Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99) ICD-10-CM
The A90–A99 section covers arthropod-borne viral fevers and viral hemorrhagic fevers with 40 ICD-10-CM diagnosis codes, of which 34 are billable in fiscal year 2026. The section is organized into the 9 code ranges listed below.
Code Ranges in This Section 9 ranges · 40 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the A90–A99 Code Range
ICD-10 codes A90 to A99 cover a group of viral illnesses transmitted by arthropods, such as mosquitoes and ticks, including various viral hemorrhagic fevers. These codes are used to classify diseases like dengue fever, chikungunya, Zika virus disease, yellow fever, and serious hemorrhagic fevers such as Ebola and Marburg virus disease.
This range specifically codes for arthropod-borne viral fevers and viral hemorrhagic fevers. For example, A90 identifies classical dengue fever, while A91 is for dengue hemorrhagic fever, also known as dengue shock syndrome. Other mosquito-borne viral infections, including chikungunya fever (A92.0) and Zika virus disease (A92.5), are also captured here. The codes extend to serious hemorrhagic fevers like Lassa fever (A96.2), Crimean-Congo hemorrhagic fever (A98.0), and Ebola virus disease (A98.4). Unspecified or less common viral fevers are covered under codes such as A94 and A99. These ICD-10 codes help medical coders accurately document various viral infections spread by arthropods, essential for disease surveillance and clinical management.
Questions About This Page
How many codes are in the A90-A99 range?
The A90-A99 range contains 40 ICD-10-CM diagnosis codes in FY 2026. 34 of them are billable, and the rest are category headers that organize the section.
What conditions does A90-A99 cover?
The range covers arthropod-borne viral fevers and viral hemorrhagic fevers. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
