Nightmare stories of nurses giving potent drugs meant for one patient to another and surgeons removing the wrong body parts have dominated recent headlines about medical care. Lest you assume those cases are the exceptions, a new study by patient-safety researchers provides some context. Their analysis, published in the BMJ ... shows that "medical errors" in hospitals and other health-care facilities are incredibly common and may now be the third-leading cause of death in the United States claiming 251,000 lives every year, more than respiratory disease, accidents, stroke and Alzheimer's. Martin Makary, a professor of surgery at the Johns Hopkins University School of Medicine ... led the research. Makary's research involves a ... comprehensive analysis of four large studies, including ones by the Health and Human Services Department's Office of the Inspector General and the Agency for Healthcare Research and Quality that took place between 2000 to 2008. His calculation of 251,000 deaths equates to nearly 700 deaths a day " about 9.5 percent of all deaths annually in the United States. Although all providers extol patient safety and highlight the various safety committees and protocols they have in place, few provide the public with specifics on actual cases of harm due to mistakes. Moreover, the Centers for Disease Control and Prevention doesn't require reporting of errors in the data it collects about deaths through billing codes, making it hard to see what's going on at the national level.