Dr. Feigenbaum received a B.A. (summa cum laude) in 1955 and his M.D. from the Indiana University School of Medicine in 1958. He interned at Philadelphia General Hospital and returned to IU Medical Center for his residency. He is the founding editor of the Journal of the American Society of Echocardiography and on the editorial board of numerous other medical journals. He is a Fellow of the American College of Physicians, American College of Cardiology, and the Council of Clinical Cardiology, American Heart Association. He is a member of the Central Society for Clinical Research, American Society of Clinical Investigation, Association of the American Physicians, and Founder and Past President of the American Society of Echocardiography.
A member of Phi Beta Kappa, his honors include the Texas Heart Institute Medal and Ray C. Fish Award for Outstanding Achievement in Cardiovascular Disease (1976); the Modern Medicine Award for Distinguished Achievement (1977); the Lewis A. Conner Lecture, American Heart Association (1977); Richard and Hinda Rosenthal Award, American Heart Association, Outstanding Achievement in Cardiovascular Research (1979); Distinguished Alumnus, IU School of Medicine (1980); Distinguished Alumnus, IU College of Arts and Sciences (1986); Tufts Award in Echocardiography, Tufts University School of Medicine (1986); Gifted Teacher Award, American College of Cardiology (1988); Robert J. And Claire Pasarow Foundation, Award for Excellence in Cardiovascular Medicine, Los Angeles, California (1989); Eugene Drake Memorial Award, American Heart Association (1992); Discovery Award in Science, Indiana Columbus Society (1992); Luminary Award for Scholarly Accomplishment in Science, Pisa, Italy (1997); Louis F. Bishop Lecture, American College of Cardiology (1998); World of Difference Lifetime Achievement Award from the Indiana Health Industry Forum (1998); included among the 20th Century's leading American innovators in Cardiovascular Disease at a Roche Exhibit at the 1998 American College of Cardiology and American Heart Association national meetings.
The Annual "Feigenbaum Lecture" was inaugurated at the 2000 annual meeting of the American Society of Echocardiography, and he was awarded the 2002 Cor vitae Award from the Midwest Affiliate of the American Heart Association. He received the Primio Mantevergine Award as "Father of Modern Echocardiography" in Naples, Italy in June 2004 and is the recipient of the Pioneer Award from Mayo Clinic for Development of Echocardiography at a 50th celebration meeting. He was awarded the 2005 Living Legend Award from Indiana Historical Society, the American Heart Association Distinguished Scientist, (November 2005), and International Honorary Member, Japanese College of Cardiology (September 2006).
Feigenbaum received the IU Bicentennial Medal in August 2020 in recognition of his distinguished contributions to Indiana University.