It is estimated that up to thirteen percent of hospital admissions result from the adverse effects of diagnosis or treatment, and that anywhere from 44,000 to 98,000 hospital deaths annually are the result of errors. The obligation to "do no harm" has been central to medical conduct since ancient times, yet iatrogenic illness and medical error have now come to be recognized as significant risk factors in health care delivery. This book integrates history, philosophy, medical ethics and empirical data to examine the concept and phenomenon of medical harm. Issues covered include medical error, appropriateness of care, acceptable risk and practitioner accountability, and recommendations for limiting iatrogenic harm.