Diagnosis Code


Code Information

Diagnosis Code: A84.9

Short Description: Tick-borne viral encephalitis, unspecified

Long Description: Tick-borne viral encephalitis, unspecified

The code A84.9 is VALID for claim submission

Code Classification:

  • Certain infectious and parasitic diseases (A00–B99)
    • Viral and prion infections of the central nervous system (A80-A89)
      • Tick-borne viral encephalitis (A84)
        • A84.9 Tick-borne viral encephalitis, unspecified

Code Version: 2020 ICD-10-CM


  • Encephalitis caused by tick-borne encephalitis virus

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
A84.9 Right Arrow 063.9 Tick-borne enceph NOS
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
A84 Tick-borne viral encephalitis
A84.0 Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis]
A84.1 Central European tick-borne encephalitis
A84.8 Other tick-borne viral encephalitis

This page was last updated on: 10/1/2019