G23.3

G23.3: Hypomyelination with atrophy of the basal ganglia and cerebellum

Billable / specific codeICD-10-CM

G23.3 is a billable, specific ICD-10-CM code for hypomyelination with atrophy of the basal ganglia and cerebellum. It is valid for submission on a claim.

Check G23.3 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

H-ABC
TUBB4A-related neurologic disorders

Excludes2 inherited from the categories above G23.3

Not part of this code, but both may be coded when both are present.

Written on G23: Other degenerative diseases of basal ganglia

multi-system degeneration of the autonomic nervous system (G90.3)

Risk adjustment

G23.3 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 199 Parkinson and Other Degenerative Disease of Basal Ganglia0.615 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Alphabetic index entries that lead here

H-ABC(hypomyelination with atrophy of the basal ganglia and cerebellum)
Hypomyelination with atrophy of the basal ganglia and cerebellum(H-ABC)
Disorder›neurological NEC›TUBB4A-related

Code history

Unchanged in every release from FY2024 to FY2027.