The problem is the predatory billing practices of medical providers. A routine check up shouldn't be billed at $500 or more yet they are. Those check ups should be billed at close to what the co pay is for them. That is the purpose of that co pay.
The irritating truth is that they're billed that way because there's a middle man that needs their cut.
The insurance plan will only "cover" (notice I didn't type "pay" here) $X towards Y (your procedure or line item). You pay the rest of the gross charge for Y. These costs plus your co-pays and premiums added together go towards your deductible. Yall know what happens when you reach your deductible.
What you may NOT know if that the insurance company doesn't automatically pay the portion of X that they "cover" in your plan. They have the option to still negotiate with the provider to pay less than that, and not pass any savings on to you.
So if your service cost $10,000 (for say a 1 hr trip to the hospital ER), insurance may require a copay of $75 that day,
-and then from $225-2,925, to be collected later... which you pay.
-The insurance company can and will negotiate the remaining bill, and may wind up paying only $500 - $2000 for the trip to the ER, while you've come out of pocket up to $3k (plus your premiums).
Something that could have been billed at only $500-$2500 has to be billed at 10k for the hospital to get its minimum met in order for it to make a still obscene profit.