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 79,900 registered users from 175 countries use LOINC to move data seamlessly between systems.

It’s free, but invaluable.

Lorie Carey, 2019 LOINC award recipient

Panel Browser

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

Request a new LOINC term

You can now submit your request for a new LOINC from our website. Follow our steps to make your submission.

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

Sponsor LOINC

Get special benefits and tools by becoming a LOINC Premium Member.


Find resources and watch videos to get you LOINC-ready fast.

LOINC Essentials

Learn Dr. Vreeman's secrets for mapping local codes to LOINC.