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G31 Oth degenerative diseases of nervous system, NEC

ICD-10-CM category G31 sits in Chapter 6 (Diseases of the nervous system, G00-G99). It contains 14 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

G31.0 Frontotemporal dementiaG31.8 Other specified degenerative diseases of nervous system

Billable codes in G31

CodeDescription
G31.01Pick's disease
G31.09Other frontotemporal neurocognitive disorder
G31.1Senile degeneration of brain, not elsewhere classified
G31.2Degeneration of nervous system due to alcohol
G31.80Leukodystrophy, unspecified
G31.81Alpers disease
G31.82Leigh's disease
G31.83Neurocognitive disorder with Lewy bodies
G31.84Mild cognitive impairment of uncertain or unknown etiology
G31.85Corticobasal degeneration
G31.86Alexander disease
G31.87Primary progressive apraxia of speech
G31.89Other specified degenerative diseases of nervous system
G31.9Degenerative disease of nervous system, unspecified

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