2023 ICD-10-CM Diagnosis Code G31.83

Neurocognitive disorder with Lewy bodies

    2016 2017 2018 2019 2020 2021 2022 2023 - Revised Code Billable/Specific Code
  • G31.83 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • ICD-10-CM G31.83 is a revised 2023 ICD-10-CM code that became effective on October 1, 2022.
  • This is the American ICD-10-CM version of G31.83 - other international versions of ICD-10 G31.83 may differ.
Applicable To
  • Lewy body dementia
  • Lewy body disease
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (
    ICD-10-CM Diagnosis Code F06.7

    Mild neurocognitive disorder due to known physiological condition

      2023 - New Code Non-Billable/Non-Specific Code
    Applicable To
    • Mild neurocognitive impairment due to a known physiological condition
    Code First
    • the underlying physiological condition, such as:
    • Alzheimer's disease (G30.-)
    • frontotemporal neurocognitive disorder (G31.09)
    • human immunodeficiency virus [HIV] disease (B20)
    • Huntington's disease (G10)
    • Neurocognitive disorder with Lewy bodies (G31.83)
    • Parkinson's disease (G20)
    • systemic lupus erythematosus (M32.-)
    • traumatic brain injury (S06.-)
    • vitamin B deficiency (E53-)
    Type 1 Excludes
    F06.7-
    )
The following code(s) above G31.83 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 G31.83:
  • G00-G99
    2023 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 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Use Additional
    Other degenerative diseases of nervous system, not elsewhere classified
Approximate Synonyms
  • Dementia due to parkinson's disease
  • Dementia due to parkinsons disease
  • Dementia with lewy bodies
  • Diffuse lewy body disease
  • Lewy body dementia
  • Lewy body dementia with behavior disturbance
  • Lewy body dementia with behavioral disturbance
  • Lewy body dementia without behavioral disturbance
  • Lewy body disease
  • Senile dementia of the lewy body type
Clinical Information
  • A neurodegenerative disease characterized by dementia, mild parkinsonism, and fluctuations in attention and alertness. The neuropsychiatric manifestations tend to precede the onset of bradykinesia, muscle rigidity, and other extrapyramidal signs. Delusions and visual hallucinations are relatively frequent in this condition. Histologic examination reveals lewy bodies in the cerebral cortex and brain stem. Senile plaques and other pathologic features characteristic of alzheimer disease may also be present. (from neurology 1997;48:376-380; neurology 1996;47:1113-1124)
  • A progressive form of dementia characterized by the presence of protein deposits called lewy bodies in the midbrain and cerebral cortex, and loss of cholinergic and dopaminergic neurons. The signs and symptoms overlap with alzheimer and parkinson disease.
  • Lewy body disease is one of the most common causes of dementia in the elderly. Dementia is the loss of mental functions severe enough to affect normal activities and relationships. Lewy body disease happens when abnormal structures, called lewy bodies, build up in areas of the brain. The disease may cause a wide range of symptoms, including
    • changes in alertness and attention
    • hallucinations
    • problems with movement and posture
    • muscle stiffness
    • confusion
    • loss of memory
    lewy body disease can be hard to diagnose, because parkinson's disease and alzheimer's disease cause similar symptoms. Scientists think that lewy body disease might be related to these diseases, or that they sometimes happen together.lewy body disease usually begins between the ages of 50 and 85. The disease gets worse over time. There is no cure. Treatment focuses on drugs to help symptoms.
  • Neurodegenerative disease marked by the presence of lewy body cells in the cerebral cortex and brain stem. Symptoms often include dementia, parkinsonianism, and striking fluctuations in cognitive performance.
ICD-10-CM G31.83 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc

Convert G31.83 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
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): Revised code
    • New description: Neurocognitive disorder with Lewy bodies
    • 2022 description: Dementia with Lewy bodies
Code annotations containing back-references to G31.83:
  • Code First: F02
    , F02
    , F06.7
    ICD-10-CM Diagnosis Code F02

