G11.9
✓ Billable
Hereditary ataxia, unspecified
ICD-10-CM · FY2026 · Diseases of the Nervous System
Code
G11.9
System
ICD-10-CM
Billable
Yes — valid for submission
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.
Frequently asked questions
What is ICD-10 code G11.9?
ICD-10-CM code G11.9 represents Hereditary ataxia, unspecified. It is a billable diagnosis code in the Diseases of the Nervous System chapter, effective October 1, 2025 – September 30, 2026.
Is G11.9 billable?
Yes. G11.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is G11.9 in?
G11.9 belongs to the Diseases of the Nervous System chapter (G00–G99) of ICD-10-CM.
Related codes in the G11 category
G11
Hereditary ataxia
Non-billable
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
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