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LOINC=C2=AE is a code system for identifying laboratory tests and other obs=
ervations. It specifies universal codes, names and other attributes for lab=
oratory results as well as clinical reports, physical exam findings, survey=
instruments and other observations. It was developed to enable the exchang=
e and pooling of results from diverse sources in order to enhance clinical =
care, outcomes management and research. LOINC is owned, maintained and lice=
nsed by the Regenstrief Institute Incorporated (RII).
The Cooperation Agreement between IHTSDO and RII dated J= uly 2013 states the cooperative work that is to be performed, including the= creation of maps, expression associations and content alignments between S= NOMED CT and LOINC.
Each LOINC Term that falls within the scope of the Cooperative Work will=
be associated with a SNOMED CT Expression using the SNOMED CT Concept Mode=
l. Each Expression Association links the meaning of a LOINC Term to SNOMED =
CT, without requiring the creation of a new SNOMED CT Concept. Expression a=
ssociations will be defined using Compositional Grammar - Specification an=
d Guide. Each Expression Association will include an indicatio=
n of whether it represents a 'sufficient and necessary' (i.e. equivalent to=
) definition of the LOINC Term, or a 'necessary but not sufficient' (i.e. s=
ubtype of) definition of the LOINC Term.