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G91

Hydrocephalus

• acquired hydrocephalus

• Arnold-Chiari syndrome with hydrocephalus (Q07.-)
• congenital hydrocephalus (Q03.-)
• spina bifida with hydrocephalus (Q05.-)

G91.0

Communicating hydrocephalus

• Secondary normal pressure hydrocephalus

G91.1

Obstructive hydrocephalus

G91.2

(Idiopathic) normal pressure hydrocephalus

• Normal pressure hydrocephalus NOS

G91.3

Post-traumatic hydrocephalus, unspecified

G91.4

Hydrocephalus in diseases classified elsewhere

• hydrocephalus due to congenital toxoplasmosis (P37.1)

G91.8

Other hydrocephalus

G91.9

Hydrocephalus, unspecified