Fast Healthcare Interoperability Resources
Fast Healthcare Interoperability Resources (FHIR, pronounced "fire") is a draft standard describing data formats and elements (known as "resources") and an Application Programming Interface (API) for exchanging Electronic health records. It comes from the Health Level 7 (HL7) health-care standards organization.
FHIR builds on previous data format standards from HL7, like HL7 version 2.x and HL7 version 3.x. But it is easier to implement because it uses a modern web-based suite of API technology, including a HTTP-based RESTful protocol, HTML and Cascading Style Sheets for user interface integration, a choice of JSON or XML for data representation, OAuth for authorization and ATOM for query results. One of its goals is to facilitate interoperation between legacy health care systems, to make it easy to provide health care information to health care providers and individuals on a wide variety of devices from computers to tablets to cell phones, and to allow third-party application developers to provide medical applications which can be easily integrated into existing systems.
FHIR provides an alternative to document-centric approaches by directly exposing discrete data elements as services. For example, basic elements of healthcare like patients, admissions, diagnostic reports and medications can each be retrieved and manipulated via their own resource URLs. FHIR was supported at an American Medical Informatics Association meeting by companies like Cerner which value its open and extensible nature.
In February 2014, HL7 International published FHIR as a "Draft Standard for Trial Use" (DSTU), Release 1, version DSTU 1 (v0.0.82). In December 2014, a broad cross-section of stakeholders committed to the Argonaut Project which will provide acceleration funding and political will to publish FHIR implementation guides and profiles for query/response interoperability and document retrieval by May 2015.
A number of high profile players in the health care informatics field are showing interest in and experimenting with FHIR, including CommonWell Health Alliance and SMArt (Substitutable Medical Applications, reusable technologies). In 2014, the U.S. Health IT Policy and the Health IT Standards committees endorsed recommendations for more public (open) APIs. The JASON task force report on "A Robust Health Data Infrastructure" says that FHIR is currently the best candidate API approach, and that such APIs should be part of stage 3 of the "meaningful use" criteria of the U.S. Health Information Technology for Economic and Clinical Health Act. 
- Health Level 7 (HL7)
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- FHIR Standard v0.0.82 (Draft Standard for Trial Use)
- FHIR News Feed on Twitter
- SMART FHIR Starter demo of open source SMART-on-FHIR server (free registration)
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