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.
Find quick answers in our Knowledge Base.
2024 LOINC Conference
Watch recordings from our most recent event in Washington, DC and online.
The LOINC Ontology: A LOINC and SNOMED CT Interoperability Solution
Learn about this collaboration on our dedicated website.
Community Forum
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SearchLOINC
Find LOINC concepts in your browser with this powerful web app. A free LOINC login is required.
Hierarchy Browser
Instead of searching, peruse LOINC codes via numerous hierarchies. A free LOINC login is required.
Community Forum
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Request a LOINC
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Submission Queue
See all the new concepts we are working on now, including any submissions you may have made.