2024 ICD-10-CM Diagnosis Code A83.0

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Japanese encephalitis

  • A83.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM A83.0 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A83.0 – other international versions of ICD-10 A83.0 may differ.

The following code(s) above A83.0 contain annotation back-references

 that may be applicable to A83.0:

  • A00-B99  Certain infectious and parasitic diseases
  • A80-A89  Viral and prion infections of the central nervous system
  • A83  Mosquito-borne viral encephalitis

Approximate Synonyms

  • Japanese encephalitis virus disease

Clinical Information

  • 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.

ICD-10-CM A83.0 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 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-CMCode 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
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to A83.0: