Bulk billing means there is no out-of-pocket cost for your medical visit.
If a practice bulk bills, the doctor bills Medicare directly for your consultation. The Medicare rebate covers the full cost of the visit, so you do not pay anything on the day.
Bulk billing is only available for certain services and is at the discretion of the practice and doctor. You must have a valid Medicare card and meet the eligibility rules for the service provided.
In simple terms: Medicare pays the doctor, and the patient pays nothing.