Wiktionary
n. (context Australia idiomatic English) The process whereby a general practitioner or other medical service provider charges the government for medical expenses incurred by a patient. vb. (present participle of bulk bill English)
Wikipedia
Bulk billing is a payment option under the Medicare system of universal health insurance in Australia. It can cover a prescribed range of health services as listed in the Medicare Benefits Schedule, at the discretion of the health service provider. The health service provider - usually a doctor - is paid 85% of the scheduled fee for outpatient services; and 75% of the scheduled fee for inpatient services, by billing the government via the patient's Medicare card. The service provider receives a fixed proportion of the scheduled fee but avoids the costs and risks of billing and debt collection. It could be described as a form of factoring.
Bulk billing rebates may be collected and paid directly to the service provider, or the service provider may collect the equivalent fee from the patient; leaving the patient to claim the rebate online, over the telephone, by mail, or at a Medicare office. Increasingly, service providers offer electronic lodgement at the practice using EFTPOS.
Under Medicare, it is not permissible to charge the patient a co-payment with bulk billing (although this was previously permissible): a service provider who bulk bills for a service may not charge the patient further for that service.
Service providers may choose whether or not to use bulk billing. Many general practitioner services are bulk-billed, but less so in more affluent areas and in rural, regional and remote areas of Australia where there is a greater shortage of doctors and health care services. The key purpose of bulk billing is to provide an economic constraint on medical fees and charges.