EHR App

An electronic health records application built with a modern stack:

• Frontend: Next.js 14+ with TypeScript and React Context

• Backend: Spring Boot 3.5.0 with Kotlin 1.9.25

• Clinical Data: HAPI FHIR R4 Server (v7.6.0)

• Lookup Data: PostgreSQL 15

Clinical records (patients, encounters, notes, diagnoses, procedures) are stored as FHIR R4 resources. Reference data (users, ICD-10 codes, CPT codes) lives in Postgres. A mapping table bridges frontend integer IDs to FHIR server UUIDs.

• Architecture
  • System Overview
  • Data Store Responsibilities
  • Backend (Spring Boot + Kotlin)
  • Frontend (Next.js + TypeScript)
  • Docker Compose Services
• FHIR Integration
  • FHIR R4 Resources
  • Mapper Objects
  • FhirIdMapping Bridge
  • Data Flow Example: Create Patient
  • FHIR Search Indexing Delay
• API Reference
  • Patients
  • Encounters
  • Notes
  • Users
  • ICD-10 Codes
  • CPT Codes