Every single one of them* and 99% of all medical costs.
When you hear people getting $100,000 hospital bills because they shoved a pool ball up their ass, that is because the hospitals have bill you what they bill insurance, and they bill insurance a made up number that includes a distributed load of all their operating expenses to cover for methheads who can't/won't pay.
If you get a medical bill, ask to speak to financial aid. Just showing up in the financial aid office will get 25% knocked off your bill before you even start.
Then ask for an itemized bill. This is where there is a lot of double billing and "well we don't have to charge for that" will knock that shit down even more, as they are dealing with an actual human and not an insurance adjuster who will approve anything within what their system says something should cost.
Want to get that shit even lower? Offer to pay in cash or debit card.
Want to pay amounts that you'll swear is the result of someone fucking up and leaving off a zero? Pay in cash before you have a procedure.
My friend and his wife paid less than the insurance deductible for the birth of their kid by going to the hospital administration when they were pregnant and paying upfront for the delivery.
Remember Skrelli and his epipen shit? That's why he marked epipens to $600 a unit, it was to gouge insurers. His only fuck up was not creating the personal exception program all the other drug companies run to avoid that exact fiasco.
* Ok, There are some extreme, extreme fringe cases where the $5000/mo is $5000/mo because what the drug treats is so uncommon there isn't actually a production line so batches have be cooked up by hand by a bunnysuited labtech. But in those cases you just get the nightly news involved and the drug company will happily write down the cost of keeping you alive because they don't want the PR nightmare.