2026 ICD-10-CM Diagnosis Code G11Hereditary ataxia

ICD-10-CM Codes›G00–G99›G10-G14›G11

ICD-10-CM G11
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G11 is a non-billable ICD-10-CM category code for hereditary ataxia, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G11.0, G11.10, G11.11, and G11.19.

Code Identity

ICD-10-CM Code
G11
Billable Status
No — Non-Billable Category
Code Describes
Hereditary ataxia
Chapter
G10-G14
Systemic atrophies primarily affecting the central nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG10-G14Systemic atrophies primarily affecting the central nervous system
CategoryG11Hereditary ataxia
This CodeG11Hereditary ataxia

Specific Coding for Hereditary ataxiaOverview

Non-specific codes like G11 require more characters. Use one of these billable codes instead:

  • Use G11.0 for Congenital nonprogressive ataxia

  • G11.1 for Early-onset cerebellar ataxia

  • Use G11.10 for Early-onset cerebellar ataxia, unspecified

  • Use G11.11 for Friedreich ataxia

  • Use G11.19 for Other early-onset cerebellar ataxia

  • Use G11.2 for Late-onset cerebellar ataxia

  • Use G11.3 for Cerebellar ataxia with defective DNA repair

  • Use G11.4 for Hereditary spastic paraplegia

  • Use G11.5 for Hypomyelination - hypogonadotropic hypogonadism - hypodontia

  • Use G11.6 for Leukodystrophy with vanishing white matter disease

  • Use G11.8 for Other hereditary ataxias

  • Use G11.9 for Hereditary ataxia, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • cerebral palsy G80
  • hereditary and idiopathic neuropathy G60
  • metabolic disorders E70 E88

Patient EducationClinical

Cerebellar Disorders

When you play the piano or hit a tennis ball you are activating the cerebellum. The cerebellum is the area of the brain that controls coordination and balance. Problems with the cerebellum include:

Read the full article at MedlinePlus

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G11Overview

Is G11 (Hereditary ataxia) a billable code?

No. This is a category header that groups the codes for hereditary ataxia, and headers cannot be submitted on claims. Claims for hereditary ataxia need a more specific code from this category, such as G11.0, G11.10, and G11.11.