ICD-9-CM diagnosis code (retired)
398.91 — Rheumatic heart failure (congestive)
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 398.91
398.91 is an ICD-9-CM diagnosis code for rheumatic heart failure (congestive). 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, I09.81 (Rheumatic heart failure). The match is exact.
ICD-10-CM equivalents
- I09.81Rheumatic heart failureexact match
Common questions about 398.91
What is the ICD-10 code for ICD-9 398.91?
- The GEMs map 398.91 to ICD-10-CM I09.81.
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.