ICD-10 Code A87.2 – Lymphocytic choriomeningitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A87.2 – Lymphocytic choriomeningitis
What it is
A87.2 identifies lymphocytic choriomeningitis, a viral infection that can affect the meninges and brain. Use it when documentation specifically states this diagnosis.
Clinical signs
Clinical features may include fever, headache, meningitis, or encephalitis. Check documentation for neurologic findings, cerebrospinal fluid involvement, or confirmed clinician diagnosis.
When to use this code
Use A87.2 when the provider documents lymphocytic choriomeningitis as the confirmed reason for the encounter. It may also apply when the record clearly identifies this viral meningoencephalitic infection, even if the presentation is recorded as meningitis or encephalitis. If the note is vague, check documentation.
Do not use for
Do not use this code for unspecified viral meningitis, other viral meningoencephalitis, or suspected infection without documentation. If the organism or diagnosis is different, code the documented condition instead.
Coding tip
Code the documented diagnosis exactly; if lymphocytic choriomeningitis is not explicitly stated, verify the chart before assigning A87.2.