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ICD-9-CM procedure code (retired)

01.20 — Cranial implantation or replacement of neurostimulator pulse generator

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 01.20

01.20 is an ICD-9-CM procedure code for cranial implantation or replacement of neurostimulator pulse generator. 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 0NH00NZ (Insertion of Neurostimulator Generator into Skull, Open Approach), 0NH00NZ (Insertion of Neurostimulator Generator into Skull, Open Approach) and 0NP00NZ (Removal of Neurostimulator Generator from Skull, Open Approach). All of these are approximate matches, so review the record to pick the right one. Some mappings are combinations: more than one ICD-10 code is needed to fully express the ICD-9 code.

ICD-10-PCS equivalents

Common questions about 01.20

What is the ICD-10 code for ICD-9 01.20?

The GEMs map 01.20 to ICD-10-PCS 0NH00NZ, 0NH00NZ and 0NP00NZ.

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.