G31
Non-billableOther degenerative diseases of nervous system, not elsewhere classified
G31 is the ICD-10-CM code for Other degenerative diseases of nervous system, not elsewhere classified. It is a non-billable category code — use a more specific child code such as G31.0 for billing.
- Status
- Header (non-billable)
- Chapter
- G00-G99
- Subcodes
- 5
- Edition
- FY2026
G00-G99 Diseases of the nervous system
Excludes2 — not included here
- •Reye's syndrome (G93.7)
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-)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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