EHR Integration Guide: FHIR, HL7 & Epic Patterns

Details

This guide focuses on integrating with major EHR vendors such as Epic, Cerner (Oracle Health), and MEDITECH. It provides practical insights into the complex standards like FHIR and HL7 v2, emphasizing that a 'hybrid reality' exists: while many current systems still use HL7 v2 for real-time data flows (e.g., ADT or ORU messages), FHIR R4 is utilized for newer applications like patient portals and clinical decision support tools. Furthermore, the guide delves into the technical challenges of SMART on FHIR authentication. It highlights common development pitfalls, such as handling token expiration and refresh processes, and differences in scope syntax across vendors (e.g., how Epic vs. Cerner specify Observation.read). The article also notes mandatory modern security requirements, such as implementing PKCE. Overall, the piece is not merely a list of specifications but offers practical, real-world knowledge necessary for successfully completing an EHR integration project.