G10: Huntington's disease
G10 is a billable, specific ICD-10-CM code for huntington's disease. It is valid for submission on a claim.
Check G10 with the rest of the claim: free scrubberUse additional code
Add a secondary code to capture the detail described below.
- code, if applicable, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Huntington's chorea
- Huntington's dementia
Other codes that can never be billed with G10
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
G10 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
G10 is named in 12 Medicare coverage policies: 12 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A56612Billing and Coding: CT of the Head
- A56773Billing and Coding: Neurophysiology Evoked Potentials (NEPs)
- A56868Billing and Coding: Outpatient Speech Language Pathology
Alphabetic index entries that lead here
- Huntington's disease or chorea
- Chorea›hereditary
- Chorea›Huntington's
- Disease, diseased›Huntington's
- Huntington's disease or chorea›with dementia
- Chorea›progressive›hereditary
- Dementia›in›Huntington's disease or chorea
- Disease, diseased›Huntington's›with dementia
- Huntington's disease or chorea›with dementia›with behavioral disturbance
- Dementia›in›Huntington's disease or chorea›with behavioral disturbance
Code history
Unchanged in every release from FY2024 to FY2027.