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

Full Name for Object

LOINC Top 2000+ Lab Observations - SI Version

Description of the Object identified by the OID

This is an empirically-based list of the most common LOINC result codes that 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 SI Version, for those who favor reporting in molar units (e.g. mmol/L).

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 ValueSet Resource (Beta)

TIP See documentation regarding LOINC's terminology server using HL7's FHIR standard. API access requires a free loinc.org account.