I guess it can vary depending on your location, hospital, and type of insurance. Either way, it's expensive. My first time in 2011 cost about $3,000 a day when I had Aetna PP0 through my employer with COBRA continuation, and all was covered. Last year with Medicare, at the same hospital, it cost around $2,000 a day, and luckily I have a Medicare Supplemental Plan, otherwise I would have been charged 20% of that, so there was no out of pocket expenses
Good Luck.