athenahealth FHIR R4 API
The athenahealth FHIR R4 server is certified to the ONC Cures Act Final Rule and serves US Core and USCDI profiles. Preview base URL https://api.preview.platform.athenahealth.com/fhir/r4 and production base URL https://api.platform.athenahealth.com/fhir/r4. Supports Patient, Encounter, Observation, Condition, MedicationRequest, AllergyIntolerance, DocumentReference, DiagnosticReport, CarePlan, Goal, Immunization, and other US Core profiles. Authenticated via SMART on FHIR with the same OAuth 2.0 authorization server as the proprietary athenaOne API.
athenahealth FHIR R4 API is one of 5 APIs that athenahealth publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
This API exposes 4 machine-runnable capabilities that can be deployed as REST, MCP, or Agent Skill surfaces via Naftiko and 1 JSON Schema definition.
Tagged areas include EHR, FHIR, Healthcare, HL7, and USCDI. The published artifact set on APIs.io includes API documentation, an OpenAPI specification, 4 Naftiko capability specs, and 1 JSON Schema.