There were 700,100 hospital stays for knee replacements in 2012. Knee replacement was the most frequently performed hospital operating room procedure for patients covered by Medicare and by private insurance. (Source: Agency for Healthcare Research and Quality, Healthcare Cost and Utilization Project Statistical Brief #186, Most Frequent Operating Room Procedures Performed in U.S. Hospitals, 2003-2012.)
Kathryn R. Fingar, Ph.D., M.P.H., Carol Stocks, Ph.D., R.N., Audrey J. Weiss, Ph.D., and Claudia A. Steiner, M.D., M.P.H.