bulk billing
The practice of charging the costs of a patient's care by a general practitioner, hospital, or other health service provider to Medicare, the Australian government's universal health insurance system. Primarily heard in Australia. Recent legislation is aimed at introducing a mandatory co-pay for all bulk billing by GPs and hospitals.
top billing
1. On a theatrical poster or playbill, the place at the top where a star's name is listed. I know you're disappointed, but Anita is a bigger star than you, so she gets top billing.
2. By extension, a position of prominence or recognition. You did the most work on this report, so you should get top billing on the cover.