G23.3

ICD-10Billable

Hypomyelination with atrophy of basal ganglia and cerebellum

Official ICD-10-CM descriptor (FY2026)

Hypomyelination with atrophy of the basal ganglia and cerebellum

G23.3 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

H-ABC
TUBB4A-related neurologic disorders

Related codes in G23

Where this code sits

Chapter: 6. Diseases of the nervous system (G00-G99)
Block: Extrapyramidal and movement disorders (G20-G26)
Parent code: G23

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.