A84.1 – Central European tick-borne encephalitis

ICD-10-CM 2027 diagnosis code · Viral and prion infections of the central nervous system

Billable code

ICD-10-CM code A84.1

Code: A84.1 (claims format: A841)
Description: Central European tick-borne encephalitis
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: A80-A89 Viral and prion infections of the central nervous system
Parent codes: A84

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

A84 – Tick-borne viral encephalitis

Includes:

tick-borne viral meningoencephalitis

Block A80-A89

Excludes1 (not coded here):

postpolio syndrome (G14)
sequelae of poliomyelitis (B91)
sequelae of viral encephalitis (B94.1)

Index terms for A84.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in A84

Frequently asked questions

What is ICD-10 code A84.1?

A84.1 is the ICD-10-CM code for central European tick-borne encephalitis, in the block A80-A89 (Viral and prion infections of the central nervous system).

Is A84.1 a billable code?

Yes. A84.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does A84.1 belong to?

It belongs to category A84 – Tick-borne viral encephalitis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.