G32.89 Other specified degenerative disorders of nervous system in diseases classified elsewhere

Billable ICD-10-CM code, FY2026.

Applicable to

• Degenerative encephalopathy in diseases classified elsewhere

Applies from G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere

Excludes1 (never code together)

• superior hemorrhagic polioencephalitis [Wernicke's encephalopathy] (E51.2)

Code first

• underlying disease, such as:
• amyloidosis cerebral degeneration (E85.-)
• cerebral degeneration (due to) hypothyroidism (E00.0-E03.9)
• cerebral degeneration (due to) neoplasm (C00-D49)
• cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-)

MS-DRG index

Defines the logic of DRG(s) 070-072 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 349.89 Other specified disorders of nervous system (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Diagnosis Index entries for G32.89

• Degeneration, degenerative › brain (cortical) (progressive) › in › myxedema
• Degeneration, degenerative › brain (cortical) (progressive) › in › neoplastic disease
• Degeneration, degenerative › brain (cortical) (progressive) › in › Niemann-Pick disease
• Degeneration, degenerative › brain (cortical) (progressive) › in › sphingolipidosis
• Degeneration, degenerative › brain (cortical) (progressive) › in › vitamin B12 deficiency
• Degeneration, degenerative › spinal (cord) › amyloid
• Encephalopathy (acute) › degenerative, in specified disease NEC
• Encephalopathy (acute) › in (due to) (with) › lack of vitamin
• Encephalopathy (acute) › pellagrous
• Encephalopathy (acute) › vitamin B deficiency NEC

Nearby codes

• G32 Other degenerative disorders of nervous system in diseases classified elsewhere
• G32.0 Subacute combined degeneration of spinal cord in diseases classified elsewhere
• G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere
• G32.81 Cerebellar ataxia in diseases classified elsewhere
• G32.89 Other specified degenerative disorders of nervous system in diseases classified elsewhere (this code)