G31.2 Degeneration of nervous system due to alcohol

Billable ICD-10-CM code, FY2026.

Applicable to

• Alcoholic cerebellar ataxia
• Alcoholic cerebellar degeneration
• Alcoholic cerebral degeneration
• Alcoholic encephalopathy
• Dysfunction of the autonomic nervous system due to alcohol

Code also

• associated alcoholism (F10.-)

Applies from G31 Other degenerative diseases of nervous system, not elsewhere classified

Excludes2 (not included here)

• Reye's syndrome (G93.7)

Use additional code

• code, if applicable, for codes G31.0-G31.83, G31.85-G31.9, 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)

• RxHCC V08: HCC 112 — Dementia, Except Alzheimer's Disease
• ESRD V24: HCC 52

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 331.7 Cerebral degeneration in diseases classified elsewhere (approximate)

Code annotations containing back-references to G31.2

Back-references to G31.2

• Type 2 Excludes: G04 Encephalitis, myelitis and encephalomyelitis ("alcoholic encephalopathy (G31.2)")
• Type 1 Excludes: G32.81 Cerebellar ataxia in diseases classified elsewhere ("systemic atrophy primarily affecting the central nervous system in alcoholic cerebellar ataxia (G31.2)")
• Type 1 Excludes: G90 Disorders of autonomic nervous system ("dysfunction of the autonomic nervous system due to alcohol (G31.2)")
• Type 2 Excludes: G93.4 Other and unspecified encephalopathy ("alcoholic encephalopathy (G31.2)")

Diagnosis Index entries for G31.2

• Ataxia, ataxy, ataxic › cerebellar (hereditary) › alcoholic
• Ataxia, ataxy, ataxic › cerebellar (hereditary) › in › alcoholism
• Degeneration, degenerative › brain (cortical) (progressive) › alcoholic
• Degeneration, degenerative › brain (cortical) (progressive) › in › alcoholism
• Degeneration, degenerative › cerebellar NOS › alcoholic
• Degeneration, degenerative › cortical (cerebellar) (parenchymatous) › alcoholic
• Degeneration, degenerative › nervous system › alcoholic
• Dysfunction › autonomic › due to alcohol
• Encephalopathy (acute) › alcoholic

Nearby codes

• G31 Other degenerative diseases of nervous system, not elsewhere classified
• G31.0 Frontotemporal dementia
• G31.01 Pick's disease
• G31.09 Other frontotemporal neurocognitive disorder
• G31.1 Senile degeneration of brain, not elsewhere classified
• G31.2 Degeneration of nervous system due to alcohol (this code)
• G31.8 Other specified degenerative diseases of nervous system
• G31.80 Leukodystrophy, unspecified
• G31.81 Alpers disease
• G31.82 Leigh's disease
• G31.83 Neurocognitive disorder with Lewy bodies