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Technical Milestone |
Affiliations of the authors: Intermountain Health Care, Salt Lake City, Utah (SMH); University of Utah, Salt Lake City (RAR); Indiana University, Indianapolis (CJM, DLeland, JB); Ghent University, Belgium (GJEDM, TF); Duke University, Durham, North Carolina (WDB); University of Washington, Seattle (AWF); Hewlett Packard, Medical Products Group, Andover, Massachusetts (WGF); SpaceLabs Medical, Inc., Redmond, Washington (WRT); Mayo Medical Laboratories, Rochester, Minnesota (DLeavelle); Department of Veterans Affairs, Dallas, Texas (FS); Quest Informatics, Teterboro, New Jersey (BG, PM); Quintiles Inc., Morrisville, North Carolina (LC); Regenstrief Institute for Health Care, Indianapolis, Indiana (KH).
Correspondence and reprints: Stanley M. Huff, MD, Intermountain Health Care, 36 South State Street, Suite 800, Salt Lake City, UT 84111. e-mail: <coshuff{at}ihc.com>.
Abstract The LOINC (Logical Observation Identifier Names and Codes) vocabulary is a set of more than 10,000 names and codes developed for use as observation identifiers in standardized messages exchanged between clinical computer systems. The goal of the study was to create universal names and codes for clinical observations that could be used by all clinical information systems. The LOINC names are structured to facilitate rapid matching, either automated or manual, between local vocabularies and the universal LOINC codes. If LOINC codes are used in clinical messages, each system participating in data exchange needs to match its local vocabulary to the standard vocabulary only once. This will reduce both the time and cost of implementing standardized interfaces. The history of the development of the LOINC vocabulary and the methodology used in its creation are described.
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