G11
⚠ Non-billable
Hereditary ataxia
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G11
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Nervous System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes2 — not included here, but may code together
- cerebral palsy (G80.-)
- hereditary and idiopathic neuropathy (G60.-)
- metabolic disorders (E70-E88)
Frequently asked questions
What is ICD-10 code G11?
ICD-10-CM code G11 represents Hereditary ataxia. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G11 billable?
No. G11 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is G11 in?
G11 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G11 category
G11.0
Congenital nonprogressive ataxia
Billable
G11.1
Early-onset cerebellar ataxia
Non-billable
G11.2
Late-onset cerebellar ataxia
Billable
G11.3
Cerebellar ataxia with defective DNA repair
Billable
G11.4
Hereditary spastic paraplegia
Billable
G11.5
Hypomyelination - hypogonadotropic hypogonadism - hypodontia
Billable
G11.6
Leukodystrophy with vanishing white matter disease
Billable
G11.8
Other hereditary ataxias
Billable
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