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Regenstrief LOINC Mapping Assistant


The Regenstrief Institute provides a Windows-based mapping utility called the Regenstrief LOINC Mapping Assistant (RELMA) to facilitate searches through the LOINC database and to assist efforts to map local codes to LOINC codes. Like the LOINC database, this program is also available for free.


Should I Download RELMA or Just Use the Online Search Application?

Short Answer:

Longer Answer:

It depends on what you want to do. Our new web-based LOINC search application is great for exploring LOINC with a simple yet powerful interface. The downloadable version of RELMA gives you a powerful tool for not only searching and browsing LOINC, but also for mapping your local terms to LOINC. Some of its best features are those for importing a set of local terms from a sample of HL7 messages, an automated tool for finding a ranked list of candidate LOINC terms for each local code in your set, flexible display options for viewing the details about a particular LOINC, and an interface for creating a submission to Regenstrief for new LOINC codes, and multilingual searching.


Download Full Version of RELMA

The full version of the RELMA program can be installed only on computers running Microsoft Windows.

Web-based LOINC Search Application

Regenstrief has now launched a new web application that is now available for searching LOINC at:

We've taken some of the best features from the RELMA simple search screen and implemented them in new web application that you can use from anywhere. The search functions are built with Lucene, which is a powerful open-source text search engine that has a Google-like query syntax. The results display in sortable grid, and you can then choose to look at the details of specific terms in three different levels of specificity. In the spirit of open development and because of its rich feature set, we chose the open source ZK framework for building this tool.

Feedback, Feature Requests, Bugs, and other Issues



Current Versions
LOINC 2.59
Released: 2017-02-21

RELMA 6.18
Released: 2017-02-21

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