Lymphocytic choriomeningitis

This code represents lymphocytic choriomeningitis (LCM), a viral infection caused by the lymphocytic choriomeningitis virus (LCMV). It typically presents as an aseptic meningitis, encephalitis, or meningoencephalitis, characterized by inflammation of the meninges and sometimes the brain parenchyma. The infection can range from mild, flu-like symptoms to severe neurological manifestations.

Use this code when documentation confirms a diagnosis of lymphocytic choriomeningitis. This diagnosis is often supported by serological testing for LCMV antibodies or PCR detection of viral RNA in cerebrospinal fluid (CSF) or other samples. Clinical scenarios include patients presenting with aseptic meningitis symptoms following exposure to rodents, particularly house mice.

• Ensure documentation clearly specifies "lymphocytic choriomeningitis" to differentiate from other forms of viral meningitis.
• Do not confuse with other viral encephalitides or meningitides; specific viral identification is key.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter.