ICD-9-CM diagnosis code (retired)
746.6 — Congenital mitral insufficiency
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 746.6
746.6 is an ICD-9-CM diagnosis code for congenital mitral insufficiency. 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, Q23.3 (Congenital mitral insufficiency). The match is exact.
ICD-10-CM equivalents
- Q23.3Congenital mitral insufficiencyexact match
Common questions about 746.6
What is the ICD-10 code for ICD-9 746.6?
- The GEMs map 746.6 to ICD-10-CM Q23.3.
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.