ICD-10 Code G03.2 – Benign recurrent meningitis [Mollaret] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G03.2 – Benign recurrent meningitis [Mollaret]
What it is
G03.2 identifies benign recurrent meningitis, also called Mollaret meningitis. It refers to repeated, self-limited episodes of meningitis without a persistent cause documented in the record.
Clinical signs
Episodes typically include meningeal irritation such as headache, neck stiffness, fever, and photophobia. Clinical features vary; refer to documentation, and confirm the recurrent pattern and absence of another identified meningitis cause.
When to use this code
Use G03.2 when the provider documents benign recurrent meningitis or Mollaret meningitis as the diagnosis. It fits repeat meningitis episodes that resolve and recur, with no alternate infectious, autoimmune, or structural explanation recorded.
Code it from the provider’s stated diagnosis, not from meningitis symptoms alone. If the chart only says “recurrent meningitis,” check documentation for the specific type before assigning this code.
Do not use for
Do not use G03.2 for acute meningitis with a known organism, chronic meningitis, or aseptic meningitis unless benign recurrent meningitis is explicitly documented. Check documentation.
Coding tip
Assign G03.2 only when the record clearly identifies Mollaret or benign recurrent meningitis, and verify that other causes have been ruled out or are not documented.