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G31 Other degenerative diseases of nervous system, not elsewhere classified

BackG31.0Frontotemporal dementia2 →G31.01Pick's diseaseG31.09Other frontotemporal neurocognitive disorderG31.1Senile degeneration of brain, not elsewhere classifiedG31.2Degeneration of nervous system due to alcoholG31.8Other specified degenerative diseases of nervous system9 →G31.80Leukodystrophy, unspecifiedG31.81Alpers diseaseG31.82Leigh's diseaseG31.83Neurocognitive disorder with Lewy bodiesG31.84Mild cognitive impairment of uncertain or unknown etiologyG31.85Corticobasal degenerationG31.86Alexander diseaseG31.87Primary progressive apraxia of speechG31.89Other specified degenerative diseases of nervous systemG31.9Degenerative disease of nervous system, unspecified
Category
G31
Other degenerative diseases of nervous system, not elsewhere classified
EXCLUDES
Excludes2: Reye's syndrome (G93.7)
CODING RULE
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-)
Chapter
VI · Diseases of the nervous system
Section
G30-G32
Valid from
Source

CMS ICD-10-CM Tabular List, edition FY2026.

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