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

Reference labs, healthcare organizations, U.S. federal agencies, insurance companies, software vendors, in vitro diagnostic testing companies, and more than 85,500 registered users from 176 countries use LOINC to move data seamlessly between systems.

It’s free, but invaluable.

LOINC Conference - Fall 2019

Help us create six new Guides

We are writing guides across six additional laboratory domains. Sign up to participate in the next round of guide creation and testing!

Panel Browser

Peruse the various types of Panels available within LOINC. This new tool allows you view LOINC Panel content by category.

Submission Queue Details

Browse through the LOINC terms currently in development. Updates are posted daily. See page for important disclaimer.

Explore all the LOINC codes directly in your web browser. More Info

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