LOINC Collection: LOINC Top 2000+ Lab Observations - US Version

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LOINC Top 2000+ Lab Observations - US Version

Description of the Object identified by the OID

This is an empirically-based list of the most common LOINC result codes. It contains just over 2000 LOINC codes that represent about 98% of the test volume carried by three large organizations that mapped all of their lab tests to LOINC codes.

This is the US Version, for those who favor reporting in mass units (e.g. mg/dL).

Using the LOINC online search application, the value set expansion can be fulfilled with this query.

Download the Value Set Expansion


Responsible Body

Regenstrief Institute, Inc.

URL for Object


FHIR Value Set Resource (Beta)

Tip: Use software such as Postman as an API client. Requires login with your usual loinc.org account.