Community Health Systems (CHS) is a Fortune 500 hospital operator that owns, leases, and operates general acute care hospitals across the United States. In compliance with the CMS Interoperability and Patient Access Final Rule (CMS-9115-F), CHS publishes FHIR R4 healthcare interoperability APIs that allow third-party applications to access patient demographics and clinical data, adjudicated claims and encounters, formulary information, and provider directory data. The APIs use the HL7 FHIR R4 standard and SMART-on-FHIR authorization for patient-scoped access.
APIs.json: https://raw.githubusercontent.com/api-evangelist/community-health-systems/refs/heads/main/apis.yml
- Type: Index
- Position: Consumer
- Access: 3rd-Party
- CMS-9115-F
- FHIR
- Healthcare
- Hospitals
- Interoperability
- Patient Access
- Provider Directory
- SMART-on-FHIR
- Created: 2026-03-21
- Modified: 2026-05-19
FHIR R4 API published pursuant to the CMS Interoperability and Patient Access Final Rule (CMS-9115-F). Allows third-party applications, with the patient's authorization, to retrieve adjudicated claims and encounters (ExplanationOfBenefit), formulary and medication data (MedicationKnowledge), and clinical data (Patient and related resources). Authentication uses SMART-on-FHIR OAuth2 with patient/launch scopes.
- Human URL: https://www.chs.net
- Base URL:
https://api.chs.net/fhir/r4
- CMS-9115-F
- FHIR
- Healthcare
- Interoperability
- Patient Access
- SMART-on-FHIR
- Documentation
- C M S Final Rule
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
FHIR R4 read API exposing provider and pharmacy directory data in compliance with CMS interoperability requirements. Third-party applications can search Practitioner, Organization, and Location resources without patient consent (no PHI is exposed by these directory endpoints).
- Human URL: https://www.chs.net
- Base URL:
https://api.chs.net/fhir/r4
- CMS-9115-F
- FHIR
- Healthcare
- Interoperability
- Provider Directory
- Documentation
- C M S Final Rule
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
- Website
- Patient Portal
- Investors
- Privacy Policy
- C M S Interoperability
- H L7 F H I R R4
- JSON-LD — JSON-LD
- JSON Schema — JSON Schema
- Spectral Rules — Spectral
FN: Kin Lane Email: kin@apievangelist.com