A85Header code — not billable

Other viral encephalitis, not elsewhere classified

Chapter
1. Certain infectious and parasitic diseases
Category
A85
Effective date
October 1, 2026

Related codes in category A85

A85.0Enteroviral encephalitisYesA85.1Adenoviral encephalitisYesA85.2Arthropod-borne viral encephalitis, unspecifiedYesA85.8Other specified viral encephalitisYes

Frequently asked questions

What is ICD-10 code A85?

A85 is an ICD-10-CM diagnosis code for Other viral encephalitis, not elsewhere classified.

Is A85 a billable code?

No. A85 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is A85 in?

A85 falls under Chapter 1: Certain infectious and parasitic diseases.

When did A85 become effective?

A85 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to A85?

A85 belongs to category A85, which includes 4 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.