G11.8

G11.8: Other hereditary ataxias

Billable / specific codeICD-10-CM

G11.8 is a billable, specific ICD-10-CM code for other hereditary ataxias. It is valid for submission on a claim.

Check G11.8 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above G11.8

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 G11.8

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

G11.8 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 200 Friedreich and Other Hereditary Ataxias; Huntington Disease0.279 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

G11.8 is named in 14 Medicare coverage policies: 14 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A53057Billing and Coding: Home Health Occupational Therapy
A53064Billing and Coding: Outpatient Occupational Therapy
A53065Billing and Coding: Outpatient Physical Therapy
A54969Billing and Coding: Nerve Conduction Studies and Electromyography

Alphabetic index entries that lead here

Ataxia, ataxy, ataxic›hereditary›specified NEC
Disease, diseased›spinocerebellar›specified NEC

Code history

Unchanged in every release from FY2024 to FY2027.