Ten Things Your Hospital Won't Tell You:

(short list:)
1. "Oops, wrong kidney."
2. "You may leave sicker than when you came in."
3. "Good luck finding the person in charge."
4. "Everything is negotiable, even your hospital bill."
5. "Yes, we take your insurance -- but we're not sure about the anesthesiologist."
6. "Sometimes we bill you twice."
7. "All hospitals are not created equal."
8. "Most ERs are in need of some urgent care themselves."
9. "Avoid hospitals in July like the plague."
10. "Sometimes we don't keep our mouths zipped."

http://biz.yahoo.com/weekend/hospital2_1.html