ICD-10 Code A93.1 – Sandfly fever (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A93.1 – Sandfly fever
What it is
Sandfly fever is an acute viral illness transmitted by sandflies. It is also called phlebotomus fever and is coded when the diagnosis is documented as this specific infection.
Clinical signs
Common findings include sudden fever, headache, malaise, and muscle aches. Clinical features vary; refer to documentation, especially when the chart notes a travel-related febrile illness after insect exposure.
When to use this code
Use A93.1 when the provider documents sandfly fever, phlebotomus fever, or an equivalent confirmed diagnosis. It may also apply when the record clearly links the illness to this infection during evaluation of an acute febrile syndrome.
If the note only says “viral fever,” “fever after travel,” or “arthropod-borne illness” without naming sandfly fever, check documentation before assigning this code.
Do not use for
Do not use this code for unspecified viral fever, dengue, malaria, or other mosquito-borne infections. If the diagnosis is uncertain, code the documented symptoms or check documentation.
Coding tip
Verify the exact organism-specific diagnosis in the assessment, because nonspecific travel fever wording is not enough for A93.1.