Dr. Weinstein is a Phi Beta Kappa graduate of Brandeis University, Waltham, MA, where he majored in chemistry. After graduating from the New York University School of Medicine, New York, NY, he completed an internship and residency in Internal Medicine at the University of Miami Affiliated Hospitals program in Miami, Florida. He returned to New England as a fellow in hematology at the Beth Israel Hospital, Boston, where he stayed after completing his fellowship, as Assistant Professor of Medicine at Harvard Medical School.
In 1985 he joined the Division of Hematology/ Oncology at St. Elizabeth's Medical Center of Boston, a Tufts Medical School affiliate, where he established a program in therapeutic and donor apheresis. He later directed the Hematology and Transfusion Medicine section of the Division and became Professor of Medicine at Tufts.
In 2006 he established the Division of Transfusion Medicine at the UMass Memorial Medical Center, University of Massachusetts Medical School, Worcester, MA, where he is Professor of Medicine and Pathology.
Dr. Weinstein has served as chair of the Hemapheresis Committee of AABB and chair of the Committee on Practice of the American Society of Hematology. He is past-president of the American Society for Apheresis, and was elected president- elect of the World Apheresis Association at its 12th biennial Congress, March 2009, in Buenos Aires, Argentina. He is Editor-in-Chief of the Journal of Clinical Apheresis.