WASHINGTON, Nov. 28, 2012 /PRNewswire-USNewswire/ -- The latest update to the Hospital Safety Score(SM), the A, B, C, D or F scores assigned to U.S. hospitals based on preventable medical errors, injuries, accidents, and infections, shows that hospitals are making some progress, but many still have a long way to go to reliably deliver safe health care. For the first time, the Hospital Safety Score now identifies "D" and "F" hospitals that represent the most hazardous environments for patients in need of care. The Hospital Safety Score was compiled under the guidance of the nation's leading experts on patient safety, and administered by the independent, national nonprofit organization The Leapfrog Group (Leapfrog). Today's Hospital Safety Score update accounts for the data updated over the last six months, most covering hospital performance in 2011, and uses a modified methodology based on research and public comments. (Logo: http://photos.prnewswire.com/prnh/20090818/LEAPFROGLOGO) "Everybody has a role in improving this terrible problem with safety in American hospitals," says Leah Binder, president and CEO of The Leapfrog Group, which administers the Hospital Safety Score. "Consumers, patients, families of patients, employers, unions, and hospitals themselves can all make a difference if we resolve here and now to make patient safety a national priority." At least 180,000 people are killed every year from errors, accidents, injuries, and infections in American hospitals. While there are several other hospital ratings in the market – many of which use Leapfrog data for their calculations – the Hospital Safety Score is unique in that it is offered free to the public, along with a full analysis of the data and methodology used to calculate each individual hospital's Hospital Safety Score. The Hospital Safety Score relies on the advice of the nation's foremost patient safety experts, whose participation is a voluntary contribution to Leapfrog's nonprofit mission.