ICD-10 Code A96.2 – Lassa Fever (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A96.2 – Lassa fever
What it is
Lassa fever is an acute viral hemorrhagic illness caused by Lassa virus. Use this code for confirmed or documented Lassa fever infection, not for nonspecific viral illness.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include fever, weakness, headache, sore throat, and, in severe cases, bleeding or organ involvement.
When to use this code
Use A96.2 when the provider documents Lassa fever as the diagnosis, whether confirmed by testing or clearly stated clinically. It may also apply when the record identifies Lassa virus infection as the cause of the illness. If the note only says suspected viral fever, check documentation before coding.
Do not use for
Do not use this code for unspecified viral infections, other viral hemorrhagic fevers, or routine febrile illnesses without Lassa fever documented. Check documentation if the diagnosis is pending or uncertain.
Coding tip
Verify that the record names Lassa fever specifically; if it does not, code the documented diagnosis instead of assuming A96.2.