So why would you need anything else?
Medicare doesn't cover all costs you might incur due to a medical event, such as the cost of an ambulance. If you have an emergency it can be up to $6,500 in New South Wales and $1,800 in Victoria.
You may also have to wait for treatment if you use the public health system. For example, if you bung your knee doing your home workout, say, and you need to see a specialist for surgery you'll be in the queue. You also won't be able to choose your specialist.
Medicare doesn't cover things like glasses, contact lenses, hearing aids or therapies such as remedial massage either.