United States 5-cent postage stamp titled 'Doctors Mayo' issued 1964

This commemorative stamp was issued by the United States Postal Service on September 11, 1964, to honor Dr. William James Mayo and Dr. Charles Horace Mayo, founders of the world-renowned Mayo Clinic in Rochester, Minnesota. The stamp features a portrait of the two pioneering surgeons who revolutionized medical practice and education in America during the late 19th and early 20th centuries. The Mayo brothers established their clinic in 1889, creating the first integrated group practice of medicine and setting standards for collaborative healthcare that persist today. This stamp appeals to philatelists specializing in American commemorative issues, medical history enthusiasts, and collectors of healthcare-related memorabilia. The Doctors Mayo stamp represents an important piece of American medical heritage and is valued for its historical significance in honoring two figures who transformed modern medicine. Collectors of topical stamps focusing on famous Americans, medical pioneers, or mid-20th century U.S. postal issues find this stamp particularly desirable for its clean design and cultural importance.