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Universal Laboratory Order Codes from LOINC



These codes cover more than 95% of lab test orders in the U.S.

The Universal Lab Order Codes Value Set from LOINC is a collection of the most frequent lab orders. It was created for use by developers of provider order entry systems that would deliver them in HL7 messages to laboratories where they could be understood and fulfilled. This value set was developed iteratively through both empirical and consensus-driven approaches. 

The original version was developed by the NLM, Regenstrief Institute, and several organizations and contained an empirical list of the most commonly ordered tests. We often called that list the "Top 300", because it contained about 300 codes that accounted for the majority of the volume of five nationally-representative data sources. 

In 2014, S&I Framework Initiative called aLOINC Order Code launched with the goal of enhancing and expanding the orginal list to more comprehensively cover tests commonly ordered in ambulatory care settings and for tests ordered in the public health settings. The initative used a combination of empiric and consensus based approaches to identify additional LOINC codes to be added to the original list. You can read more about the methodolgy in the initiative's final report

The end result of this work is an updated list of LOINC order codes that serves as a good "starter set".

*Note: This file does not include any deprecated terms.


Universal Lab Order Codes from LOINC (a.k.a Common Lab Orders Value Set)



Current Versions
LOINC 2.59
Released: 2017-02-21

RELMA 6.18
Released: 2017-02-21

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