G23Header code — not billable
Other degenerative diseases of basal ganglia
- Chapter
- 6. Diseases of the nervous system
- Category
- G23
- Effective date
- October 1, 2026
Related codes in category G23
G23.0Hallervorden-Spatz diseaseYesG23.1Progressive supranuclear ophthalmoplegiaYesG23.2Striatonigral degenerationYesG23.3Hypomyelination with atrophy of basal ganglia and cerebellumYesG23.8Other specified degenerative diseases of basal gangliaYesG23.9Degenerative disease of basal ganglia, unspecifiedYes
Frequently asked questions
What is ICD-10 code G23?
G23 is an ICD-10-CM diagnosis code for Other degenerative diseases of basal ganglia.
Is G23 a billable code?
No. G23 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is G23 in?
G23 falls under Chapter 6: Diseases of the nervous system.
When did G23 become effective?
G23 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to G23?
G23 belongs to category G23, which includes 6 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.