LOINC FHIR Vocabulary Service

Pilot FHIR Vocabulary Services for LOINC Value Sets

This API provides key LOINC value sets in the FHIR standard format

FHIR (Fast Healthcare Interoperability Resources) is the latest HL7 standard for exchanging electronic health information. FHIR combines the best features of existing HL7 standards with the latest web technologies to make interoperable healthcare applications dramatically simpler, easier, and faster to develop. FHIR is a work-in-progress, but is developing a nice set of specifications around vocabulary services.

We are piloting the ability to make key LOINC value sets available via an API as a FHIR service. These are meant to be computer-consumable. Results are provided in either JSON or XML. Presently, the only function available is to retrieve the complete value set.

There are more FHIR vocabulary features under development. This blog post by David Hay summarizes some of the key vocabulary services in the FHIR DSTU-2. Our plan is to deploy a FHIR server here on the LOINC website with some of these key features for LOINC content in the future.


These resources require a login with your loinc.org account

Don't have a LOINC account?
Register Now

Available Value Sets

TIP Use an app like Postman as an API client. The free Postman software is available for Windows, MacOS, Linux, and Chrome. Copy these URLs and paste into the GET request of Postman. Be sure you set the Authorization to "Basic Auth" with your LOINC login information.

JSON response for LOINC imaging documents value set

Sample JSON response for ValueSet "imaging-documents"