Crossing the Quality Chasm: A New Health System for the 21st Century is report on health care quality in the United States published by the Institute of Medicine (IOM) on March 1, 2001. A follow-up to the frequently cited 1999 IOM patient safety report To Err is Human: Building a Safer Health System, Crossing the Quality Chasm advocates for a fundamental redesign of the U.S. health care system.