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LNC (LOINC) - Synopsis

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The Logical Observation Identifiers Names and Codes terminology (LOINC®) was developed and is maintained by the Regenstrief Institute, Inc., a non-profit medical research organization associated with Indiana University.

The purpose of LOINC is to facilitate the exchange and pooling of clinical or laboratory results for clinical care, outcomes management, claims attachment, and research by providing a set of universal codes and names. LOINC codes allow users to merge clinical results from many sources into one database for patient care, clinical research, or management.

LOINC provides formal names and standardized codes for laboratory and other clinical observations. The data cover laboratory terminology, vital signs, hemodynamics intake/output, EKG, obstetric ultrasound, cardiac echo, urologic, imaging, gastroendoscopic procedures, pulmonary ventilator management, and selected survey instruments.

Metathesaurus Scope
The Metathesaurus representation of LOINC includes expanded abbreviations as well as parts data and the multi-axial hierarchy used by the Regenstrief LOINC Mapping Assistant (RELMA) tool.

The Metathesaurus includes the following LOINC translations:

  1. German, Austria Edition
  2. German, Germany Edition
  3. Greek, Greece Edition
  4. Spanish, Argentina Edition
  5. Spanish, Mexico Edition
  6. Spanish, Spain Edition
  7. Estonian, Estonia Edition
  8. French, Belgium Edition
  9. French, Canada Edition
  10. French, France Edition
  11. Italian, Italy Edition
  12. Korean, Korea Edition
  13. Dutch, Netherlands Edition
  14. Polish, Poland Edition
  15. Portuguese, Brazil Edition
  16. Russian, Russia Edition
  17. Turkish, Turkey Edition
  18. Ukrainian, Ukraine Edition
  19. Chinese, China Edition

LOINC users include:

  • hospitals,
  • health care systems including pediatric care systems,
  • clinical and research laboratories,
  • public health departments, including CDC,
  • electronic health record (EHR) developers, and
  • software developers.

Update Frequency
LOINC is updated twice per year, in February and August.

Metathesaurus Update Frequency
LOINC is an updated source in each Metathesaurus release.

Sites Consulted

  1. LOINC® [Internet]. Indianapolis (IN): Regenstrief Institute, Inc.; c2000-2009. Logical Observation Identifiers Names and Codes (LOINC®); [cited 2009 May 22]. Available from:
  2. LOINC® [Internet]. Indianapolis (IN): Regenstrief Institute, Inc.; c1994-2015. LOINC FAQ; [cited 2015 Oct 16]. Available from: