An interoperability platform enabling clinical data exchange between hospitals within a private healthcare group and external laboratories. The group's 12 hospitals operated on 4 different HIS (Hospital Information Systems). Lab results, imaging reports, and patient summaries were transferred manually between systems, leading to both time loss and data integrity issues.
We built an integration layer based on the HL7 FHIR R4 standard. Custom adapters were written for each HIS; incoming data is transformed into FHIR resources and indexed on a centralized FHIR server (built on HAPI FHIR). Access control is managed via OAuth 2.0 + SMART on FHIR, and all data transfers are encrypted with TLS 1.3. A comprehensive audit trail ensures full compliance with international data protection and healthcare regulations.
