G31.89 Other specified degenerative diseases of nervous system
Billable ICD-10-CM code, FY2026.
Applies from G31 Other degenerative diseases of nervous system, not elsewhere classified
Excludes2 (not included here)
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-)
Risk adjustment (HCC)
- RxHCC V08: HCC 112 — Dementia, Except Alzheimer's Disease
- ESRD V24: HCC 52
MS-DRG index
Defines the logic of DRG(s) 056-057 in MDC 01.
Approximate ICD-9-CM (GEMs)
331.89 Other cerebral degeneration (approximate)
Diagnosis Index entries for G31.89
- Degeneration, degenerative › brain (cortical) (progressive) › childhood › specified NEC
- Degeneration, degenerative › brain (cortical) (progressive) › cystic
- Degeneration, degenerative › cortical (cerebellar) (parenchymatous)
- Degeneration, degenerative › nervous system › fatty
- Degeneration, degenerative › nervous system › specified NEC
- Degeneration, degenerative › spinal (cord)
- Degeneration, degenerative › spinal (cord) › familial NEC
- Degeneration, degenerative › spinal (cord) › fatty
- Dystrophy, dystrophia › infantile neuraxonal
- Seitelberger's syndrome (infantile neuraxonal dystrophy)
- Syndrome › Seitelberger's
Nearby codes
G31.83 Neurocognitive disorder with Lewy bodiesG31.84 Mild cognitive impairment of uncertain or unknown etiologyG31.85 Corticobasal degenerationG31.86 Alexander diseaseG31.87 Primary progressive apraxia of speechG31.89 Other specified degenerative diseases of nervous system (this code)G31.9 Degenerative disease of nervous system, unspecified