331: Other cerebral degenerations
Use additional code, where applicable, to identify dementia:
with behavioral disturbance (294.11)
without behavioral disturbance (294.10)
331.5 Idiopathic normal pressure hydrocephalus (INPH)
Normal pressure hydrocephalus NOS
Excludes:
congenital hydrocephalus (742.3)
secondary normal pressure hydrocephalus (331.3)
spina bifida with hydrocephalus (741.0)
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