Epic FHIR R4 API

Epic's HL7 FHIR R4 (4.0.1) REST API, aligned to the US Core implementation guides and exposing 59 resource types (Patient, Encounter, Observation, Condition, MedicationRequest, DiagnosticReport, DocumentReference, Appointment, Coverage, ExplanationOfBenefit, and more) with read, search-type, create, and update interactions. Authorized with SMART on FHIR / OAuth 2.0. A live public sandbox CapabilityStatement was harvested verbatim.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/epic-fhir-r4-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: epic-systems:epic-fhir-r4-api
name: Epic FHIR R4 API
description: Epic's HL7 FHIR R4 (4.0.1) REST API, aligned to the US Core implementation guides and exposing
  59 resource types (Patient, Encounter, Observation, Condition, MedicationRequest, DiagnosticReport,
  DocumentReference, Appointment, Coverage, ExplanationOfBenefit, and more) with read, search-type, create,
  and update interactions. Authorized with SMART on FHIR / OAuth 2.0. A live public sandbox CapabilityStatement
  was harvested verbatim.
humanURL: https://fhir.epic.com/Specifications
baseURL: https://fhir.epic.com/interconnect-fhir-oauth/api/FHIR/R4
tags:
- FHIR
- R4
- US Core
properties:
- type: CapabilityStatement
  url: fhir/epic-fhir-r4-capabilitystatement.json
- type: SMARTConfiguration
  url: fhir/epic-fhir-r4-smart-configuration.json
- type: Documentation
  url: https://fhir.epic.com/Documentation?docId=fhirtutorial
- type: APIReference
  url: https://fhir.epic.com/Specifications
- type: Authentication
  url: https://fhir.epic.com/Documentation?docId=oauth2