G23
⚠ Non-billable
Other degenerative diseases of basal ganglia
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G23
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code G23?
ICD-10-CM code G23 represents Other degenerative diseases of basal ganglia. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G23 billable?
No. G23 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G23 in?
G23 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G23 category
G23.0
Hallervorden-Spatz disease
Billable
G23.1
Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
Billable
G23.2
Striatonigral degeneration
Billable
G23.3
Hypomyelination with atrophy of the basal ganglia and cerebellum
Billable
G23.8
Other specified degenerative diseases of basal ganglia
Billable
G23.9
Degenerative disease of basal ganglia, unspecified
Billable
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