G91.4
BillableHydrocephalus in diseases classified elsewhere
G91.4 is the ICD-10-CM code for Hydrocephalus in diseases classified elsewhere. It is a billable, specific code valid for reimbursement.
G00-G99 Diseases of the nervous system
What this means — in plain language
MedlinePlus · NIHHydrocephalus is the buildup of too much cerebrospinal fluid in the brain. Normally, this fluid cushions your brain. When you have too much, though, it puts harmful pressure on your brain. Hydrocephalus can be congenital, or present at birth. Causes include genetic problems and problems with how the fetus develops. An unusually large head is the main sign of congenital hydrocephalus. Hydrocephalus can also happen…
Read more about Hydrocephalus at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •hydrocephalus due to congenital toxoplasmosis (P37.1)
Code first
Frequently asked questions
- What is ICD-10 code G91.4?
- G91.4 is the ICD-10-CM code for "Hydrocephalus in diseases classified elsewhere". It falls under G00-G99 Diseases of the nervous system.
- Is G91.4 a billable code?
- Yes — G91.4 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from G91.4?
- Excludes1 (not coded here): hydrocephalus due to congenital toxoplasmosis (P37.1).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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