I asked them if the insurance price was the price billed to the insurance company or the negotiated price that actually gets paid. They could not give me a straight answer. I had them stay on the line while I added my insurance company to the call. The agent at the hospital communicated the necessary information to the insurance company (there's a ton of stuff that effects the price, down to which radiologist happens to be scheduled that day). And of course, the negotiated price for the insurance company was lower than the cash price the hospital was offering.
I really don't think this attempt at getting me to pay the cash price was some accidental mix up. I think someone at the business side has figured out not only can they convince people to pay a higher rate, but that then they don't need to deal with billing the insurance. A double savings. I wonder what percentage of people they successfully scam with these calls.
To anyone outside the US reading this who is really confused, I'll see if I can start a GoFundMe to explain the US healthcare system to foreigners