• Undergraduate: University of Maryland, B.S., 1973
• Medical: University of Maryland, M.D., 1977
• Internship/residency: Mercy Medical Center, Baltimore, MD, 1977-1980
• Nephrology fellowship: University of Maryland Hospital, 1984-1986
• Board Certified: Internal Medicine 1980, Nephrology 1986
• Private Practice: Nephrology Associates, P.A., 1987-1992
• Private Practice: Stephen M. Zemel, M.D., P.A., 1992-1998
• Private Practice: Nephrology Associates, P.A. 1998-1999
• Private Practice: Mid-Atlantic Nephrology Associates, P.A., 1999-present
• Chief of Nephrology: Northwest Hospital Center and Greater
• Baltimore Washington Medical Center
• Lead Medical Director: DaVita Pasadena Dialysis Center
• Medical Director: Ellicott City Dialysis Center
• Clinical Assistant Professor of Medicine: University of Maryland School of Medicine

Dr. Zemel is affiliated with BWMC and MedStar Harbor Hospital Center.