Over the past 30 years, since institution of the DRG system for hospital reimbursement under the Medicare Inpatient Prospective Payment System (IPPS), hospitals would be marketed to by companies that had developed "the solution to all your problems" and would bring in experts to address maximizing Medicare reimbursement. Why? First of all, Medicare regulations indicate that hospitals should bill for all they are due in this system. They SHOULD optimize reimbursement.