G23.9Billable

Degenerative disease of basal ganglia, unspecified

Chapter
6. Diseases of the nervous system
Category
G23
Effective date
October 1, 2026

Related codes in category G23

G23Other degenerative diseases of basal gangliaG23.0Hallervorden-Spatz diseaseYesG23.1Progressive supranuclear ophthalmoplegiaYesG23.2Striatonigral degenerationYesG23.3Hypomyelination with atrophy of basal ganglia and cerebellumYesG23.8Other specified degenerative diseases of basal gangliaYes

Frequently asked questions

What is ICD-10 code G23.9?

G23.9 is an ICD-10-CM diagnosis code for Degenerative disease of basal ganglia, unspecified.

Is G23.9 a billable code?

Yes. G23.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is G23.9 in?

G23.9 falls under Chapter 6: Diseases of the nervous system.

When did G23.9 become effective?

G23.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to G23.9?

G23.9 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.