Charles Horace Mayo

Charles Horace Mayo (July 19, 1865 – May 26, 1939) was an American medical practitioner and was one of the founders of the Mayo Clinic along with his brother William James Mayo, Augustus Stinchfield, Christopher Graham, Edward Star Judd Jr., Henry Stanley Plummer, Melvin Millet, and Donald Balfour. Career Charles graduated with his M.D. from the medical school of Northwestern University in 1888 and after postgraduate studies at the New York Polyclinic Medical School joined his father, William Worrall Mayo, and older brother, William James Mayo, in their private medical practice in Rochester, Minnesota. The Mayos' first partner was Augustus Stinchfield, who was hired by William Worrall Mayo. Once in place as a partner in the private practice, W. W. Mayo retired at age 73. The private practice became the not-for-profit Mayo Clinic in 1919. At that point, the remaining partners went on salary, and the Mayo Properties Association was established. The world's first "integrated group practice" was established by the seven partners and staff. The Mayo Clinic came to be regarded as one of the foremost medical treatment and research institutions in the world. Within Mayo's lifetime, it registered one million patients.