Lymphocytic choriomeningitis

This code identifies a specific viral infection of the central nervous system caused by the lymphocytic choriomeningitis virus (LCMV). It typically presents as aseptic meningitis, encephalitis, or meningoencephalitis, characterized by inflammation of the meninges and/or brain tissue.

Apply this code when documentation confirms a diagnosis of lymphocytic choriomeningitis, often following exposure to rodents (e.g., mice, hamsters) which are natural hosts for LCMV. Supporting documentation should include laboratory confirmation of LCMV infection (e.g., serology, PCR) or a strong clinical suspicion in an endemic setting.

• Differentiate from other forms of viral meningitis or encephalitis; specific documentation of LCMV is crucial.
• Consider additional codes for any associated neurological complications or sequelae.
• Ensure the provider's documentation clearly states "lymphocytic choriomeningitis" to avoid miscoding.