The Blue Cross Blue Shield Association (BCBSA) is highlighting the variations in cost for hip and knee replacement surgery at U.S hospitals as part of an effort to encourage more issuers to empower patient decision-making by improving transparency on price and quality. Some U.S. hospitals charge tens of thousands of dollars more than others do for the same knee and hip replacements, now two of the country's fastest-growing medical treatments, according to a new study released Wednesday (Jan. 21) by...