G91.4 HYDROCEPHALUS IN DISEASES CLASSIFIED ELSEWHERE

Code Information

  • Diagnosis Code: G91.4
  • Short Description: Hydrocephalus in diseases classified elsewhere
  • Long Description: Hydrocephalus in diseases classified elsewhere
  • Code Version: 2025 ICD-10-CM

The code G91.4 is VALID for claim submission

Code Classification

This code is valid for manifestation diagnoses

Synonyms

  • Fungal hydrocephalus
  • Hereditary myopathy associated with hydrocephalus
  • Hydrocephalus due to and following meningitis
  • Hydrocephalus due to Dandy-Walker malformation
  • Hydrocephalus due to tuberculosis of brain
  • Hydrocephalus ex vacuo
  • Hydrocephalus ex vacuo
  • Hydrocephalus ex vacuo due to cerebrovascular disease
  • Hydrocephalus ex vacuo due to degenerative brain disorder
  • Pyogenic hydrocephalus
  • Sequelae of meningitis
  • Tuberculosis of brain
  • Tuberculosis of central nervous system

References to Index of Diseases and Injuries

The code G91.4 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Type 1 Excludes Notes:
    • hydrocephalus due to congenital toxoplasmosis (@P37.1*)
  • Code First:
    • underlying condition, such as:
    • congenital syphilis (@A50.4*-)
    • neoplasm (@C00*-@D49*)
    • plasminogen deficiency (@E88.02*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G91.4 Right Arrow 331.7 Cereb degen in oth dis
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
G91.8 Other hydrocephalus
G91.9 Hydrocephalus, unspecified
This page was last updated on: 10/1/2025
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