ICD-9-CM diagnosis code (retired)
446.7 — Takayasu's disease
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 446.7
446.7 is an ICD-9-CM diagnosis code for Takayasu's disease. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, M31.4 (Aortic arch syndrome [Takayasu]). The match is exact.
ICD-10-CM equivalents
- M31.4Aortic arch syndrome [Takayasu]exact match
Common questions about 446.7
What is the ICD-10 code for ICD-9 446.7?
- The GEMs map 446.7 to ICD-10-CM M31.4.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.