A83.4Billable
Australian encephalitis
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- A83
- Effective date
- October 1, 2026
Related codes in category A83
A83Mosquito-borne viral encephalitisA83.0Japanese encephalitisYesA83.1Western equine encephalitisYesA83.2Eastern equine encephalitisYesA83.3St Louis encephalitisYesA83.5California encephalitisYesA83.6Rocio virus diseaseYesA83.8Other mosquito-borne viral encephalitisYesA83.9Mosquito-borne viral encephalitis, unspecifiedYes
Frequently asked questions
What is ICD-10 code A83.4?
A83.4 is an ICD-10-CM diagnosis code for Australian encephalitis.
Is A83.4 a billable code?
Yes. A83.4 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is A83.4 in?
A83.4 falls under Chapter 1: Certain infectious and parasitic diseases.
When did A83.4 become effective?
A83.4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to A83.4?
A83.4 belongs to category A83, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.