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ICD-10 Code G23.3: Hypomyelination with atrophy of the basal ganglia and cerebellum

G23.3 is a billable ICD-10 diagnosis code used to classify Hypomyelination with atrophy of the basal ganglia and cerebellum in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

  • May be used when a clinician documents hypomyelination with atrophy of the basal ganglia and cerebellum in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
6Diseases of the nervous system (G00-G99)
block
G20-G26Extrapyramidal and movement disorders
category
G23Other degenerative diseases of basal ganglia
currentG23

Official coding notes

Inclusion terms
  • H-ABC
  • TUBB4A-related neurologic disorders

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

NeurologistGeneral Physician

Coding guidelines

Common synonyms

Hypomyelination with atrophy of the basal ganglia and cerebellum

Frequently asked questions

Code details

CodeG23.3
SystemICD10
Display nameHypomyelination with atrophy of the basal ganglia and cerebellum
ChapterDiseases of the nervous system (G00-G99)
BlockExtrapyramidal and movement disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Disorder(of)H-ABC(hypomyelination with atrophy of the basal ganglia and cerebellum)Hypomyelination with atrophy of the basal ganglia and cerebellum(H-ABC)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.