ICD-9-CM diagnosis code (retired)
186.9 — Malignant neoplasm of other and unspecified testis
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 186.9
186.9 is an ICD-9-CM diagnosis code for malignant neoplasm of other and unspecified testis. 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 C62.10 (Malignant neoplasm of unspecified descended testis) and C62.90 (Malignant neoplasm of unspecified testis, unspecified whether descended or undescended). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 186.9
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.