Can a medical practice registered as a Unit Trust charge a user fee to patients along with the doctors' fees, if the doctor does not bulk bill that visit.

e.g. For an initial visit with an Obstetrician, the Obstetrician charges $200, and the patient can claim about $78 from Medicare as rebate. Can the practice under its own name, charge $70 as user fee, i.e. Issue 2 invoices: 1 doctor's invoice for $200 with the correct Medicare Item number, and another invoice of $70 under the practice's name?