ICD-9-CM procedure code (retired)
04.05 — Gasserian ganglionectomy
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 04.05
04.05 is an ICD-9-CM procedure code for Gasserian ganglionectomy. 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 3 ICD-10-PCS codes, such as 00BK0ZZ (Excision of Trigeminal Nerve, Open Approach), 00BK3ZZ (Excision of Trigeminal Nerve, Percutaneous Approach) and 00BK4ZZ (Excision of Trigeminal Nerve, Percutaneous Endoscopic Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
Common questions about 04.05
What is the ICD-10 code for ICD-9 04.05?
- The GEMs map 04.05 to ICD-10-PCS 00BK0ZZ, 00BK3ZZ and 00BK4ZZ.
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.