Emergency: 119
AMDA-IMIC

A84 Tick-borne viral encephalitis

Category / Non-billable header 6 subcodes

Block: Viral and prion infections of the central nervous system (A80-A89)

Includes

  • tick-borne viral meningoencephalitis

Subcodes

Each subcode links to a detail page with full clinical annotations.

Code Description Billable
A84..0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis] Yes
A84..1 Central European tick-borne encephalitis Yes
A84..8 Other tick-borne viral encephalitis No
A84..81 Powassan virus disease Yes
A84..89 Other tick-borne viral encephalitis Yes
A84..9 Tick-borne viral encephalitis, unspecified Yes

Last reviewed: September 2026