A86Billable
Unspecified viral encephalitis
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- A86
- Effective date
- October 1, 2026
Frequently asked questions
What is ICD-10 code A86?
A86 is an ICD-10-CM diagnosis code for Unspecified viral encephalitis.
Is A86 a billable code?
Yes. A86 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is A86 in?
A86 falls under Chapter 1: Certain infectious and parasitic diseases.
When did A86 become effective?
A86 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.