Is G31 a billable code?
No. G31 is a header code that groups 14 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
G31: Other degenerative diseases of nervous system, not elsewhere classified
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
G31 groups related diagnoses under other degenerative diseases of nervous system, not elsewhere classified. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under G31
- 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
G31 questions
What does G31 mean?
G31 is the ICD-10-CM code for Other degenerative diseases of nervous system, not elsewhere classified. It is in chapter 6, Diseases of the nervous system (G00-G99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.