ICD-10 Code A93 – Other arthropod-borne viral fevers, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A93 – Other arthropod-borne viral fevers, not elsewhere classified
What it is
This code covers arthropod-borne viral fevers that do not have a more specific ICD-10-CM classification. Use it for a documented arboviral febrile illness when the exact virus or named syndrome is not identified.
Clinical signs
Clinical features vary; refer to documentation. Typical notes may describe fever, malaise, headache, myalgia, or other nonspecific viral symptoms after exposure to mosquitoes, ticks, or similar arthropods.
When to use this code
Use A93 when the provider documents an arthropod-borne viral fever but does not name a more specific diagnosis. It also fits when the record confirms an arboviral illness and the organism is not further classified. Check documentation if the chart suggests a specific disease such as dengue, West Nile virus infection, or another coded condition.
Do not use for
Do not use this code when a specific arthropod-borne viral disease is documented and assigned its own code. Avoid it for nonviral febrile illnesses or when the record only mentions exposure without confirmed infection.
Coding tip
Code the most specific confirmed arboviral diagnosis first; use A93 only when the documentation remains nonspecific.