G91: Hydrocephalus includes acquired hydrocephalus excludes1 Arnold-Chiari syndrome with hydrocephalus (Q07.-) congenital hydrocephalus (Q03.-) spina bifida with hydrocephalus (Q05.-) |
| 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 |