ICD-9-CM Codes ICD-9-PCS Codes

331.9 - Cerebral degeneration, unspecified

GEM Conversion to ICD-10 CM

G31.9

Fs: 10000 – Degenerative disease of nervous system, unspecified

Sibling Codes

331.0

Alzheimer's disease

331.2

Senile degeneration of brain

331.3

Communicating hydrocephalus

331.4

Obstructive hydrocephalus

331.5

Idiopathic normal pressure hydrocephalus (INPH)

331.6

Corticobasal degeneration

331.7

Cerebral degeneration in diseases classified elsewhere

331.9

Cerebral degeneration, unspecified