G11.9
Billable codeHereditary ataxia, unspecified
The ICD-10 code for hereditary ataxia, unspecified is G11.9.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Hereditary cerebellar ataxia NOS
- Hereditary cerebellar degeneration
- Hereditary cerebellar disease
- Hereditary cerebellar syndrome
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- G11.0Congenital nonprogressive ataxia
- G11.1Early-onset cerebellar ataxianon-billable header
- G11.2Late-onset cerebellar ataxia
- G11.3Cerebellar ataxia with defective DNA repair
- G11.4Hereditary spastic paraplegia
- G11.5Hypomyelination - hypogonadotropic hypogonadism - hypodontia
- G11.6Leukodystrophy with vanishing white matter disease
- G11.8Other hereditary ataxias
- G11.9Hereditary ataxia, unspecified
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 3349Approximate match
Associated MS-DRGs
G11.9 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.