The chargemaster may be alternatively referred to as the "charge master", "hospital chargemaster", or the "charge description master" (CDM). It is a comprehensive listing of items billable to a
hospital patient or a patient's
health insurance provider. Chargemasters include thousands of hospital services,
medical procedures, equipment fees, drugs, supplies, and diagnostic evaluations such as imaging and
blood tests. Traditionally, hospitals regarded their chargemaster, alongside the
medical codes that catalogue the billing items, as a
trade secret that is central to their business, and state laws and courts have historically accepted the view that these are proprietary information. The procedure of developing, maintaining, and monitoring the chargemaster and its pricing scheme often necessitates multiple hospital employees working under the supervision of a "chargemaster coordinator", compliance officer, and hospital Board. Approximately forty percent of hospitals pay outside companies to help create and then adapt their chargemasters on a yearly basis. According to
Essentials of Managed Health Care, as of 2012 the chargemaster file typically included between 20,000 and 50,000 price definitions. The
Lewin Group analyzed utilization of the chargemaster and found that a low proportion of hospitals carried out regular reviews of their chargemaster implementation. Costs for patients maintained on the chargemaster differ greatly from hospital to hospital. Authors
J. Patrick Rooney and Dan Perrin note in their book ''
America's Health Care Crisis Solved'', "Charge-master rates, in reality, serve as nothing more than the starting point for negotiations" with the payer. The impact of the chargemaster is such that those with good insurance or better access to means to afford quality healthcare pay the least for that care, whereas conversely uninsured, and others who pay out-of-pocket for healthcare pay the full chargemaster listed price for the same services. ==Existing legislation and regulations==