What is the average coast of total knee replacemet?

According to an article on costhelper.com (http://www.costhelper.com/cost/health/knee-replacement.html) dated March 2008, the cost for total knee replacement surgery runs about $35,000 for a patient with no insurance coverages. According to Zimmer Gender Knee Solutions (http://www.genderknee.com/micro/z/ctl/op/global/action/1/global/1/template/MN/navid/67/pid/60), the cost can vary according to which hospital performs the surgery and the type of materials used in the replacement. The Zimmer site also strongly suggests a visit to the potential hospital's accounting office to discuss the actual amount of your surgery and the potential out-of-pocket expense.