SNOMED CT in Pathology - IHE Wiki

Precoordinated primitive terms•Whenever a pre-coordinated concept isavailable, that should be the first choice. Ifthe pre-coordinated concept is a primitiveconcept, an alternative is to create a postcoordinatedexpression to ensure thenecessary semantics are recorded. Thereason is that terms encoded with primitiveconcepts are more difficult to query andtest for equivalency (Lee, 2010).