A85
Non-billableOther viral encephalitis, not elsewhere classified
A85 is the ICD-10-CM code for Other viral encephalitis, not elsewhere classified. It is a non-billable category code — use a more specific child code such as A85.0 for billing.
- Status
- Header (non-billable)
- Chapter
- A00-B99
- Subcodes
- 4
- Edition
- FY2026
A00-B99 Certain infectious and parasitic diseases
What this means — in plain language
MedlinePlus · NIHWhat is encephalitis? Encephalitis is inflammation (swelling) of the brain. It can happen when an infection or medical condition that affects the brain activates your immune system. The inflammation can cause a wide range of symptoms. In extreme cases, it can lead to brain damage, stroke , or even death. What causes encephalitis? There are different types of encephalitis, based on what the cause is. The two main…
Read more about Encephalitis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •specified viral encephalomyelitis NEC
- •specified viral meningoencephalitis NEC
Excludes1 — not coded here
- •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)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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