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 A83.0

2023 ICD-10-CM Diagnosis Code A83.0

Japanese encephalitis

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• A83.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM A83.0 became effective on October 1, 2022.
• This is the American ICD-10-CM version of A83.0 - other international versions of ICD-10 A83.0 may differ.

• Japanese encephalitis virus disease

• A mosquito-borne encephalitis caused by the japanese b encephalitis virus (encephalitis virus, japanese) occurring throughout eastern Asia and australia. The majority of infections occur in children and are subclinical or have features limited to transient fever and gastrointestinal symptoms. Inflammation of the brain, spinal cord, and meninges may occur and lead to transient or permanent neurologic deficits (including a poliomyelitis-like presentation); seizures; coma; and death. (from Adams et al., Principles of Neurology, 6th ed, p751; lancet 1998 apr 11;351(9109):1094-7)
• Viral encephalitis caused by the mosquito-born japanese encephalitis virus. Signs and symptoms include an initial period of fever, headaches, and malaise, followed by neck rigidity, hemiparesis, and convulsions. It may lead to coma.

• 023 Craniotomy with major device implant or acute complex cns principal diagnosis with mcc or chemotherapy implant or epilepsy with neurostimulator
• 024 Craniotomy with major device implant or acute complex cns principal diagnosis without mcc
• 097 Non-bacterial infection of nervous system except viral meningitis with mcc
• 098 Non-bacterial infection of nervous system except viral meningitis with cc
• 099 Non-bacterial infection of nervous system except viral meningitis without cc/mcc

Convert A83.0 to ICD-9-CM

• 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

• Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
  ICD-10-CM Diagnosis Code G04.90

  Encephalitis and encephalomyelitis, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Ventriculitis (cerebral) NOS
  • Russian
    • autumnal A83.0
  • type
    • B A83.0
  • viral, virus A86
    ICD-10-CM Diagnosis Code A86

    Unspecified viral encephalitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS
    • arthropod-borne NEC A85.2
      ICD-10-CM Diagnosis Code A85.2

      Arthropod-borne viral encephalitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Type 1 Excludes

      • West nile virus with encephalitis (A92.31)
      • mosquito-borne A83.9
        ICD-10-CM Diagnosis Code A83.9

        Mosquito-borne viral encephalitis, unspecified

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        • Japanese A83.0 (B type)
        • type B A83.0
  • Japanese A83.0 (B type)
  • summer A83.0
• Infection, infected, infective (opportunistic) B99.9
  ICD-10-CM Diagnosis Code B99.9

  Unspecified infectious disease

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Japanese B encephalitis A83.0
• Japanese
  • B-type encephalitis A83.0

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