Sometimes the care that's supposed to help winds up hurting instead. iStockphoto.com hide caption toggle caption iStockphoto.com Shots - Health News How Many Die From Medical Mistakes In U.S. Hospitals? September 20, 2013 The number of people who die each year because of medical errors in hospitals may be twice as high as previously estimated. An analysis suggests that 210,000 or more people may suffer some type of preventable harm that contributes to their death.