ICD-10-CM G31: Other degenerative diseases of nervous system, not elsewhere classified

• Alzheimer's disease (G30.-)
• senility NOS (R41.81)

• 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)

Reye's syndrome (G93.7)

• 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-)

code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)

code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)

• 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)

• Primary progressive aphasia
• Progressive isolated aphasia

Frontal dementia

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

Grey-matter degeneration

Subacute necrotizing encephalopathy

• Lewy body dementia
• Lewy body disease

• Mild cognitive disorder NOS
• Mild neurocognitive disorder of uncertain or unknown etiology

associated alcoholism (F10.-)