Epic
The largest EHR vendor in the US by market share, headquartered in Verona, Wisconsin.
Epic holds roughly 35-40% of the US acute care EHR market. Its integration capabilities include Bridges (HL7v2 interfaces), Epic on FHIR (FHIR R4 APIs), App Orchard / Showroom (third-party app marketplace), and CDS Hooks support. Epic uses a proprietary database (Caché/IRIS) and InterSystems HealthShare for data exchange. Understanding Epic's interface conventions (character encoding, Z-segments, custom triggers) is essential for hospital integration work.
FAQ
- Does Epic support FHIR?
- Yes. Epic on FHIR provides R4 APIs for patient access, provider-facing apps, and backend system access. Epic also supports SMART on FHIR app launch and CDS Hooks.