Diana Mandelker and Todd Levy were married Nov. 1 at Crest Hollow Country Club in Woodbury, with a reception following. She is a third-year medical student at Johns Hopkins School of Medicine and is the daughter of Barbara and Martin Mandelker of East Northport. The bridegroom is an electrical engineer for Johns Hopkins Applied Physics Lab and is the son of Donna Levy of Peoria, Ariz., and the late Garry Levy. The bride earned bachelor's and master's degrees in molecular biophysics and biochemistry from Yale University and a doctorate in human genetics from Johns Hopkins University. The bridegroom earned bachelor's and master's degrees in electrical engineering from Case Western Reserve University. They live in Maryland.