HL7 Official Resources & Links
A comprehensive directory of official HL7, FHIR, and related standards resources for healthcare developers and implementers.
Core FHIR Specifications
- FHIR R4 Specification — The normative FHIR R4 specification (CMS-mandated version)
- FHIR R5 Specification — Latest FHIR release
- FHIR Resource List — Complete index of all FHIR R4 resources
- FHIR RESTful API — HTTP/REST interaction patterns
- FHIR Search — Search parameter reference
U.S. Core and Regulatory IGs
- US Core IG — ONC-mandated base profiles for U.S. healthcare
- USCDI Reference — United States Core Data for Interoperability
Da Vinci Implementation Guides
- Da Vinci Project Home — HL7 Da Vinci project overview
- Da Vinci PDex — Payer Data Exchange
- Da Vinci PAS — Prior Authorization Support
- Da Vinci CRD — Coverage Requirements Discovery
- Da Vinci DTR — Documentation Templates and Rules
- Da Vinci HRex — Health Record Exchange
- Da Vinci Member Attribution — Member Attribution List
CARIN Alliance
- CARIN Blue Button IG — Consumer Directed Payer Data Exchange
- CARIN Alliance Website — Organization homepage
SMART on FHIR
- SMART App Launch IG — Authorization and app launch framework
- SMART Health IT — Project homepage
- SMART App Gallery — Directory of SMART on FHIR apps
Testing and Validation
- Inferno Test Kit — ONC-endorsed FHIR testing framework for US Core, CARIN, Da Vinci
- FHIR Validator — Official HL7 resource validation tool
- Touchstone — FHIR conformance testing platform
- CMS Blue Button 2.0 Sandbox — Medicare FHIR API testing environment
Developer Tools
- HAPI FHIR — Open-source Java FHIR server and client
- Firely (.NET) — .NET FHIR SDK and tools
- fhir.js — JavaScript FHIR client library
- Synthea — Synthetic patient data generator
