When a source record contains an ICD10CM diagnosis code that is associated with Domain ID such as “Condition/Procedure”, should we map this record to the Condition_occurrence table or the Procedure_occurence table or both? There are several combination Domain IDs, and we would like to know if this means we should be generating multiple OMOP records from our source records for these instances.
You should map it to the Standard Concepts. They never have combination domains. They go where they go. So, a Condition/Procedure Source Concept is mapped to a Condition Concept (goes to CONDITION_OCCURRENCE) and to a Procedure Concept (goes to PROCEDURE_OCCURRENCE).
The Source Concepts are often dirty. That is why we select the clean Standard Concepts, so those ambiguities get resolved.