Technical Architecture
Enterprise-Grade Healthcare Interoperability Platform
FHIR R4 Native | Microservices | Cloud Native | HIPAA Compliant
System Architecture
API Gateway Layer
- • Kong API Gateway (Port 8000)
- • JWT Authentication
- • Rate Limiting & Throttling
- • Request/Response Logging
28 Microservices
- • Quality Measure Service
- • CQL Engine Service
- • FHIR Service
- • Patient Service
- • Care Gap Service
- • Analytics Service
- • + 22 more...
Data Layer
- • PostgreSQL 15 (Primary)
- • Redis 7 (Caching)
- • Kafka 3.x (Event Stream)
- • HIPAA-Compliant Multi-tenancy
Core Services
Quality Measure Service
:8087HEDIS quality measure evaluation engine supporting 100+ measures
Stack: Spring Boot 3.x, HAPI FHIR 7.x
API: /quality-measure
CQL Engine Service
:8081Clinical Quality Language (CQL) expression evaluation
Stack: FHIR CQL Engine, Spring Boot 3.x
API: /cql-engine
FHIR Service
:8085FHIR R4 resource management and validation
Stack: HAPI FHIR 7.x Server
API: /fhir
Patient Service
:8084Patient data aggregation and deduplication (MPI)
Stack: Spring Boot 3.x, PostgreSQL
API: /patient
Care Gap Service
:8086Predictive care gap detection and recommendations
Stack: Spring Boot 3.x, ML Pipeline
API: /care-gap
Analytics Service
:8088Quality reporting, dashboards, and business intelligence
Stack: Spring Boot 3.x, Elasticsearch
API: /analytics
Technology Stack
Backend
- •Java 21 (LTS)
- •Spring Boot 3.x
- •Spring Security
- •Spring Data JPA
Healthcare Standards
- •HAPI FHIR 7.x
- •FHIR R4
- •Clinical Quality Language (CQL)
- •HL7 Messaging
Data & Messaging
- •PostgreSQL 15
- •Redis 7
- •Apache Kafka 3.x
- •Liquibase Migrations
Infrastructure
- •Docker & Compose
- •Kubernetes (optional)
- •Kong API Gateway
- •Prometheus + Grafana
Frontend
- •Angular 17+
- •Next.js 15
- •TypeScript
- •RxJS
Security & Compliance
- •Spring Security
- •JWT Authentication
- •HIPAA Compliance
- •HashiCorp Vault
Testing
- •JUnit 5
- •Testcontainers
- •Mockito
- •Cucumber BDD
DevOps
- •GitHub Actions
- •Docker Registry
- •SonarQube
- •ArgoCD
Data Model
Core Entities
- →Organizations: Tenant isolation, hierarchical relationships
- →Patients: MPI deduplication, consent tracking
- →FHIR Resources: Condition, Medication, Observation, Encounter, etc.
- →Quality Measures: CQL definition, execution results
- →Care Gaps: Identified gaps, recommendations, closure tracking
HIPAA Compliance
- ✓Encryption: AES-256 at rest, TLS 1.3 in transit
- ✓Access Control: Role-based, attribute-based authorization
- ✓Audit Logging: All PHI access logged and monitored
- ✓Multi-tenancy: Complete data isolation by tenant
- ✓Cache Compliance: PHI cache TTL ≤ 5 minutes
API Examples
GET /quality-measure/evaluate
{
"organizationId": "org-123",
"patientIds": ["pat-001", "pat-002"],
"measureId": "HEDIS-IMA",
"reportYear": 2024
}POST /care-gap/detect
{
"patientId": "pat-001",
"conditions": ["E11", "I10"],
"gaps": [
{
"measure": "HbA1c",
"status": "OPEN",
"dueDate": "2024-03-31"
}
]
}Deployment Options
Docker Compose
Description
Local development and small deployments
Time to Deploy
10 minutes
Scalability
Single machine
Infrastructure Cost
Free
Kubernetes
Description
Enterprise-scale cloud-native deployment
Time to Deploy
2-3 hours
Scalability
Multi-region
Infrastructure Cost
$500-5K/month (cloud)
Managed Services
Description
AWS/GCP/Azure with HDIM ops
Time to Deploy
1 week
Scalability
Multi-cloud
Infrastructure Cost
Custom pricing
Performance Characteristics
Response Times
Scalability
- ✓
Database
Horizontal scaling with PostgreSQL replication
- ✓
API Services
Auto-scaling with Kubernetes HPA
- ✓
Message Queue
Kafka partition-based parallelism
- ✓
Data Volume
Handles 100M+ patient records efficiently
EHR Integration Support
Epic
FHIR API + HL7 v2
Cerner
FHIR API + Custom
Athenahealth
FHIR API
NextGen Healthcare
FHIR + Custom
Full Technical Documentation
Access detailed API documentation, architecture diagrams, and deployment guides.
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