A92.9

What This Code Means

This code describes a fever caused by a virus spread through mosquito bites, but the specific type of mosquito-borne virus has not been identified or documented. It is used when a patient has symptoms of a mosquito-borne viral illness without a confirmed diagnosis of a specific virus like dengue, Zika, or West Nile virus.

Coding Tips

• •Use this code only when the specific mosquito-borne virus cannot be determined; if the virus is identified (such as A92.0 for dengue fever), use the more specific code instead
• •Document the clinical presentation and any test results in the medical record to support the diagnosis and help determine if a more specific code becomes available upon further testing or clinical clarification