What is FHIR?

FHIR (Fast Healthcare Interoperability Resources) is an HL7 standard for exchanging healthcare information electronically. It defines a set of Resources — structured data objects representing clinical and administrative concepts — and a REST API for creating, reading, updating, and deleting them over HTTP.

FHIR was created to replace older, harder-to-implement standards (HL7 v2, CDA) with a modern approach using JSON, XML, HTTP, and OAuth. The goal is to make healthcare data portable and interoperable across systems, institutions, and countries.