ICD-9-CM diagnosis code (retired)
202.40 — Leukemic reticuloendotheliosis, unspecified site, extranodal and solid organ sites
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 202.40
202.40 is an ICD-9-CM diagnosis code for Leukemic reticuloendotheliosis, unspecified site, extranodal and solid organ sites. 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 2 ICD-10-CM codes, such as C91.40 (Hairy cell leukemia not having achieved remission) and C91.41 (Hairy cell leukemia, in remission). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 202.40
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.