Is G11 a billable ICD-10-CM code?

No. G11 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G11 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Systemic atrophies primarily affecting the central nervous system (G10-G14).

G11

G11 — Hereditary ataxia

Non-billable headerICD-10-CM

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

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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

Other codes that can never be billed with G11

These codes carry an Excludes1 note pointing at G11. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G11 alone.

Q85Phakomatoses, not elsewhere classified
R26Abnormalities of gait and mobility
R27Other lack of coordination
D82Immunodeficiency associated with other major defects
E31Polyglandular dysfunction
G80Cerebral palsy

Risk adjustment

G11 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead G11

9 child codes. Green means billable.

Questions about G11

Is G11 a billable ICD-10-CM code?: No. G11 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G11 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Systemic atrophies primarily affecting the central nervous system (G10-G14).