Dr. Gelbfish is an assistant clinical professor at the Mount Sinai School of Medicine in New York and specializes in vascular access for hemodialysis. He has innovated, published and lectured widely in this subspecialty. He has several patents and brought to market an FDA approved thrombectomy device. He has founded three free-standing outpatient surgical centers in New York City and Boston. Dr. Gelbfish serves on the board of Cormedix, a publicly held pharmaceutical company.