ICD-9-CM procedure code (retired)
05.9 — Other operations on nervous system
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 05.9
05.9 is an ICD-9-CM procedure code for other operations on nervous system. 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 00Q00ZZ (Repair Brain, Open Approach), 00Q03ZZ (Repair Brain, Percutaneous Approach) and 00Q04ZZ (Repair Brain, 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 05.9
What is the ICD-10 code for ICD-9 05.9?
- The GEMs map 05.9 to ICD-10-PCS 00Q00ZZ, 00Q03ZZ and 00Q04ZZ.
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.