A86 UNSPECIFIED VIRAL ENCEPHALITIS

Code Information

  • Diagnosis Code: A86
  • Short Description: Unspecified viral encephalitis
  • Long Description: Unspecified viral encephalitis
  • Code Version: 2025 ICD-10-CM

The code A86 is VALID for claim submission

Code Classification

Synonyms

  • Acute encephalitis
  • Acute encephalitis
  • Acute necrotizing encephalitis
  • Acute viral encephalitis
  • Arenavirus encephalitis
  • Arenavirus meningitis
  • Chronic echovirus meningoencephalitis
  • Chronic infectious disease of central nervous system
  • Chronic infectious disease of central nervous system
  • Chronic meningitis
  • Chronic viral encephalitis
  • Dementia associated with viral encephalitis
  • Echovirus encephalitis
  • Epidemic encephalitis
  • Infection caused by Lymphocytic choriomeningitis virus
  • Infective ventriculitis
  • Lymphocytic choriomeningitis virus encephalitis
  • Meningitis caused by echovirus
  • Meningitis caused by Enterovirus
  • Meningitis caused by lymphocytic choriomeningitis virus
  • Meningoencephalitis caused by Lymphocytic choriomeningitis virus
  • Meningoencephalitis caused by virus
  • Meningoencephalitis caused by virus
  • Primary encephalitis
  • Primary viral encephalitis
  • Ventriculitis of the brain
  • Ventriculitis of the brain
  • Viral encephalitis
  • Viral ventriculitis

Diagnostic Related Group(s)

The code A86 is grouped in the following Diagnostic Related Group(s) MS-DRG V43.0

  1. Hiv With Major Related Condition With Mcc (974)
  2. Hiv With Major Related Condition With Cc (975)
  3. Hiv With Major Related Condition Without Cc/mcc (976)

References to Index of Diseases and Injuries

The code A86 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Inclusion Terms:
    • Viral encephalomyelitis NOS
    • Viral meningoencephalitis NOS

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
A86 Right Arrow 049.9 Viral encephalitis NOS
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
This page was last updated on: 10/1/2025