A92.3

West Nile virus infection

Header / non-billable

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · A92.3
Synonyms

West Nile fever

Inherited from A92Other mosquito-borne viral fevers
Excludes 1

Ross River disease (B33.1)

Inherited from chapter 1Certain infectious and parasitic diseases
Includes

diseases generally recognized as communicable or transmissible

Excludes 1

certain localized infections - see body system-related chapters

Excludes 2

carrier or suspected carrier of infectious disease (Z22.-) infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) infectious and parasitic diseases specific to the perinatal period (P35-P39) influenza and other acute respiratory infections (J00-J22)

Use additional

code to identify resistance to antimicrobial drugs (Z16.-)

Official Guidelines for A92.3

FY 2026 ›

Sections that reference A92.3

Sections whose FY 2026 text names A92.3, its A92 category, or a range containing it — the chapter guidance above is the authoritative source.