Communicating hydrocephalus

This code describes communicating hydrocephalus, a condition where there is an accumulation of cerebrospinal fluid (CSF) within the brain's ventricles due to impaired absorption of CSF, despite a patent flow between the ventricles and the subarachnoid space. This results in increased intracranial pressure and ventricular enlargement.

Use this code when documentation specifies hydrocephalus that is "communicating" or "non-obstructive," indicating that the flow of CSF within the ventricular system is not blocked. This diagnosis is typically supported by imaging studies (e.g., MRI, CT scan) showing ventricular dilation without evidence of intraventricular obstruction.

• Differentiate from obstructive (non-communicating) hydrocephalus, which has a distinct code.
• Always review imaging reports and physician notes for the specific type of hydrocephalus.
• Do not use this code if the documentation simply states "hydrocephalus" without further specificity; query the provider for clarification.