ICD-10 Code
International Classification of Diseases, 10th Revision
Mar 21, 2019

See: Unspecified viral encephalitis

  ICD-10 Code for Unspecified viral encephalitis A86

A86 is a valid1 ICD 10 diagnosis code.

A86 is valid for submission for HIPAA-covered transactions.

Chapter 1 Certain infectious and parasitic diseases (A00-B99)
Section A80-A89 Viral and prion infections of the central nervous system (A80-A89)
Category A86 Unspecified viral encephalitis

• See below for any additional coding requirements that may be necessary.

• Check for any notations, inclusions and/or exclusions that are specific to this ICD 10 code before using

1 No additional coding requirements necessary.
Inclusion Term
  • Viral encephalomyelitis NOS
  • Viral meningoencephalitis NOS

Related Terms to “Unspecified viral encephalitis”

  • Encephalitis(chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) - G04.90
    • acute - A86See also Encephalitis, viral
    • endemic(viral) - A86
    • epidemic NEC(viral) - A86
    • infectious NEC(acute) (virus) - A86
    • postviral NEC - A86
    • viral, virus - A86
  • Meningoencephalitis - G04.90See also Encephalitis
    • acute NEC - A86See also Encephalitis, viral
    • infectious(acute) (viral) - A86
    • virus NEC - A86
  • MeningoencephalomyelitisSee also Meningoencephalitis
    • acute NEC(viral) - A86
Back to A86
See the ICD-10-CM Coding Guidelines.

Questions related to A86 Unspecified viral encephalitis

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.