It’s not just Medicare. All medical billing seems to look like that. When I was an employed, working, useful member of society, I had various medical insurance plans over the years, usually employee sponsored. The bills from providers all looked like that.
When doctors and other providers agree to accept one insurance plan or another, they enter into a contract with the insurance company. The contract specifies all the procedures known to medical science, and which of them are covered and which aren’t, and how much the insurance will pay for each.
The providers then submit bills that are orders of magnitude more than the insurers will ever pay, presumably knowing what they can expect to get. The insurance contract also specifies how much the patient can be required to pay for each procedure (the co-pay), or how much the patient can be billed overall each year (the deductible).
The contract usually also specifies what percent of the bill the patient must pay – for example, the insurer pays 70% of the bill and the patient pays the remaining 30%. As far as I’ve ever been able to tell, this is substantially bogus.
Rather, it seems to work like this:
You get a hangnail, and the doctor orders an x-ray before fixing it. Then the radiologist interprets the x-ray and writes his report, then the doctor clips your hangnail. The hospital bills $12000 for the x-ray (covers the technicians salary and the cost of using the equipment), the radiologist bills $8000 for reading the x-ray (covers his time and expertise), then your Primary Care Physician (PCP) bills $125 for clipping your fingernail.
But the contract says that such an x-ray may only be charged $250, the radiologist may only charge $75, and your PCP may only charge $15 for all these particular procedures. These, then, are the amounts of which the insurance will pay 70% and you must pay 30%.
Thus, you, the patient, save money in two ways: First, the MAJOR saving is that the insurance contract only allows the providers to bill relatively small amounts for everything – commonly, MUCH less than the providers actually bill. Second, once that limit is applied, you only have to pay your 30% of the allowed amount.
When you visit a doctor, they commonly require you to sign an agreement that you are responsible for paying any amount of the bill above the amount the insurance will pay. And yet, when they bill $12000 and the insurance only pays $250, you are never required to pay the entire remaining amount. The providers’ contract with the insurance company forbids that.
So how can providers stay in business? Apparently, the frugal amounts that the insurers agree to pay is, in fact, enough for the providers to make a living and stay in business, although NOT enough for doctors to get rich and live the opulent lifestyles as the stereotype is commonly envisioned.
So why do doctors and other providers bill such arbitrary, capricious, and exorbitant amounts? Damfino. Could it be as @Dereknocue67 speculates, that they can take that as a tax writeoff?
The big losers, of course, are the uninsured patients. These are the ones who get those full outlandish bills, with no insurance company to tell the providers how much they may bill, and no insurance company to pay the 70% of whatever they bill. These are the people who may be driven into bankruptcy by medical bills. Providers can commonly be negotiated with to lower their bills, but only so much, and uninsured patients still end up having massive bills to pay, or massive debts.