The Mount Sinai Beth Israel Fellowship in Endocrinology and Metabolism is a two-year training program encompassing all aspects of endocrinology and metabolism. The Fellowship is based at the Milton and Carroll Petrie Division in Lower Manhattan; the Division of Endocrinology and Metabolism is located on the 7th and 8th floors of Fierman Hall, at 317 East 17th Street, between First and Second Avenues. The Division is supported by a dedicated staff, which includes certified diabetes educators (a nutritionist and two nurses), two medical technicians, a practice manager, an office manager, four patient service representatives, and four administrative assistants.

First-Year Fellows

First-year fellows are responsible for inpatient consultations and participate in general endocrinology and diabetes clinics. They are exposed to a full range of endocrine and metabolic disorders, including:

  • Type 1 and type 2 diabetes
  • Gestational diabetes
  • Polycystic ovary syndrome
  • Lipid disorders
  • Obesity
  • Osteoporosis
  • Fluid/Electrolyte Abnormalities
  • Nuclear medicine rounds


  • Diseases of:
    - the pituitary
    - the thyroid
    - the parathyroid
    - the adrenal glands
    - ovaries and glands
    - bone and calcium metabolism

During the first year of training, fellows work with a team comprised of attending endocrinologists, nurses, and nutritionists, and learn to provide rapid, optimal and comprehensive care to diabetic patients. In doing so, they become familiar with the various modalities of diabetes treatment, including multiple injection and insulin pump therapies. The first year fellows participate in two in-patient consultation services: the general endocrine service (in which they deal with the disorders listed above); and the cardiothoracic surgery service (in which they consult on patients undergoing cardiac surgery who have hyperglycemia). The fellows also participate in on-going research projects involving patients undergoing CABG surgery.

Second-Year Fellows

Second-year fellows participate in the following rotations:

  • Endocrinology clinic
  • Diabetes clinic
  • Pediatric endocrinology clinic
  • Male and female reproductive endocrinology clinics
  • High risk obstetrics
  • Diabetes education
  • Vascular surgery
  • Nutrition therapy
  • Cytopathology

During the second year, fellows participate in inpatient hyperalimentation rounds and undergo instruction in nutrition and in interpretation of bone density studies and thyroid cytology. The remainder of the second year is devoted to a research project chosen by the fellow.

Academic and Educational Resources

The fellows have an office equipped with two computers and printers dedicated for their use. All fellows attend various conferences throughout the academic year. These include Clinical Case Discussion, Endocrine Curriculum Conference, Journal Club, Endocrine Imaging Conference (Nuclear, MRI, CT and Ultrasound), Thyroid Pathology Conference, Research Conference, joint Endocrine and Head and Neck Surgery Thyroid/Parathyroid Conference, and joint Endocrine and Rheumatology Bone Metabolism Conference. All fellows meet with the division chief weekly to discuss ongoing projects and to assess progress.

Research Opportunities

The Division of Endocrinology and Metabolism has its own up-to-date, fully equipped basic science laboratory. The following research projects are currently active:

  • Receptor mechanisms of insulin and insulin-like growth factor (IGF) action in the ovary--an in vitro study on the molecular and cellular levels
  • Rosiglitazone ADOPT: a diabetes outcome progression trial--a multi-center study of the efficacy of rosiglitazone on the preservation of b-cell function in type 2 diabetes
  • The effects of tight glycemic control on the outcomes of open heart surgery in patients with diabetes mellitus--a clinical outcomes study summarizing the experience of the Diabetes Team at Mount Sinai Beth Israel.
  • Effects of exposure to radiation from the Chernobyl accident on thyroid function.
    A collaborative study with investigators at the New York Eye and Ear Infirmary of Mount Sinai of thyroid function in adults and children exposed to the radioactive fall-out from the Chernobyl accident.
  • The use of intensive insulin therapy in both diabetic and non-diabetic patients undergoing coronary artery bypass surgery: effects on insulin resistance, serum free fatty acid levels, oxygen free radical formation, inflammatory mediators, and the hormones that regulate fluid balance.
    A collaborative study with the department of Cardiothoracic Surgery on the benefits of intensive insulin therapy during CABG surgery.
  • Effects of thiazolidinedione treatment before CABG surgery on surgical outcomes.
    A pilot study designed to test the feasibility of a clinical trial of thiazolidinedione treatment during CABG surgery.
  • Vitamin D supplementation in individuals with type 2 diabetes and vitamin D deficiency.
    A pilot study investigating the relationship between vitamin D deficiency and insulin resistance.
  • 10- year study of patients receiving growth hormone therapy.
    An observational study of patients receiving growth hormone therapy, either as part of additional hormone replacement for hypopituitarism or for isolated growth hormone deficiency.
  • Effect of adding premixed insulin, Novolog mix 70/30, to existing oral insulin sensitizer therapy.
    A study looking at the effect on hemoglobin A1C and glycemia.


