TerminologyStable

SNOMED CT

Clinical terminology used for conditions, procedures, body sites, findings. ~360K active concepts. The US edition is free-to-use; international edition requires SNOMED International license.

SNOMED CT codes look like 38341003 (Hypertensive disorder). Used in:

Condition.code

Observation.code (sometimes; LOINC more common for labs/vitals)

ProcedureRequest.code

AllergyIntolerance.code

Use a terminology service for $lookup, $expand, $validate.

US National Library of Medicine distributes the US edition free at terminology.nlm.nih.gov.

External links

→NLM SNOMED CT →SNOMED Browser