G91 Hydrocephalus

Non-billable header with 7 child codes.

Includes

• acquired hydrocephalus

Excludes1 (never code together)

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

Applies from G91 Hydrocephalus

Includes

• acquired hydrocephalus

Excludes1 (never code together)

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

Codes under G91

• G91.0 Communicating hydrocephalus
• G91.1 Obstructive hydrocephalus
• G91.2 (Idiopathic) normal pressure hydrocephalus
• G91.3 Post-traumatic hydrocephalus, unspecified
• G91.4 Hydrocephalus in diseases classified elsewhere
• G91.8 Other hydrocephalus
• G91.9 Hydrocephalus, unspecified

Code annotations containing back-references to G91

Back-references to G91

• Type 1 Excludes: Q03 Congenital hydrocephalus ("acquired hydrocephalus (G91.-)")

Back-references to G91

• Type 1 Excludes: Q03 Congenital hydrocephalus ("acquired hydrocephalus (G91.-)")

Nearby codes

• G91 Hydrocephalus (this code)
• G91.0 Communicating hydrocephalus
• G91.1 Obstructive hydrocephalus
• G91.2 (Idiopathic) normal pressure hydrocephalus
• G91.3 Post-traumatic hydrocephalus, unspecified
• G91.4 Hydrocephalus in diseases classified elsewhere