8D64.0

ICD-11 MMS 2026-01

Communicating hydrocephalus

Description

Communicating hydrocephalus, also known as non-obstructive hydrocephalus, is a disorder characterised by impaired cerebrospinal fluid reabsorption in the absence of any CSF-flow obstruction between the ventricles and subarachnoid space.

Exclusions from above levels

  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
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  • 22 – Injury, poisoning or certain other consequences of external causes

Child codes

  • 8D64.00 – Increased cerebrospinal fluid production
  • 8D64.01 – Congenital agenesis of arachnoid villi
  • 8D64.02 – Post haemorrhagic hydrocephalus
  • 8D64.03 – Post traumatic hydrocephalus
  • 8D64.04 – Normal-pressure hydrocephalus
  • 8D64.0Y – Other specified communicating hydrocephalus
  • 8D64.0Z – Communicating hydrocephalus, unspecified

Sibling codes

  • 8D64.1 – Non-communicating hydrocephalus
  • 8D64.2 – Ex-vacuo hydrocephalus
  • 8D64.Z – Hydrocephalus, unspecified

Foundation entity

Communicating hydrocephalus – http://id.who.int/icd/entity/186577228

Part of: 8D64: Hydrocephalus › 08: Diseases of the nervous system