ICD-9-CM diagnosis code (retired)
209.36 — Merkel cell carcinoma of other 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 209.36
209.36 is an ICD-9-CM diagnosis code for Merkel cell carcinoma of other 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 C4A.8 (Merkel cell carcinoma of overlapping sites) and C4A.9 (Merkel cell carcinoma, unspecified). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 209.36
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.