ICD-10-CM · Chapter 6
G91..4 Hydrocephalus in diseases classified elsewhere
Excludes 1 (cannot be coded together)
- hydrocephalus due to congenital toxoplasmosis (P37.1)
Code First
- underlying condition, such as:
- congenital syphilis (A50.4-)
- neoplasm (C00-D49)
- plasminogen deficiency (E88.02)
Last reviewed: September 2026