G31
Header — not billableOther degenerative diseases of nervous system, not elsewhere classified
The ICD-10 code for other degenerative diseases of nervous system, not elsewhere classified is G31.
G31 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 5 more specific codes below.
Clinical notes
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
- Reye's syndrome (G93.7)
Use additional code
This code represents an underlying condition. When a related manifestation is also present, coding convention calls for an additional code to be listed after this one.
- 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-)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •If the associated manifestation or related condition noted above is also documented, an additional code should be reported alongside this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under G31
Related codes in this category
- G30Alzheimer's diseasenon-billable header
- G32Other degenerative disorders of nervous system in diseases classified elsewherenon-billable header
- G31Other degenerative diseases of nervous system, not elsewhere classifiednon-billable header