Michael O Sullivan, M.D., a former member of the Mayo Clinic Board of Governors, CEO of Mayo Clinic in Arizona, and the founding medical director of Mayo Medical Laboratories (now Mayo
Michael B. O’Sullivan, M.D., age 88, passed away peacefully at Charter House in Rochester, MN, on April 20, 2024. The sixth of seven children, he was born to Nora (née Ahern) and Mícheál Ó’Súilleabháin on August 20, 1935, in Tralee, Co. Kerry, Ireland. His upbringing in Listowel instilled a lifelong love of learning, a strong work ethic, a competitive spirit, an appreciation of music as the universal uniter, and a steadfast pride in his Irish heritage.