The Fellowship Program in Endocrinology and Metabolism is staffed by dedicated and enthusiastic clinicians and seasoned researchers who are committed to training specialists in the field.

Leonid Poretsky, MD, Chief, Division of Endocrinology and Metabolism; Program Director, Fellowship in Endocrinology and Metabolism; Professor of Medicine, Icahn School of Medicine at Mount Sinai.

Dr. Leonid Poretsky graduated cum laude from the First Medical Institute in Leningrad, Russia. He completed fellowship in Endocrinology and Metabolism at Boston’s Beth Israel Hospital and Harvard Medical School. He is board-certified in internal medicine and in endocrinology. His research interests, supported throughout his career by National Institutes of Health (NIH) grants, include the mechanisms of interactions between insulin and insulin-like growth factors with their receptors, particularly, in the human ovary; endocrine manifestations of AIDS; and clinical outcome studies in diabetes.
Dr. Poretsky is the author of more than 60 publications in the leading endocrine journals. He is also the editor of the new 780-page textbook of diabetes entitled “Principles of Diabetes Mellitus” (Kluwer Academic Publishers, Boston, MA, 2002). His research studies are presented regularly at the annual Endocrine Society meetings and the annual American Diabetes Association (ADA) meetings. Dr. Poretsky has served as a grant reviewer for several organizations, including the NIH, Great Britain’s Royal Research Council, and the Endocrine Fellows Foundation. He also has served as a manuscript reviewer for numerous journals, including the New England Journal of Medicine, the Journal of Clinical Endocrinology and Metabolism, the International Journal of Obesity, Transplantation, Metabolism, and Fertility and Sterility. . He is a member of the Endocrine Society and the ADA, and is a founding member and a member of the Board of Directors of the Metropolitan Diabetes Society.

Gerald Bernstein, MD, FACP, Attending Physician, Associate Clinical Professor, Icahn School of Medicine at Mount Sinai

Dr. Bernstein graduated from Dartmouth College and Tufts University School of Medicine. He completed a research fellowship in Endocrinology at Montefiore Medical Center, and is board certified in internal medicine and in endocrinology and metabolism. Dr. Bernstein serves on the National Board of Directors of the ADA, its Research Foundation, and many of its national committees; he is a former president of the ADA as well as the ADA’s New York Downstate affiliate. He is on the Editorial Board of the publication Clinical Diabetes; is the author of a number of clinical and scientific papers; and he has written the book, If it Runs in Your Family: Diabetes Mellitus, Reducing Your Risk.

Agustin Busta, MD, Director, Diabetes Clinic; Director, Clinical Trials Unit.

Dr. Busta received his medical degree from Federico Villarreal National University School of Medicine in Lima, Peru, and completed fellowship in Endocrinology and Metabolism at New York University Medical Center. Prior to joining our division, Dr. Busta served as an attending endocrinologist at the Mount Sinai Diabetes Center, as well as a clinical instructor in endocrinology and diabetes at Mount Sinai School of Medicine. He is board-certified in internal medicine and endocrinology, and is a member of the ADA, the American Society of Internal Medicine and the American Association of Clinical Endocrinologists (AACE). His areas of expertise include diabetes management with intensive insulin therapy, thyroid diseases during pregnancy, and adrenal diseases. Dr. Busta’s research interests include optimizing clinical outcomes in patients with diabetes undergoing coronary artery bypass graft surgery, and the role of thiazolidinediones in pancreatic beta-cell preservation.

Joel Curtis, MD, Attending Physician, Assistant Professor of Medicine, Cornell University Medical College.

Dr. Curtis graduated form the University of Vermont and Chicago Medical School and completed residency in Internal Medicine at Bellevue Hospital in New York City. Following this he was a fellow in Endocrinology at New York Medical College, where he received an award for his work on diabetic retinopathy.

Board-certified in Internal Medicine, Dr. Curtis had a private practice in internal medicine and endocrinology in NYC for many years before joining the Faculty Practice of Cornell University Medical College, and then, more recently, the Endocrinology Division of Mount Sinai Beth Israel. An active teacher during his entire professional career, Dr. Curtis taught second, third and fourth year medical students at Mount Sinai School of Medicine, was a Problem Based Learning tutor for four years at Cornell and served for many years as a student mentor at Albert Einstein College of Medicine.

Professional memberships have included the American Society of Internal Medicine, AACE and the ADA, where Dr. Curtis served as a lecturer in the ADA’s community outreach program. His clinical interests include thyroid disease and diabetes.

Adrienne M. Fleckman, MD, Program Director, Department of Internal Medicine Residency Training Program; Program Director of the Learn and Earn Program (a unique work-study program); Associate Chairperson, Department of Internal Medicine; Professor of Clinical Medicine, Albert Einstein College of Medicine.

