You essentially cannot, in the United States, get a group of doctors together to form a hospital as of the passage of Obama's healthcare reform act. (Technically, you can, but that facility cannot become Medicare certified, which is usually a death knell.) [1]
The real question is why new hospitals don't open up and charge less than these hyper-inflated retail rates and compete on price?
I'm only on page 3, maybe that's addressed too - but I doubt it.