The international standard for identifying health measurements, observations, and documents.

Reference labs, healthcare providers, government agencies, insurance companies, software and device manufacturers, researchers, and consumers from around the globe use LOINC to identify data and move it seamlessly between systems.

It’s free, but invaluable.

LOINC 2.71 is now available!


Full list of LOINCs related to SARS-CoV-2/COVID-19

Guidance for mapping to SARS-CoV-2 LOINC terms

2022 LOINC Conference

Save the dates Oct. 25-27 for the 2022 LOINC Conference in France and online. Details to follow!

LOINC Release Notes

See highlights of content updates in Version 2.71 of LOINC. Release notes from previous versions are also available in the LOINC KB.

New SearchLOINC

Introducing a new way to search for LOINC terms, Parts, Answer Lists, and Groups. Please share your feedback. (LOINC login required to access app.)


Explore LOINC codes directly in your web browser.
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Submission Queue

LOINC continues to evolve thanks to new term requests. See what we're working on now.

Knowledge Base

Find answers to your LOINC questions in this searchable resource.

Request a new LOINC term

Follow our steps to make your submission.