FHIR is a standard for exchanging healthcare information electronically. Publishing JSON is not enough: systems must also agree on meaning, identity, terminology, and usage rules.
Why interoperability matters
A medical record loses value when each system represents people, observations, and encounters differently. Interoperability moves information with context and traceability; it does not remove security, consent, or governance decisions.
Before combining data, teams must define how patients, practitioners, and organizations reconcile across systems.
Terminology
Local codes and clinical vocabularies require explicit mapping; equivalence must not be inferred silently.
Validation and errors
Invalid resources must retain diagnostics and provenance so they can be corrected without losing the original record.
Exchange mechanism
FHIR supports several approaches. REST, documents, and messaging are not synonyms and must match the actual workflow.
Claim boundary
This page does not claim FHIR certification, regulatory compliance, or guaranteed clinical interoperability. It describes prior professional experience and a reference architecture that must adapt to specific profiles, regulation, and agreements.