Mumps meningitis

This code represents inflammation of the meninges (the membranes surrounding the brain and spinal cord) caused by the mumps virus. It is a neurological complication of mumps infection, characterized by symptoms such as headache, fever, neck stiffness, and photophobia.

Assign this code when documentation clearly indicates a diagnosis of meningitis directly attributed to a mumps infection. This typically occurs in patients presenting with neurological symptoms following or concurrent with mumps parotitis or other systemic mumps manifestations. Supporting documentation includes positive mumps serology or viral culture from CSF, or a clear clinical diagnosis by a physician.

• Do not use this code for meningitis due to other viral etiologies; ensure mumps is specifically identified as the causative agent.
• Sequence this code as the primary diagnosis when mumps meningitis is the reason for the encounter.
• Consider additional codes for any associated mumps complications, such as mumps orchitis (B26.0) or mumps encephalitis (B26.2).