G10 Huntington's disease

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Huntington's chorea
• Huntington's dementia

Use additional code

• 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-)

Applies from G10 Huntington's disease

Applicable to

• Huntington's chorea
• Huntington's dementia

Use additional code

• 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-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 200 — Friedreich and Other Hereditary Ataxias; Huntington Disease
• CMS-HCC V22: HCC 78 — Parkinson's and Huntington's Diseases
• RxHCC V08: HCC 160 — Huntington Disease
• ESRD V24: HCC 78

MS-DRG index

Defines the logic of DRG(s) 056-057 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 333.4 Huntington's chorea

Code annotations containing back-references to G10

Back-references to G10

• Code First: F02 Dementia in other diseases classified elsewhere ("Huntington's disease (G10)")
• Code First: F06.7 Mild neurocognitive disorder due to known physiological condition ("Huntington's disease (G10)")
• Type 1 Excludes: G21 Secondary parkinsonism ("Huntington's disease (G10)")
• Type 1 Excludes: G25.5 Other chorea ("Huntington's chorea (G10)")
• Type 1 Excludes: I02 Rheumatic chorea ("Huntington's chorea (G10)")

Back-references to G10

• Code First: F02 Dementia in other diseases classified elsewhere ("Huntington's disease (G10)")
• Code First: F06.7 Mild neurocognitive disorder due to known physiological condition ("Huntington's disease (G10)")
• Type 1 Excludes: G21 Secondary parkinsonism ("Huntington's disease (G10)")
• Type 1 Excludes: G25.5 Other chorea ("Huntington's chorea (G10)")
• Type 1 Excludes: I02 Rheumatic chorea ("Huntington's chorea (G10)")

Diagnosis Index entries for G10

• Chorea (chronic) (gravis) (posthemiplegic) (senile) (spasmodic) › hereditary
• Chorea (chronic) (gravis) (posthemiplegic) (senile) (spasmodic) › Huntington's
• Chorea (chronic) (gravis) (posthemiplegic) (senile) (spasmodic) › progressive › hereditary
• Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) › in (due to) › Huntington's disease or chorea
• Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) › in (due to) › Huntington's disease or chorea › with behavioral disturbance
• Disease, diseased › Huntington's
• Disease, diseased › Huntington's › with dementia
• Huntington's disease or chorea
• Huntington's disease or chorea › with dementia
• Huntington's disease or chorea › with dementia › with behavioral disturbance

Nearby codes

• G10 Huntington's disease (this code)