Homer Richards Warner (April 18, 1922 – November 30, 2012) was an American cardiologist who was an early proponent of medical informatics who pioneered many aspects of computer applications to medicine. Author of the book, Computer-Assisted Medical Decision-Making, published in 1979, he served as CIO for the University of Utah Health Sciences Center, as president of the American College of Medical Informatics (where an award has been created in his honor), and was actively involved with the National Institutes of Health. He was first chair of the Department of Medical Informatics at the University of Utah School of Medicine, the first American medical program to formally offer a degree in medical informatics.