ICD-9-CM procedure code (retired)
04.01 — Excision of acoustic neuroma
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-PCS equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 04.01
04.01 is an ICD-9-CM procedure code for excision of acoustic neuroma. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-PCS took over.
The CMS General Equivalence Mappings translate it to one ICD-10-PCS code, 00BN0ZZ (Excision of Acoustic Nerve, Open Approach). The match is approximate, so confirm it against the record.
ICD-10-PCS equivalents
- 00BN0ZZExcision of Acoustic Nerve, Open Approachapproximate
Common questions about 04.01
What is the ICD-10 code for ICD-9 04.01?
- The GEMs map 04.01 to ICD-10-PCS 00BN0ZZ.
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.