    Dementia in other diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Code First
    • the underlying physiological condition, such as:
    • Alzheimer's (G30.-)
    • cerebral lipidosis (E75.4)
    • Creutzfeldt-Jakob disease (A81.0-)
    • dementia with Lewy bodies (G31.83)
    • dementia with Parkinsonism (G31.83)
    • epilepsy and recurrent seizures (G40.-)
    • frontotemporal dementia (G31.09)
    • hepatolenticular degeneration (E83.0)
    • human immunodeficiency virus [HIV] disease (B20)
    • Huntington's disease (G10)
    • hypercalcemia (E83.52)
    • hypothyroidism, acquired (E00-E03.-)
    • intoxications (T36-T65)
    • Jakob-Creutzfeldt disease (A81.0-)
    • multiple sclerosis (G35)
    • neurosyphilis (A52.17)
    • niacin deficiency [pellagra] (E52)
    • Parkinson's disease (G20)
    • Pick's disease (G31.01)
    • polyarteritis nodosa (M30.0)
    • prion disease (A81.9)
    • systemic lupus erythematosus (M32.-)
    • traumatic brain injury (S06.-)
    • trypanosomiasis (B56.-, B57.-)
    • vitamin B deficiency (E53.8)
    Includes
    • Major neurocognitive disorder in other diseases classified elsewhere
    Type 1 Excludes
    • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
    Type 2 Excludes
    ICD-10-CM Diagnosis Code F02

    Dementia in other diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Code First
    • the underlying physiological condition, such as:
    • Alzheimer's (G30.-)
    • cerebral lipidosis (E75.4)
    • Creutzfeldt-Jakob disease (A81.0-)
    • dementia with Lewy bodies (G31.83)
    • dementia with Parkinsonism (G31.83)
    • epilepsy and recurrent seizures (G40.-)
    • frontotemporal dementia (G31.09)
    • hepatolenticular degeneration (E83.0)
    • human immunodeficiency virus [HIV] disease (B20)
    • Huntington's disease (G10)
    • hypercalcemia (E83.52)
    • hypothyroidism, acquired (E00-E03.-)
    • intoxications (T36-T65)
    • Jakob-Creutzfeldt disease (A81.0-)
    • multiple sclerosis (G35)
    • neurosyphilis (A52.17)
    • niacin deficiency [pellagra] (E52)
    • Parkinson's disease (G20)
    • Pick's disease (G31.01)
    • polyarteritis nodosa (M30.0)
    • prion disease (A81.9)
    • systemic lupus erythematosus (M32.-)
    • traumatic brain injury (S06.-)
    • trypanosomiasis (B56.-, B57.-)
    • vitamin B deficiency (E53.8)
    Includes
    • Major neurocognitive disorder in other diseases classified elsewhere
    Type 1 Excludes
    • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
    Type 2 Excludes
    ICD-10-CM Diagnosis Code F06.7

    Mild neurocognitive disorder due to known physiological condition

      2023 - New Code Non-Billable/Non-Specific Code
    Applicable To
    • Mild neurocognitive impairment due to a known physiological condition
    Code First
    • the underlying physiological condition, such as:
    • Alzheimer's disease (G30.-)
    • frontotemporal neurocognitive disorder (G31.09)
    • human immunodeficiency virus [HIV] disease (B20)
    • Huntington's disease (G10)
    • Neurocognitive disorder with Lewy bodies (G31.83)
    • Parkinson's disease (G20)
    • systemic lupus erythematosus (M32.-)
    • traumatic brain injury (S06.-)
    • vitamin B deficiency (E53-)
    Type 1 Excludes
  • Type 1 Excludes: G21
    ICD-10-CM Diagnosis Code G21

    Secondary parkinsonism

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dementia with Parkinsonism (G31.83)
    • Huntington's disease (G10)
    • Shy-Drager syndrome (G90.3)
    • syphilitic Parkinsonism (A52.19)
  • Use Additional: G31
    ICD-10-CM Diagnosis Code G31

    Other degenerative diseases of nervous system, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Use Additional

Diagnosis Index entries containing back-references to G31.83:

ICD-10-CM Codes Adjacent To G31.83
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 neurocognitive disorder
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 Neurocognitive disorder with Lewy bodies
G31.84 Mild cognitive impairment of uncertain or unknown etiology
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
G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere
G32.81 Cerebellar ataxia in diseases classified elsewhere
G32.89 Other specified degenerative disorders of nervous system in diseases classified elsewhere
G35 Multiple sclerosis

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