Payer / Insurance Systems
| Platform | Interoperability Method | FHIR R4 Support | Notes |
|---|---|---|---|
| CMS (Medicare/Medicaid) | FHIR R4 APIs | ✅ Required | Patient Access & Provider Directory |
| UnitedHealthcare | FHIR APIs | ✅ Native | Claims, coverage, eligibility |
| Aetna | FHIR APIs | ✅ Native | Payer data exchange |
| Blue Cross Blue Shield | FHIR APIs | ✅ Native | CMS interoperability rule |
| Cigna | FHIR APIs | ✅ Native | Member & claims access |