Epic FHIR R4 REST API

Epic's FHIR R4 API enables access to electronic health record (EHR) data including patients, encounters, observations, conditions, medications, and more. Epic supports SMART on FHIR and OAuth 2.0 for authorization. The open sandbox at fhir.epic.com allows testing with synthetic data. Production access requires registration with Epic's App Orchard and approval from individual health systems.