2020 ICD-10-CM Diagnosis Code G31.2

Degeneration of nervous system due to alcohol

    2016 2017 2018 2019 2020 Billable/Specific Code
  • G31.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM G31.2 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of G31.2 - other international versions of ICD-10 G31.2 may differ.
Applicable To
  • Alcoholic cerebellar ataxia
  • Alcoholic cerebellar degeneration
  • Alcoholic cerebral degeneration
  • Alcoholic encephalopathy
  • Dysfunction of the autonomic nervous system due to alcohol
Code Also
Code Also Help
A code also note instructs that 2 codes may be required to fully describe a condition but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the encounter.
  • associated alcoholism (
    ICD-10-CM Diagnosis Code F10
    • F10 Alcohol related disorders
      • F10.1 Alcohol abuse
        • F10.10 …… uncomplicated
        • F10.11 …… in remission
        • F10.12 Alcohol abuse with intoxication
          • F10.120 Alcohol abuse with intoxication, uncomplicate...
          • F10.121 …… delirium
          • F10.129 …… unspecified
        • F10.14 Alcohol abuse with alcohol-induced mood disor...
        • F10.15 Alcohol abuse with alcohol-induced psychotic ...
          • F10.150 Alcohol abuse with alcohol-induced psychotic ...
          • F10.151 Alcohol abuse with alcohol-induced psychotic ...
          • F10.159 Alcohol abuse with alcohol-induced psychotic ...
        • F10.18 Alcohol abuse with other alcohol-induced diso...
          • F10.180 Alcohol abuse with alcohol-induced anxiety di...
          • F10.181 Alcohol abuse with alcohol-induced sexual dys...
          • F10.182 Alcohol abuse with alcohol-induced sleep diso...
          • F10.188 Alcohol abuse with other alcohol-induced diso...
        • F10.19 Alcohol abuse with unspecified alcohol-induce...
      • F10.2 Alcohol dependence
        • F10.20 …… uncomplicated
        • F10.21 …… in remission
        • F10.22 Alcohol dependence with intoxication
          • F10.220 Alcohol dependence with intoxication, uncompl...
          • F10.221 Alcohol dependence with intoxication delirium...
          • F10.229 Alcohol dependence with intoxication, unspeci...
        • F10.23 Alcohol dependence with withdrawal
          • F10.230 Alcohol dependence with withdrawal, uncomplic...
          • F10.231 …… delirium
          • F10.232 Alcohol dependence with withdrawal with perce...
          • F10.239 Alcohol dependence with withdrawal, unspecifi...
        • F10.24 Alcohol dependence with alcohol-induced mood ...
        • F10.25 Alcohol dependence with alcohol-induced psych...
          • F10.250 Alcohol dependence with alcohol-induced psych...
          • F10.251 Alcohol dependence with alcohol-induced psych...
          • F10.259 Alcohol dependence with alcohol-induced psych...
        • F10.26 Alcohol dependence with alcohol-induced persi...
        • F10.27 Alcohol dependence with alcohol-induced persi...
        • F10.28 Alcohol dependence with other alcohol-induced...
          • F10.280 Alcohol dependence with alcohol-induced anxie...
          • F10.281 Alcohol dependence with alcohol-induced sexua...
          • F10.282 Alcohol dependence with alcohol-induced sleep...
          • F10.288 Alcohol dependence with other alcohol-induced...
        • F10.29 Alcohol dependence with unspecified alcohol-i...
      • F10.9 Alcohol use, unspecified
        • F10.92 Alcohol use, unspecified with intoxication
          • F10.920 Alcohol use, unspecified with intoxication, u...
          • F10.921 Alcohol use, unspecified with intoxication de...
          • F10.929 Alcohol use, unspecified with intoxication, u...
        • F10.94 Alcohol use, unspecified with alcohol-induced...
        • F10.95 Alcohol use, unspecified with alcohol-induced...
          • F10.950 Alcohol use, unspecified with alcohol-induced...
          • F10.951 Alcohol use, unspecified with alcohol-induced...
          • F10.959 Alcohol use, unspecified with alcohol-induced...
        • F10.96 Alcohol use, unspecified with alcohol-induced...
        • F10.97 Alcohol use, unspecified with alcohol-induced...
        • F10.98 Alcohol use, unspecified with other alcohol-i...
          • F10.980 Alcohol use, unspecified with alcohol-induced...
          • F10.981 Alcohol use, unspecified with alcohol-induced...
          • F10.982 Alcohol use, unspecified with alcohol-induced...
          • F10.988 Alcohol use, unspecified with other alcohol-i...
        • F10.99 Alcohol use, unspecified with unspecified alc...
    F10.-
    )
The following code(s) above G31.2 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G31.2:
  • G00-G99
    2020 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G31
    ICD-10-CM Diagnosis Code G31

