A84.89
Billable codeOther tick-borne viral encephalitis
The ICD-10 code for other tick-borne viral encephalitis is A84.89.
Clinical notes
Code first
This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.
- , if applicable, transfusion related infection (T80.22-)
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Louping ill
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- A84.81Powassan virus disease
- A84.89Other tick-borne viral encephalitis
Associated MS-DRGs
A84.89 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 023Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator
- DRG 024Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC
- DRG 097Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCC
- DRG 098Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC
- DRG 099Non-Bacterial Infection of Nervous System Except Viral Meningitis without CC/MCC