How to access LOINC
Downloading LOINC
Version 2.83
Regenstrief Institute releases updates to LOINC twice each year. The current version is 2.83. It contains the CSV table files along with several artifacts to help in research and implementation.
Previous releases
Generally you should always use the currently available version, however we realize past releases may help in auditing or for historical purposes. All older LOINC releases are available in our archive.
Searching and browsing
SearchLOINC
We have created a web app with powerful filter and search syntax functionality to help you find appropriate LOINC codes. You can also export search results.
Hierarchy Browser
This tool is the complement to SearchLOINC where you can view various tree structures in LOINC to help identify appropriate concepts for use.
LOINC Ontology Browser
LOINC can be viewed and searched within a SNOMED CT hierarchy structure using this web-based tool.
Programmatic access (API)
LOINC Terminology Service
You can access LOINC content using our terminology service powered by HL7® FHIR®.
Search API
The programmatic interface used to power SearchLOINC is available for direct access.
Download API
Programmatic access to the LOINC download file is available to use in your intake scripts.
Other sources
Language translations
LOINC concepts have been translated from the source U.S. English to several dialects. These are included in our download file and APIs.
UMLS
LOINC is integrated into the Unified Medical Language System (UMLS) Metathesaurus database from the U.S. National Library of Medicine (NLM).