August 27, 2026: The FHIR Sandbox CID (Epic Organization ID) has been updated from 0 to 529. Existing FHIR requests using OID system identifiers must have their "CID" element updated from 0 to 529 to continue functioning in the sandbox. For more details, refer to the ID Types for APIs resource.
Registration for the Open@Epic 2026 conference is now open. To submit your registration, view session agenda details, travel information, and FAQs, visit the Open@Epic Conference website.
When everyone's on the same page, technology can make cool things happen. Epic is a strong supporter of the HL7® FHIR® standard as the future of REST-based interoperability. In addition to participating in the standards development process with HL7, Epic is also a member of the Argonaut Project and the Da Vinci Project, each aimed at accelerating the adoption of FHIR.
Epic's work with FHIR means that any health system, hospital, or clinic that uses Epic's comprehensive health record system can connect to any app that also supports FHIR to exchange health information, including but not limited to the U.S. Core Data for Interoperability – or USCDI - data classes and elements.
Epic on FHIR is a free resource for developers who create apps for use by patients and healthcare organizations.
Test APIs against example data
Software registration and client identifier management
Additional developer support documentation