As an international student you must obtain “Overseas Student Health Cover” (OSHC) which includes basic medical cover. This is only offered by government approved insurance companies below:

ahm OSHC Allianz Global Assistance (Peoplecare Health)BUPA AustraliaCBHS International Health Medibank PrivateNIB OSHC

Additionally, as OSHC is a basic cover, it does not cover costs for treatments such as dental, optical or physiotherapy. Therefore, you may decide to get additional coverage.