A86
A86: Unspecified viral encephalitis
Billable / specific codeICD-10-CM
A86 is a billable, specific ICD-10-CM code for unspecified viral encephalitis. It is valid for submission on a claim.
Check A86 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Viral encephalomyelitis NOS
- Viral meningoencephalitis NOS
Other codes that can never be billed with A86
Their own Excludes1 notes name this code, so the conflict is not listed above.
- A88Other viral infections of central nervous system, not elsewhere classified
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
A86 is named in 5 Medicare coverage policies: 5 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56612Billing and Coding: CT of the Head
- A58710Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
- A58720Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
- A58747Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
Alphabetic index entries that lead here
- Encephalitis›acute
- Encephalitis›endemic(viral)
- Encephalitis›epidemic NEC(viral)
- Encephalitis›infectious NEC(acute) (virus)
- Encephalitis›postviral NEC
- Encephalitis›viral, virus
- Meningoencephalitis›acute NEC
- Meningoencephalitis›infectious(acute) (viral)
- Meningoencephalitis›virus NEC
- Meningoencephalomyelitis›acute NEC(viral)
Code history
Unchanged in every release from FY2024 to FY2027.