    Other degenerative diseases of nervous system, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Use Additional
    Other degenerative diseases of nervous system, not elsewhere classified
Approximate Synonyms
  • Alcohol induced encephalopathy
  • Alcoholic encephalopathy
  • Cerebral degeneration due to alcoholism
  • Degeneration of the brain due to alcoholism
  • Degenerative brain disorder due to alcohol
ICD-10-CM G31.2 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc

Convert G31.2 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to G31.2:
  • Type 1 Excludes: G32.81
    , G90
    , G93.4
    ICD-10-CM Diagnosis Code G32.81

    Cerebellar ataxia in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • celiac disease (with gluten ataxia) (K90.0)
    • cerebellar ataxia (in) neoplastic disease (paraneoplastic cerebellar degeneration) (C00-D49)
    • non-celiac gluten ataxia (M35.9)
    Type 1 Excludes
    • systemic atrophy primarily affecting the central nervous system in alcoholic cerebellar ataxia (G31.2)
    • systemic atrophy primarily affecting the central nervous system in myxedema (G13.2)
    ICD-10-CM Diagnosis Code G90

    Disorders of autonomic nervous system

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dysfunction of the autonomic nervous system due to alcohol (G31.2)
    ICD-10-CM Diagnosis Code G93.4

    Other and unspecified encephalopathy

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • alcoholic encephalopathy (G31.2)
    • encephalopathy in diseases classified elsewhere (G94)
    • hypertensive encephalopathy (I67.4)
    • toxic (metabolic) encephalopathy (G92)
  • Type 2 Excludes: G04
    ICD-10-CM Diagnosis Code G04

    Encephalitis, myelitis and encephalomyelitis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Includes
    • acute ascending myelitis
    • meningoencephalitis
    • meningomyelitis
    Type 1 Excludes
    Type 2 Excludes
    • acute transverse myelitis (G37.3-)
    • alcoholic encephalopathy (G31.2)
    • benign myalgic encephalomyelitis (G93.3)
    • multiple sclerosis (G35)
    • subacute necrotizing myelitis (G37.4)
    • toxic encephalitis (G92)
    • toxic encephalopathy (G92)

Diagnosis Index entries containing back-references to G31.2:
  • Ataxia, ataxy, ataxic R27.0
    ICD-10-CM Diagnosis Code R27.0

    Ataxia, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Type 1 Excludes
    • ataxia following cerebrovascular disease (I69. with final characters -93)
    • cerebellar (hereditary) G11.9
      ICD-10-CM Diagnosis Code G11.9

      Hereditary ataxia, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Hereditary cerebellar ataxia NOS
      • Hereditary cerebellar degeneration
      • Hereditary cerebellar disease
      • Hereditary cerebellar syndrome
      • in
        • alcoholism G31.2
      • alcoholic G31.2
  • Degeneration, degenerative
    • brain (cortical) (progressive) G31.9
      ICD-10-CM Diagnosis Code G31.9

      Degenerative disease of nervous system, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      • in
        • alcoholism G31.2
      • alcoholic G31.2
    • cerebellar NOS G31.9
      ICD-10-CM Diagnosis Code G31.9

      Degenerative disease of nervous system, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      • alcoholic G31.2
    • cortical (cerebellar) (parenchymatous) G31.89
      ICD-10-CM Diagnosis Code G31.89

      Other specified degenerative diseases of nervous system

        2016 2017 2018 2019 2020 Billable/Specific Code
      • alcoholic G31.2
    • nervous system G31.9
      ICD-10-CM Diagnosis Code G31.9

      Degenerative disease of nervous system, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      • alcoholic G31.2
  • Dysfunction
  • Encephalopathy (acute) G93.40
    ICD-10-CM Diagnosis Code G93.40

    Encephalopathy, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    • alcoholic G31.2

ICD-10-CM Codes Adjacent To G31.2
G30 Alzheimer's disease
G30.0 Alzheimer's disease with early onset
G30.1 Alzheimer's disease with late onset
G30.8 Other Alzheimer's disease
G30.9 Alzheimer's disease, unspecified
G31 Other degenerative diseases of nervous system, not elsewhere classified
G31.0 Frontotemporal dementia
G31.01 Pick's disease
G31.09 Other frontotemporal dementia
G31.1 Senile degeneration of brain, not elsewhere classified
G31.2 Degeneration of nervous system due to alcohol
G31.8 Other specified degenerative diseases of nervous system
G31.81 Alpers disease
G31.82 Leigh's disease
G31.83 Dementia with Lewy bodies
G31.84 Mild cognitive impairment, so stated
G31.85 Corticobasal degeneration
G31.89 Other specified degenerative diseases of nervous system
G31.9 Degenerative disease of nervous system, unspecified
G32 Other degenerative disorders of nervous system in diseases classified elsewhere
G32.0 Subacute combined degeneration of spinal cord in diseases classified elsewhere

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.