C4281164

UMLS CUI C4281164 is "Abdominal aortic aneurysm 3.0 to 5.5 centimeters in male".

Abdominal aortic aneurysm 3.0 to 5.5 centimeters in male (CUI C4281164) groups: 1 SNOMED CT concept.

Abdominal aortic aneurysm 3.0 to 5.5 centimeters in male corresponds to SNOMED CT concept 450781000124101.

The Unified Medical Language System is the NLM's meta-terminology that unifies SNOMED CT, ICD-10, ICD-11, RxNorm, LOINC, MeSH, and around 200 other source vocabularies under a single concept identifier (CUI). One UMLS CUI can group dozens of synonymous codes from different terminologies.

A CUI is a stable identifier (like C0011860) that points at a single clinical idea regardless of how that idea is encoded in any specific vocabulary. CUIs are the most reliable way to bridge between terminologies when you need to compare or merge data from multiple sources.

Every UMLS concept page lists the codes it groups together. That gives you a free crosswalk: a SNOMED concept and an ICD-10 code that share a CUI describe the same clinical idea. Our cross_references API returns these groupings inline.

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We track NLM's twice-yearly releases (May AB and November AB). Each release brings new concepts, retirements, and atom updates from the source vocabularies, and our index reflects them within the same week.

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