A92.3 ICD-10-CA code: West Nile virus infection
A92.3 is the ICD-10-CA code for “West Nile virus infection” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
A92.3West Nile virus infection
ICD-10-CA · Canada · Also written A923
Index terms
Entries in CIHI’s alphabetical index that lead to A92.3. Searching the index by the condition the note names is how coders reach this code.
- West Nile fever
- Fever, West, Nile (viral)
- Virus, viral NEC, West Nile
- Encephalomyelitis, West Nile
- Meningoencephalitis, West Nile
- Meningoencephalomyelitis, West Nile
- Fever, brain, due to West Nile (viral)
- Fever, cerebral, due to West Nile virus
- Meningitis (basal) (cerebral) (spinal), West Nile
- Infection, infected (opportunistic), West Nile (viral)
- Infection, infected (opportunistic), brain, due to West Nile (viral)
- Inflammation, inflamed, inflammatory (with exudation), brain, due to West Nile (viral)
- Inflammation, inflamed, inflammatory (with exudation), cerebral, due to West Nile virus
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute), West Nile
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute), viral, virus, mosquito borne, West Nile
Notes for A92.3
As CIHI prints them, with any note A92.3 takes from the headings above it.
Includes
- West Nile:• encephalitis• encephalomyelitis• fever• meningitis• virus
- Diseases generally recognized as communicable or transmissibleFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Use additional code
Add a code for this detail when the note documents it.
- Use additional code to identify any associated:• acute flaccid paralysis (G81.0-)• facial weakness (G51.9)
- Use additional code (U82-U84) to identify resistance to antimicrobial drugsFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Excludes
Conditions classified elsewhere.
- Ross River disease (B33.1)From A92 Other mosquito-borne viral fevers
- Carrier or suspected carrier of infectious disease (Z22.-)certain localized infections - see body system-related chaptersinfectious and parasitic diseases:• complicating pregnancy, childbirth and the puerperium [except obstetrical tetanus] (O98.-)• specific to the perinatal period [except tetanus neonatorum, whooping cough, congenital syphilis, perinatal gonococcal infection and perinatal human immunodeficiency virus [HIV] disease] (P35-P39)influenza and other acute respiratory infections (J00-J22)From Chapter 1: Certain infectious and parasitic diseases (A00-B99)
Where A92.3 sits
- 1ChapterChapter 1: Certain infectious and parasitic diseases (A00-B99)
- 2Block A92-A99Arthropod-borne viral fevers and viral haemorrhagic fevers
- 3Category A92Other mosquito-borne viral fevers
- 4Valid code A92.3West Nile virus infection
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code A92.3 mean?
A92.3 is the ICD-10-CA code for “West Nile virus infection” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is A92.3 in ICD-10-CA?
A92.3 sits under A92 Other mosquito-borne viral fevers, within A92-A99 Arthropod-borne viral fevers and viral haemorrhagic fevers, within Chapter 1: Certain infectious and parasitic diseases (A00-B99).
What coding notes apply to A92.3?
ICD-10-CA lists Includes, Use additional code, Excludes notes for A92.3, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.