A83.9
BillableMosquito-borne viral encephalitis, unspecified
Mosquito-borne viral encephalitis, unspecified
Coding Notes
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
- mosquito-borne viral meningoencephalitis
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •postpolio syndromeG14
- •sequelae of poliomyelitisB91
- •sequelae of viral encephalitisB94.1
Excludes 2
Conditions not included here, but the patient may have both
- •carrier or suspected carrier of infectious diseaseZ22
- •infectious and parasitic diseases complicating pregnancy, childbirth and the puerperiumO98
- •infectious and parasitic diseases specific to the perinatal periodP35-P39
- •influenza and other acute respiratory infectionsJ00-J22
- •Venezuelan equine encephalitisA92.2
- •West Nile feverA92.3
- •West Nile virusA92.3
Use Additional Code
Additional codes that should follow this code
Related Codes(8)
A83.0Japanese encephalitis
A83.1Western equine encephalitis
A83.2Eastern equine encephalitis
A83.3St Louis encephalitis
A83.4Australian encephalitis
A83.5California encephalitis
A83.6Rocio virus disease
A83.8Other mosquito-borne viral encephalitis
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(23)
UMLS
- ENCEPH MOSQUITO BORNEC0751098
- Encephalitis, Mosquito BorneC0751098
- Encephalitis, Mosquito-BorneC0751098
- MOSQUITO BORNE ENCEPHC0751098
- Mosquito Borne EncephalitisC0751098
- Mosquito-Borne EncephalitidesC0751098
- Mosquito-Borne EncephalitisC0751098
- Mosquito-Borne Viral EncephalitisC0751098
- Mosquito-borne encephalitisC0751098
- Mosquito-borne viral encephalitisC0751098
- Mosquito-borne viral encephalitis (navigational concept)C0751098
- Mosquito-borne viral encephalitis, unspecifiedC0751098
- encephalitis mosquito-borneC0751098
- mosquito-borne encephalitisC0751098
Clinical Terms
- Mosquito-borne viral encephalitis (navigational concept)
- mosquito-borne encephalitis
- Encephalitis, Mosquito Borne
- encephalitis mosquito-borne
- Mosquito-Borne Encephalitides
- Encephalitis, Mosquito-Borne
- MOSQUITO BORNE ENCEPH
- Mosquito Borne Encephalitis
- ENCEPH MOSQUITO BORNE
Frequently Asked Questions
What is the ICD-10 code for mosquito-borne viral encephalitis, unspecified?
The ICD-10-CM code for mosquito-borne viral encephalitis, unspecified is A83.9. The full clinical description is "Mosquito-borne viral encephalitis, unspecified". A83.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A83.9 mean?
ICD-10-CM code A83.9 represents “Mosquito-borne viral encephalitis, unspecified”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A83.9 a billable code?
Yes, A83.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A83.9 in?
A83.9 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A83.9?
A83.9 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; postpolio syndrome (G14); sequelae of poliomyelitis (B91); and 1 more.
Are additional codes required with A83.9?
Yes, when using A83.9, also report: resistance to antimicrobial drugs (Z16.-).
What are the UMLS CUIs for A83.9?
A83.9 is linked to 1 UMLS Concept Unique Identifier: C0751098. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A83.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like mosquito-borne viral encephalitis, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A83.9?
A83.9 maps to the ICD-11 code: 1C8Z (Viral infections of the central nervous system, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.