A85.2
A85.2: Arthropod-borne viral encephalitis, unspecified
Billable / specific codeICD-10-CM
A85.2 is a billable, specific ICD-10-CM code for arthropod-borne viral encephalitis, unspecified. It is valid for submission on a claim.
Check A85.2 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- West nile virus with encephalitis (A92.31)
Excludes1 inherited from the categories above A85.2
A category’s note binds every code beneath it.
Written on A85: Other viral encephalitis, not elsewhere classified
- encephalitis due to cytomegalovirus (B25.8)
- encephalitis due to herpesvirus NEC (B10.0-)
- encephalitis due to herpesvirus [herpes simplex] (B00.4)
- encephalitis due to measles virus (B05.0)
- encephalitis due to mumps virus (B26.2)
- encephalitis due to poliomyelitis virus (A80.-)
- encephalitis due to zoster (B02.0)
- lymphocytic choriomeningitis (A87.2)
- myalgic encephalomyelitis (G93.32)
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
A85.2 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56612Billing and Coding: CT of the Head
- A56771Billing and Coding: Special Electroencephalography
- A56773Billing and Coding: Neurophysiology Evoked Potentials (NEPs)
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
Alphabetic index entries that lead here
- Encephalitis›arboviral, arbovirus NEC
- Encephalitis›arthropod-borne NEC(viral)
- Encephalitis›viral, virus›arthropod-borne NEC
Code history
Unchanged in every release from FY2024 to FY2027.