Is G31.8 a billable code?
No. G31.8 is a header code that groups 9 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
G31.8: Other specified degenerative diseases of nervous system
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
G31.8 groups related diagnoses under other specified degenerative diseases of nervous system. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under G31.8
- 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
Other codes in G31 Other degenerative diseases of nervous system, not elsewhere classified
G31.8 questions
What does G31.8 mean?
G31.8 is the ICD-10-CM code for Other specified degenerative diseases of nervous system. 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.