Search Browse Crosswalk Fees Tools Pricing

Codelle

AI-powered medical coding assistant for healthcare practices and billers.

Pricing Privacy Terms

© 2026 Codelle. All rights reserved.

CPT® copyright 2026 American Medical Association. All rights reserved. CPT is a registered trademark of the American Medical Association. Applicable FARS/DFARS restrictions apply to government use. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use.

ICD-10-CM G91 — Hydrocephalus | Codelle

G91

ICD-10-CM

Hydrocephalus

Clinical Notes

Includes

acquired hydrocephalus

Excludes 1 — Not coded here

Arnold-Chiari syndrome with hydrocephalus (Q07.-)
congenital hydrocephalus (Q03.-)
spina bifida with hydrocephalus (Q05.-)

Code Hierarchy

Subcodes (7)

G91.0Communicating hydrocephalus

G91.1Obstructive hydrocephalus

G91.2(Idiopathic) normal pressure hydrocephalus

G91.3Post-traumatic hydrocephalus, unspecified

G91.4Hydrocephalus in diseases classified elsewhere

G91.8Other hydrocephalus

G91.9Hydrocephalus, unspecified

Same Category

G91.0Communicating hydrocephalus G91.1Obstructive hydrocephalus G91.2(Idiopathic) normal pressure hydrocephalus G91.3Post-traumatic hydrocephalus, unspecified G91.4Hydrocephalus in diseases classified elsewhere G91.8Other hydrocephalus G91.9Hydrocephalus, unspecified