G23.9 DEGENERATIVE DISEASE OF BASAL GANGLIA, UNSPECIFIED

Code Information

Diagnosis Code: G23.9
Short Description: Degenerative disease of basal ganglia, unspecified
Long Description: Degenerative disease of basal ganglia, unspecified
Code Version: 2025 ICD-10-CM

The code G23.9 is VALID for claim submission

Code Classification

Diseases of the nervous system (G00–G99)
- Extrapyramidal and movement disorders (G20-G26)
  - Other degenerative diseases of basal ganglia (G23)

Synonyms

Pallidal degeneration
Pallidonigroluysian degeneration
Pallidopontonigral degeneration

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
G23.9		333.0	Degen basal ganglia NEC

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description
G23	Other degenerative diseases of basal ganglia
G23.0	Hallervorden-Spatz disease
G23.1	Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
G23.2	Striatonigral degeneration
G23.3	Hypomyelination with atrophy of the basal ganglia and cerebellum
G23.8	Other specified degenerative diseases of basal ganglia

This page was last updated on: 10/1/2025

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