ICD-10 Code A94 – Unspecified arthropod-borne viral fever (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A94 – Unspecified arthropod-borne viral fever
What it is
A94 identifies an arthropod-borne viral fever when the specific virus is not named. Use it for a mosquito-, tick-, or other vector-borne viral illness documented as unspecified.
Clinical signs
Clinical features vary; refer to documentation. Typical reports may include acute fever and other viral symptoms after arthropod exposure, but the record must support a vector-borne viral infection.
When to use this code
Use A94 when the clinician documents an arthropod-borne viral fever without identifying the exact virus. It also fits cases where the chart confirms a vector-borne viral illness but testing or final naming is absent. Check documentation if the provider names a specific disease instead.
Do not use for
Do not use this code for nonviral febrile illnesses, or when a specific arthropod-borne viral diagnosis is documented. If the record is unclear, check documentation before assigning A94.
Coding tip
Code the unspecified category only after confirming the provider did not identify a more specific arthropod-borne viral fever.