
EHR integration in practice: Epic, Oracle Health and athenahealth APIs, HL7 feeds and timelines
An engineer’s map of the real access paths into an EHR: FHIR R4 and SMART on FHIR, HL7 v2 feeds, C-CDA documents, bulk export and network routes, then how Epic, Oracle Health and athenahealth actually hand out access, and which steps gate a project.




