2023

  1. ICD-10-CM Codes
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  2. A00-B99
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  3. A80-A89
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  4. A83-
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  5. 2023 ICD-10-CM Diagnosis Code A83

2023 ICD-10-CM Diagnosis Code A83

Mosquito-borne viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
  • A83 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2023 edition of ICD-10-CM A83 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of A83 - other international versions of ICD-10 A83 may differ.
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (A83) and the excluded code together.
  • Venezuelan equine encephalitis (
    ICD-10-CM Diagnosis Code A92.2

    Venezuelan equine fever

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Venezuelan equine encephalitis
    • Venezuelan equine encephalomyelitis virus disease
    A92.2
    )
  • West Nile fever (
    ICD-10-CM Diagnosis Code A92.3

    West Nile virus infection

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • West Nile fever
    A92.3-
    )
  • West Nile virus (
    ICD-10-CM Diagnosis Code A92.3

    West Nile virus infection

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • West Nile fever
    A92.3-
    )
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • mosquito-borne viral meningoencephalitis
The following code(s) above A83 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A83:
  • A00-B99
    2023 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • 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.-)
    Certain infectious and parasitic diseases
  • A80-A89
    2023 ICD-10-CM Range A80-A89

    Viral and prion infections of the central nervous system

    Type 1 Excludes
    • postpolio syndrome (G14)
    • sequelae of poliomyelitis (B91)
    • sequelae of viral encephalitis (B94.1)
    Viral and prion infections of the central nervous system
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
ICD-10-CM Codes Adjacent To A83
A81.8 Other atypical virus infections of central nervous system
A81.81 Kuru
A81.82 Gerstmann-Sträussler-Scheinker syndrome
A81.83 Fatal familial insomnia
A81.89 Other atypical virus infections of central nervous system
A81.9 Atypical virus infection of central nervous system, unspecified
A82 Rabies
A82.0 Sylvatic rabies
A82.1 Urban rabies
A82.9 Rabies, unspecified
A83 Mosquito-borne viral encephalitis
A83.0 Japanese encephalitis
A83.1 Western equine encephalitis
A83.2 Eastern equine encephalitis
A83.3 St Louis encephalitis
A83.4 Australian encephalitis
A83.5 California encephalitis
A83.6 Rocio virus disease
A83.8 Other mosquito-borne viral encephalitis
A83.9 Mosquito-borne viral encephalitis, unspecified
A84 Tick-borne viral encephalitis

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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