ICD-9-CM diagnosis code (retired)
204.91 — Unspecified lymphoid leukemia, in remission
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 204.91
204.91 is an ICD-9-CM diagnosis code for unspecified lymphoid leukemia, in remission. 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, C91.91 (Lymphoid leukemia, unspecified, in remission). The match is exact.
ICD-10-CM equivalents
- C91.91Lymphoid leukemia, unspecified, in remissionexact match
Common questions about 204.91
What is the ICD-10 code for ICD-9 204.91?
- The GEMs map 204.91 to ICD-10-CM C91.91.
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.