ICD-10-CM · Chapter 17 · Q00-QA1
Q03 Congenital hydrocephalus
Includes
- hydrocephalus in newborn
Excludes 1 (cannot be coded together)
- Arnold-Chiari syndrome, type II (Q07.0-)
- acquired hydrocephalus (G91.-)
- hydrocephalus due to congenital toxoplasmosis (P37.1)
- hydrocephalus with spina bifida (Q05.0-Q05.4)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| Q03..0 | Malformations of aqueduct of Sylvius | Yes |
| Q03..1 | Atresia of foramina of Magendie and Luschka | Yes |
| Q03..8 | Other congenital hydrocephalus | Yes |
| Q03..9 | Congenital hydrocephalus, unspecified | Yes |
Last reviewed: September 2026