Herpesviral meningitis

This code represents inflammation of the meninges (the membranes surrounding the brain and spinal cord) caused by a herpesvirus infection. It is a form of viral meningitis specifically attributed to the herpes simplex virus (HSV) or other herpesviruses.

Use this code when documentation explicitly states a diagnosis of herpesviral meningitis. This typically occurs in patients presenting with symptoms of meningitis (e.g., fever, headache, nuchal rigidity) and laboratory confirmation of a herpesvirus as the causative agent in cerebrospinal fluid (CSF) analysis.

• Ensure the documentation specifies "herpesviral" meningitis; do not assume if only "viral meningitis" is stated.
• Do not confuse with other forms of viral meningitis (G03.0) or bacterial meningitis (G00.-).
• Code any associated neurological complications or sequelae separately, if documented.