MCMedicalCodingSoftware
Free trial
G11.1

G11.1: Early-onset cerebellar ataxia

Non-billable headerICD-10-CM

G11.1 is a non-billable header ICD-10-CM code for early-onset cerebellar ataxia. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 inherited from the categories above G11.1

Not part of this code, but both may be coded when both are present.

Written on G11: Hereditary ataxia

  • cerebral palsy (G80.-)
  • hereditary and idiopathic neuropathy (G60.-)
  • metabolic disorders (E70-E88)

Other codes that can never be billed with G11.1

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • R26Abnormalities of gait and mobility
  • R27Other lack of coordination

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead G11.1

3 child codes. Green means billable.

Other codes under G11

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.