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Logical Observation Identifiers Names and Codes (LOINC®)

LOINC Welcome

A universal code system for tests, measurements, and observations.


More than 35,000 people in 163 countries use LOINC to make bridges across their islands of health data.

It's free, but invaluable.

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From serum levels of hepatitis B surface antigen to diastolic blood pressure, LOINC has standardized terms for all kinds of observations and measurements that enable exchange and aggregation of electronic health data from many independent systems. 


Common LOINCs

Get started with the most frequently used LOINC codes.

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LOINC Quick Start Guide
LOINC Quick Start Guide

Jumpstart your path to LOINCing prowess
LOINC Intro Webinar Icon
LOINC Introduction Webinar

Presenter: Daniel J. Vreeman, PT, DPT, MSc
Runtime: 58 mins
Current Versions
LOINC 2.48
Released: 2014-06-27

Released: 2014-06-27

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