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We're committed to working together with other standards development organizations to help health data move seamlessly when and where it's needed.


Since it's inception LOINC has been built as an open standard, and Regenstrief is committed to working with others who have similar goals of building seamless networks of health systems and data that live up to the promise of optimal health for all. Here you'll find a brief description of our official collaborations with other SDO's.


Read the latest news releases about our collaborations.


Health Level Seven (HL7)

In 1984 Clem McDonald, MD (the "father" of LOINC) began an effort that produced the first clinical message standard. This work became the Health Level Seven International (HL7) clinical result reporting standard that is now ubiquitous in healthcare systems around the world. Regenstrief investigators have participated in HL7 development since it's inception. It was by design that LOINC fits perfectly as the vocabulary standard for observation identifiers in HL7 messages. In 2011, Regenstrief and HL7 signed a statement of understanding to enhance their long-standing relationship to develop complementary health data standards.

Read more about our collaboration with HL7




IEEE Standards Association

Regenstrief Institute and the IEEE Standards Association (IEEE-SA) have signed a memorandum of understanding (MoU) for collaboration in standards development. Regenstrief, developers of  LOINC®, and IEEE, developers of the 11073™ standards, are connecting standardized terminology and methods of data communication to enhance the interoperability of traditional medical devices and personal health devices. These standards facilitate communication between medical, health care and wellness devices and with external computer systems. By enabling interoperable data exchange, this work will support patients living independently with chronic diseases.

Read more about our collaboration with IEEE




SNOMED International (formerly IHTSDO)

Regenstrief Institute and SNOMED International ( have formed a long-term collaborative relationship with the objective of developing coded content to support order entry and result reporting. The two organizations are building closer links between the SNOMED CT and LOINC terminologies, reducing duplication of effort, and making electronic health records more effective at improving health care. By aligning how the two terminologies represent the attributes of laboratory tests and some types of clinical measurements, this collaboration will provide users a common framework within which to use LOINC and SNOMED CT.

Read more about our collaboration with SNOMED International




Radiological Society of North America (RSNA)

Regenstrief Institute and the Radiological Society of North America (RSNA) have formed a collaborative relationship to unify terms for radiology procedures. The Radiological Society of North America, owns and maintains the RadLex™ medical terminology for radiology, and the Regenstrief Institute Inc. owns and maintains the LOINC® terminology standard for medical tests and measurements. Creating standardized radiology procedure names will improve the quality, consistency and interoperability of radiology test results in electronic medical record systems and health information exchange. The goal of the project is to produce a single unified source of names and codes for radiology procedures with a cooperative governance process.

Read more about our collaboration with RSNA




SDO Charter Organization (SCO)

The mission of SDO Charter Organization (SCO) is to provide an environment that facilitates effective coordination and collaboration on U.S. national healthcare informatics standards development, with recognition of the international and multi-industry stakeholder implications and challenges. Its purposes include: a) facilitating the coordination of conventions for enhanced interoperability among diverse standards development organizations in the areas of health data acquisition, processing, and handling systems, and b) communicating and coordinating when appropriate with the U.S. Technical Advisory Group (US TAG) in order to facilitate a unified representation of US standards (this is not intended to supersede any member’s existing coordination with the US TAG). Regenstrief became a member of the SCO in 2010.

Read more about our collaboration with SCO



Current Versions
LOINC 2.59
Released: 2017-02-21

RELMA 6.18
Released: 2017-02-21

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