G91.8 OTHER HYDROCEPHALUS

Code Information

Diagnosis Code: G91.8
Short Description: Other hydrocephalus
Long Description: Other hydrocephalus
Code Version: 2025 ICD-10-CM

The code G91.8 is VALID for claim submission

Code Classification

Diseases of the nervous system (G00–G99)
- Other disorders of the nervous system (G89-G99)
  - Hydrocephalus (G91)

Synonyms

Chronic brain-hydrocephalus syndrome
Hydrocephalus following infectious disease
Hydrocephalus following infectious disease
Isolated fourth ventricle hydrocephalus
Obstructive hydrocephalus
Postinfectious hydrocephalus

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
G91.8		331.4	Obstructiv hydrocephalus

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description
G91	Hydrocephalus
G91.0	Communicating hydrocephalus
G91.1	Obstructive hydrocephalus
G91.2	(Idiopathic) normal pressure hydrocephalus
G91.3	Post-traumatic hydrocephalus, unspecified
G91.4	Hydrocephalus in diseases classified elsewhere
G91.9	Hydrocephalus, unspecified

This page was last updated on: 10/1/2025

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