Final answer:
The payment system used for Mr. Cooper after being admitted to the hospital due to surgery complications is the Inpatient Prospective Payment System (IPPS). This system applies fixed payments based on diagnosis-related groups, contrasting with the Outpatient Prospective Payment System initially used for his surgery.
Step-by-step explanation:
If Mr. Cooper was initially in outpatient surgery and then had to be admitted to the hospital due to a complication that occurred during surgery, the Inpatient Prospective Payment System (IPPS) would be used. Under IPPS, hospitals are paid a fixed amount based on the average costs associated with a patient's diagnosis-related group (DRG). Since he was admitted as an inpatient after complications, his billing would transition from the Outpatient Prospective Payment System (OPPS) which covers outpatient services, such as the initial surgery, to IPPS, which covers inpatient stays.
It is important to note that if a patient has Medicare Part A, it may cover some of the hospital charges, being funded by payroll deductions and employer contributions. However, patients are responsible for a deductible and copayments for many hospital-related services, with no limit on the total costs they can incur.