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LOINC® is the largest reference terminology used for Laboratory and Clinical observations in Canada today. The pan-Canadian LOINC Observation Code Database (pCLOCD) is a Canadian constraint of the larger LOINC terminology and includes example pan-Canadian names for jurisdictional lab viewers and recommended units of measure for use in Canada.

pCLOCD releases contains codes that are specific to use in Canada and is maintained by Canada Health Infoway. It is released on January 31 and July 31 of each year.

The LOINC release contains international content and is maintained by Regenstrief Institute and released in June and December of each year.


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  • pCLOCD
  • pCLOCD Release Notes
  • International LOINC release 
  • Looking for a previous release? This email address is being protected from spambots. You need JavaScript enabled to view it..
  • UCUM (The Unified Code for Units of Measure) 

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