Mumps meningitis

This code signifies inflammation of the meninges (the membranes surrounding the brain and spinal cord) caused by the mumps virus. It represents a neurological complication of a systemic mumps infection. Patients typically present with symptoms such as headache, fever, neck stiffness, and photophobia in conjunction with parotitis or other signs of mumps.

Apply this code when documentation clearly indicates a diagnosis of meningitis directly attributed to a mumps infection. This diagnosis is often supported by positive mumps serology or viral culture from CSF, alongside clinical signs of meningeal irritation. Use this code as the primary diagnosis when mumps meningitis is the reason for the encounter.

• Always sequence this code before any codes for the systemic mumps infection (e.g., mumps parotitis) if both are documented.
• Ensure documentation specifies "mumps" as the causative agent of the meningitis to differentiate from other viral or bacterial meningitides.
• Do not use this code for aseptic meningitis of unknown etiology; specific viral identification is required.