MS FHIR FHIR R4 Conformance

MS FHIR version 4.0.728 · Overall: 97% (28/29 tests passed) on round 2026-q2-r000. Source: https://github.com/microsoft/fhir-server.

About MS FHIR

Microsoft FHIR Server (formerly known as the Azure API for FHIR OSS core) is a .NET-based open-source FHIR R4 implementation. It underpins Azure Health Data Services and is a common self-hosted alternative when teams want the Azure stack without the managed-service pricing.

Scores by profile

• Bulk Data kickoff surface: 100% (6/6) — MUST 2/2 · SHOULD 2/2 · MAY 2/2
• FHIR R4 base spec: 96% (22/23) — MUST 6/7 · SHOULD 9/9 · MAY 7/7

Each cell links to the profile-level scoreboard comparing MS FHIR against every other tested server.

Methodology

Tests are authored as FHIR R4 TestScript Resources and run by an open-source executor against a fresh Docker deployment of each server. We deliberately don't compute a composite number — read the methodology for the reasoning.

Compare to other FHIR servers

HAPI · Medplum · Aidbox · Blaze · Spark

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