A85.8

What This Code Means

This code describes inflammation of the brain caused by a virus that is not one of the more common types (like West Nile virus or herpes). It is used when the specific viral cause has been identified but doesn't fit into other standard categories.

Coding Tips

• •Always verify the specific viral agent documented in the medical record and use more specific codes (A80-A87) when available, as A85.8 is reserved for 'other' viral encephalitis cases
• •Ensure the documentation clearly states 'encephalitis' (brain inflammation) rather than meningitis or other CNS conditions, and confirm viral etiology is established before coding