ICD-9-CM diagnosis code (retired)
237.9 — Neoplasm of uncertain behavior of other and unspecified parts of nervous system
About ICD-9-CM 237.9
237.9 is an ICD-9-CM diagnosis code for neoplasm of uncertain behavior of other and unspecified parts of nervous system. 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 3 ICD-10-CM codes, such as D43.3 (Neoplasm of uncertain behavior of cranial nerves), D43.8 (Neoplasm of uncertain behavior of other specified parts of central nervous system) and D43.9 (Neoplasm of uncertain behavior of central nervous system, unspecified). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 237.9
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.