Einstein Experts


Norman Fleischer, M.D.

Norman Fleischer, M.D.

Professor, Medicine (Endocrinology), Einstein

Jacob A. and Jeanne E. Barkey Chair in Medicine, Einstein

Co-Director, Diabetes Research Center, Einstein

Chief, Endocrinology, Department of Medicine, Einstein and Montefiore Medical Center

EndocrinologyType 1 diabetes

Dr. Fleischer is a nationally recognized authority in diabetes treatment and research, with more than four decades of experience in the field. In the 1970s, he founded the NIH-funded Einstein’s Diabetes Research Center, which was among the first NIH-supported diabetes centers in the country. Today, it is one of only two such Centers in New York and one of only a dozen nationwide. read more...


Ruth Freeman, M.D.

Ruth Freeman, M.D.

Professor, Obstetrics & Gynecology and Women's Health (Reproductive Endocrinology and Infertility), Einstein

Professor, Medicine (Endocrinology), Einstein

Director, Menopause Research and Treatment Center, Montefiore Medical Center

Director, Bone Density Unit, Montefiore

EndocrinologyOsteoporosis Menopause

Hormone replacement therapyVitamin D deficiency

Dr. Freeman is a widely recognized authority on menopause, hormone replacement therapy, osteoporosis, and vitamin D deficiency. She is currently director of the Menopause Research and Treatment Center of the Bone Densitometry Unit at the Institute for Women’s Health at Montefiore Medical Center. She also serves on the editorial board of the journal Menopause. read more...


Jeffrey E. Pessin, Ph.D.

Jeffrey E. Pessin, Ph.D.

Professor, Medicine (Endocrinology)

Professor, Molecular Pharmacology

Director, Diabetes Research Center

Judy R. and Alfred A. Rosenberg Professorial Chair in Diabetes Research

DiabetesType 1 diabetesMetabolism

Dr. Pessin directs Einstein’s Diabetes Research Center, one of only sixteen NIH-funded diabetes centers of its kind in the country. He guides the research of more than 90 scientists investigating type 1 (formerly juvenile) and type 2 (formerly adult-onset) diabetes. The center also includes training programs and community-based activities in the Bronx. Dr. Pessin’s own research focuses on insulin signaling and the mechanisms contributing to the onset of type 1 diabetes. read more...