G91.9 HYDROCEPHALUS, UNSPECIFIED

Code Information

  • Diagnosis Code: G91.9
  • Short Description: Hydrocephalus, unspecified
  • Long Description: Hydrocephalus, unspecified
  • Code Version: 2025 ICD-10-CM

The code G91.9 is VALID for claim submission

Code Classification

Synonyms

  • Acquired hydrocephalus
  • Acquired hydrocephalus of newborn
  • Aqueduct of Sylvius anomaly
  • Arrested hydrocephalus
  • Cerebrospinal fluid rhinorrhea
  • Cerebrospinal fluid rhinorrhea due to hydrocephalus
  • Cranial cerebrospinal fluid leak
  • External hydrocephalus
  • Hydrocephalus
  • Hydrocephalus with anomaly of aqueduct of Sylvius
  • Internal hydrocephalus
  • Leak of cranial cerebrospinal fluid due to hydrocephalus

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G91.9 Right Arrow 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
G91.8 Other hydrocephalus
This page was last updated on: 10/1/2025
Previous Code
Next Code