A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
✓ Billable
ICD-10-CM 2026
The ICD-10-CM code for Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis] is A84.0 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- A80-A89: Viral and prion infections of the central nervous system (A80-A89)
- Category A84
- 7 codes (5 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to A84.0:
- Russian spring-summer type encephalitis
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › Far Eastern (tick-borne)
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › Russian › spring-summer (taiga)
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › viral, virus › arthropod-borne NEC › tick-borne › Far Eastern
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › viral, virus › arthropod-borne NEC › tick-borne › Russian spring-summer (taiga)
Official Coding Guidelines
HIV Infections (TOC entry)a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19
Infectious agents causing diseases in other chapters (TOC)b. Infectious agents as the cause of diseases classified to other chapters ................................. 22
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026