Other degenerative diseases of the nervous system (G30-G32)
G30Alzheimer's disease
Includes: Alzheimer's dementia senile and presenile forms
Use Additional Code: code, if applicable, to identify:
› delirium, if applicable (F05)
› 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-)
Excludes 1: senile degeneration of brain NEC (G31.1)
› senile dementia NOS (F03)
› senility NOS (R41.81)
G30.0Alzheimer's disease with early onset
G30.1Alzheimer's disease with late onset
G30.8Other Alzheimer's disease
G30.9Alzheimer's disease, unspecified
G31Other degenerative diseases of nervous system, not elsewhere classified
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-)
Excludes 2: Reye's syndrome (G93.7)
G31.0Frontotemporal dementia
G31.01Pick's disease
› Primary progressive aphasia
› Progressive isolated aphasia
G31.09Other frontotemporal neurocognitive disorder
› Frontal dementia
Use Additional Code: code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
G31.1Senile degeneration of brain, not elsewhere classified
Excludes 1: Alzheimer's disease (G30.-)
› senility NOS (R41.81)
G31.2Degeneration of nervous system due to alcohol
› 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.-)
G31.8Other specified degenerative diseases of nervous system
G31.80Leukodystrophy, unspecified
G31.81Alpers disease
› Grey-matter degeneration
G31.82Leigh's disease
› Subacute necrotizing encephalopathy
G31.83Neurocognitive disorder with Lewy bodies
› Lewy body dementia
› Lewy body disease
Use Additional Code: code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
G31.84Mild cognitive impairment of uncertain or unknown etiology
› Mild cognitive disorder NOS
› Mild neurocognitive disorder of uncertain or unknown etiology
Use Additional Code: code to identify presence of:
› alcohol abuse and dependence (F10.-)
› exposure to environmental tobacco smoke (Z77.22)
› history of tobacco dependence (Z87.891)
› hypertension (I10-I1A)
› occupational exposure to environmental tobacco smoke (Z57.31)
› tobacco dependence (F17.-)
› tobacco use (Z72.0)
Excludes 1: age related cognitive decline (R41.81)
› altered mental status (R41.82)
› cerebral degeneration (G31.9)
› cerebrovascular diseases (I60-I69)
› change in mental status (R41.82)
› cognitive deficits following (sequelae of) cerebral hemorrhage or infarction (I69.01-, I69.11-, I69.21-, I69.31-, I69.81-, I69.91-)
› cognitive impairment due to intracranial or head injury (S06.-)
› dementia (F01.-, F02.-, F03)
› mild neurocognitive disorder due to a known physiological condition (F06.7-)
› neurologic neglect syndrome (R41.4)
› personality change, nonpsychotic (F68.8)
G31.85Corticobasal degeneration
G31.86Alexander disease
G31.89Other specified degenerative diseases of nervous system
G31.9Degenerative disease of nervous system, unspecified
G32Other degenerative disorders of nervous system in diseases classified elsewhere
G32.0Subacute combined degeneration of spinal cord in diseases classified elsewhere
› Dana-Putnam syndrome
› Sclerosis of spinal cord (combined) (dorsolateral) (posterolateral)
Code First: underlying disease, such as:
› other dietary vitamin B12 deficiency anemia (D51.3)
› vitamin B12 deficiency anemia due to intrinsic factor deficiency (D51.0)
› vitamin B12 deficiency anemia, unspecified (D51.8)
› vitamin B12 deficiency (E53.8)
Excludes 1: syphilitic combined degeneration of spinal cord (A52.11)
G32.8Other specified degenerative disorders of nervous system in diseases classified elsewhere
Code First: underlying disease, such as:
› amyloidosis cerebral degeneration (E85.-)
› cerebral degeneration (due to) hypothyroidism (E00.0-E03.9)
› cerebral degeneration (due to) neoplasm (C00-D49)
› cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-)
Excludes 1: superior hemorrhagic polioencephalitis [Wernicke's encephalopathy] (E51.2)
G32.81Cerebellar ataxia in diseases classified elsewhere
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)
Excludes 1: 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)
G32.89Other specified degenerative disorders of nervous system in diseases classified elsewhere
› Degenerative encephalopathy in diseases classified elsewhere