It also can go the other way. I was once quoted two prices for a CT scan because they weren't sure if my insurance would cover it. If it did, they'd bill one amount to the insurance company. If they didn't cover it, I would be billed directly for an amount that was somewhere around double what the insurance would have been billed.
Insurance companies negotiate down prices so the hospitals jack up the sticker prices to give room for negotiation. I've read that hospitals typically get 20-30% of what they bill.
I got the CT scan somewhere else.