Dr. Fleckman was trained in endocrinology at the Albert Einstein College of Medicine (AECOM) and is board certified in internal medicine, endocrinology, and family medicine. She was previously Chief of the Medical Service at Kings County Hospital. As assistant dean at AECOM, Dr. Fleckman enjoys an active role in teaching medical students and housestaff. Her special interests include pituitary disease, adrenal disorders in hospitalized patients, diabetic ketoacidosis and pheochromocytoma.

Alina Gouller, MD, Director, Endocrine Clinic

Dr. Gouller received her medical degree from Medical School in St. Petersburg, Russia. She completed her fellowship in endocrinology and metabolism at New York University. She is board certified in internal medicine and endocrinology. Dr. Gouller is a member of The Endocrine Society and AACE. Her research and special interests include polycystic ovary syndrome, growth hormone deficiency in elderly, thyroid cancer, thyroid nodules and effect of tight glycemic control on outcomes of cardiac surgery.

Emilia Pauline Liao, MD, Assistant Program Director, Fellowship in Endocrinology and Metabolism

Dr. Liao graduated from Massachusetts Institute of Technology and Albany Medical College. She completed fellowship in endocrinology, diabetes, and bone diseases at Mount Sinai School of Medicine. Dr. Liao is board-certified in internal medicine and endocrinology, and is a member of American Society of Internal Medicine, The Endocrine Society, and AACE. Her research interests include the relationship between vitamin D deficiency and insulin resistance, and her clinical interests include metabolic bone disease, polycystic ovary syndrome, and diabetes. Dr. Liao also teaches as a preceptor for the third year medicine clerkship and gives talks regularly for the medicine housestaff, as well as the patient community.

Aida H. Saliby, M.D. Attending Physician

Dr. Saliby obtained her medical degree from the Lebanese University, Faculty of Medical Sciences and completed fellowship in endocrinology and metabolism at Baylor College of Medicine in Houston, Texas. She is board-certified in internal medicine and endocrinology, and is a member of American Society of Internal Medicine and The Endocrine Society. Dr. Saliby is currently investigating the effects of intensive insulin therapy and thiazolidinediones on the outcomes of cardiac surgery.

Walter N. Scott, MD, Professor, New York University; Director, Curriculum Development, Beth Israel Fellowship in Endocrinology and Metabolism

Dr. Scott received his medical degree, with honors, from the University of Louisville. After completion of an internship and residency at New England Medical Center in Boston, he entered training in metabolism at Massachusetts Memorial Hospital and Boston City Hospital. This was followed by fellowship work at Harvard Medical School and MIT. Dr. Scott’s endocrine-related research, supported by the National Institutes of Health, National Science Foundation, and the American Heart Association, yielded over 60 refereed publications. He served as President of the New York Academy of Sciences. Dr. Scott is a tenured professor at New York University, where he teaches endocrinology and physiology. His special clinical interests are fertility problems and thyroid disorders.

Donna Seto-Young, PhD, Director, Research Laboratory, Division of Endocrinology and Metabolism; Associate Professor of Medicine, Icahn School of Medicine at Mount Sinai.

Dr. Seto-Young received her BS in microbiology and immunology from McGill University and her PhD in Biochemistry from the University of Cambridge. She completed her postdoctoral studies at Harvard University. Subsequently, she was a Natural Science of Engineering Research Council Fellow of Canada and a Senior Research Scientist in Rockefeller University. Dr. Seto-Young has studied the structure and function of plasma membrane H+-ATPase and the Na+-K+-pump current in isolated heart cells. She also examined structure and regulation of cystic fibrosis transmembrane conductance regulator’s nucleotide binding domains. Her current research focus is on the role of insulin, insulin like growth factors (IGFs) and peroxisome proliferator activated receptor-gamma ?in the regulation of human ovarian function. She is also interested in the adipocytokines and 1, 25-di-(OH)2-vitamin D in the regulation of ovarian function. She has published 35 scientific papers and regularly presents her work at national and international meetings.

Barnett Zumoff, MD, former Chief Emeritus, Division of Endocrinology and Metabolism; Attending Physician, Mount Sinai Beth Israel; Professor of Medicine, Icahn School of Medicine at Mount Sinai
Dr. Zumoff graduated from Columbia University and the Long Island College of Medicine. He is board certified in internal medicine and in endocrinology and metabolism. Dr. Zumoff completed fellowship at Sloan-Kettering Institute and became a staff member there. He has held positions at Montefiore Medical Center as assistant chief of the Department of Oncology, director of the Clinical Research Center, and director of Cancer Endocrinology in the Department of Oncology; associate professor of medicine and professor of medicine at the Mount Sinai School of Medicine. Dr. Zumoff is a world-renowned researcher in the field of human steroid metabolism and physiology, particularly in relation to cirrhosis of the liver, polycystic ovary syndrome, diabetes, obesity, coronary disease, prostate cancer, and breast cancer. He has published about 250 papers in these fields and numerous chapters in books on those subjects.