Michelis has been Director of the Division of Nephrology at Lenox Hill Hospital for more than three decades. He is Clinical Professor of Medicine at the New York University School of Medicine. Dr. Michelis received a B.A. at Columbia College, Columbia University in New York City, and his M.D. degree at George Washington School of Medicine in Washington, D.C. He received his nephrology training at the University of Pittsburgh School of Medicine. Dr. Michelis has been selected for inclusion in the listing of top doctors in New York for the past several years. He is the co-Editor of several medical textbooks, and he has published dozens of articles in the area of general nephrology, electrolyte disorders, hypertension, and geriatric renal disease. He has lectured extensively throughout the United States, Hawaii, Japan, and in various European cities. He has served on the editorial board of several medical journals, and he also reviews articles for established journals in nephrology. He has received many awards and lectureships for his work in nephrology.