G91.4Billable

Hydrocephalus in diseases classified elsewhere

Chapter
6. Diseases of the nervous system
Category
G91
Effective date
October 1, 2026

Related codes in category G91

G91HydrocephalusG91.0Communicating hydrocephalusYesG91.1Obstructive hydrocephalusYesG91.2(Idiopathic) normal pressure hydrocephalusYesG91.3Post-traumatic hydrocephalus, unspecifiedYesG91.8Other hydrocephalusYesG91.9Hydrocephalus, unspecifiedYes

Frequently asked questions

What is ICD-10 code G91.4?

G91.4 is an ICD-10-CM diagnosis code for Hydrocephalus in diseases classified elsewhere.

Is G91.4 a billable code?

Yes. G91.4 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is G91.4 in?

G91.4 falls under Chapter 6: Diseases of the nervous system.

When did G91.4 become effective?

G91.4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to G91.4?

G91.4 belongs to category G91, which includes 7 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.