaymentStatus.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/java/medora/models/enums/PaymentStatus.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,7 @@
+package medora.models.enums;
+
+public enum PaymentStatus {
+    PENDING,
+    PAID,
+    CANCELLED
+}
Index: backend/src/main/resources/application.properties
===================================================================
--- backend/src/main/resources/application.properties	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/main/resources/application.properties	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,20 @@
+spring.application.name=medora
+
+# Spring Security - Development credentials
+spring.security.user.name=admin
+spring.security.user.password=admin123
+
+spring.datasource.url=jdbc:postgresql://localhost:5432/medora
+spring.datasource.username=postgres
+spring.datasource.password=postgres
+spring.datasource.driver-class-name=org.postgresql.Driver
+
+# JPA / Hibernate settings
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.format_sql=true
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+
+# Jackson serialization settings
+spring.jackson.serialization.fail-on-empty-beans=false
+spring.jackson.default-property-inclusion=non_null
Index: backend/src/test/java/medora/Medora5ApplicationTests.java
===================================================================
--- backend/src/test/java/medora/Medora5ApplicationTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
+++ backend/src/test/java/medora/Medora5ApplicationTests.java	(revision c613cbf6f9fd9bd8bfca2ae505ed47ced972227a)
@@ -0,0 +1,13 @@
+package medora;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Medora5ApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}
