G23 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Other degenerative diseases of basal ganglia.
Multi-system degeneration of the autonomic nervous system (G90.3)
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Hallervorden-Spatz disease
Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
Striatonigral degeneration
Hypomyelination with atrophy of the basal ganglia and cerebellum
Other specified degenerative diseases of basal ganglia
Degenerative disease of basal ganglia, unspecified
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