SNOMED Semantic Query

Overview

SNOMED CT is unique among clinical terminologies: every fully-defined concept carries explicit attribute relationships encoded as FHIR properties. These let you answer questions like "all disorders of the cardiovascular system" or "all conditions with infarct morphology" using structured queries rather than keyword search.

This skill walks through the full workflow: find the pivot concept, inspect its relationships, choose the right attribute type, and build a valueset_expand filter that returns exactly the right set of codes.

SNOMED's Semantic Model

Common relationship attributes