The Leapfrog Group, a national nonprofit health care ratings organization, recently released new Leapfrog Hospital Safety Grades. The Safety Grade assigns letter grades of A, B, C, D and F to hospitals nationwide based on their performance in preventing medical errors, infections and other harms. Dignity Health - St. Joseph's Medical Center was one of 832 awarded an "A" for its commitment to keeping patients safe and meeting the highest safety standards in the U.S.