A83.9 Mosquito-borne viral encephalitis, unspecified
Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.
Applies from A83 Mosquito-borne viral encephalitis
Includes
- mosquito-borne viral meningoencephalitis
Excludes2 (not included here)
- Venezuelan equine encephalitis (A92.2)
- West Nile fever (A92.3-)
- West Nile virus (A92.3-)
MS-DRG index
Defines the logic of DRG(s) 023-024 in MDC 01.
Approximate ICD-9-CM (GEMs)
062.9 Mosquito-borne viral encephalitis, unspecified
Diagnosis Index entries for A83.9
- Borna disease
- Disease, diseased › Borna
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › equine (acute) (infectious) (viral)
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › viral, virus › arthropod-borne NEC › mosquito-borne
- Encephalomyelitis › equine
Nearby codes
A83.3 St Louis encephalitisA83.4 Australian encephalitisA83.5 California encephalitisA83.6 Rocio virus diseaseA83.8 Other mosquito-borne viral encephalitisA83.9 Mosquito-borne viral encephalitis, unspecified (this code)