Houston Methodist. Leading Medicine.
Houston Methodist. Leading Medicine


Faculty - Endocrinology

Richard Robbins, MD, FACP (Subspecialty Education Coordinator)is the Chairman of the Department of Medicine and the Charles and Anne Duncan Distinguished Chair at The Methodist Hospital. He is also Professor of Medicine at the Weill Cornell Medical College and a Senior Member of The Methodist Hospital Research Institute. Dr. Robbins received his medical degree from Creighton University and completed his medical residency at the New Hospital-Cornell Medical Center. Dr. Robbins has been recognized as one of the "Best Doctors in New York" by New York Magazine and as one of the "Top Cancer Doctors" and "Top Endocrinologists" in America by Castle Connolly.  Dr. Robbins currently serves at the Program Director of The Methodist Hospital's Endocrinology Fellowship Program.


Dale J. Hamilton, MD, FACP is Associate Professor of Clinical Medicine, Weill Cornell Medical College, Clinical Service Chief, Section of Diabetes, Obesity & Lipids, Director, Diabetes Heart Program and Associate, TMH Research Institute. He received his medical degree from St. Louis University School of Medicine and completed his residency and fellowship in Endocrinology and Diabetes at Baylor College of Medicine in Houston. He has been honored as a "Best" or "Top" doctor listing in Endocrinology and Metabolism on numerous occasions. Dr. Hamilton’s primary research interest relates to the metabolic effects of diabetic states on the heart and cardiovascular system.

Willa Hsueh, MD is currently the Director of the Diabetes Research Center and Chief of the Division of Diabetes, Obesity & Lipids. She received her medical degree from Ohio State University and went on to her general medicine residency and internship at Johns Hopkins Hospital in Baltimore, MD where she also completed her clinical fellowship in endocrinology. Dr. Hsueh then went on to also complete a research fellowship in endocrinology at Stanford University School of Medicine in California. Before joining The Methodist Hospital Research Institute in 2007 she held the position of Chief of the Division of Endocrinology, Diabetes and Hypertension at LAC/USC School of Medicine and then assumed the same position at the David Geffen School of Medicine at UCLA, California. While at UCLA, Dr. Hsueh was Principal Investigator on several NIH grants and published over 40 papers in peer-reviewed medical journals. Her research team was the first to identify a potentially protective role for ligands of the nuclear receptor, peroxisome proliferator activated receptor y (PPARy) in vascular injury and more recently, in diabetes complications, particularly in regulation of genes that may mediate vascular complications. 

Steven Michael Petak, MD, MACE, JD is an endocrinologist specializing in metabolic bone disease, bone densitometry, thyroid disorders and reproductive medicine. He is a also an endocrine and metabolic bone consultant to NASA-JSC. He is a past president of the American Association of Clinical Endocrinologists, American College of Endocrinology and the International Society for Clinical Densitometry. He is a Master of the American College of Endocrinology and a past recipient of the clinician of the year award from ISCD. Dr. Petak received his medical degree from University of Illinois at Chicago and completed his medical residency, chief residency and endocrine fellowship at the University of Texas at Houston. He received his JD magna cum laude from the University of Houston and is a licensed attorney in Texas.



Mary Ruppe, MD. is an endocrinologist who specializes in the treatment of metabolic bone disease.  She is the program director of the endocrine fellowship.  In addition to her clinical duties with the Methodist Academic Medicine Associates, she oversees the pediatric rickets clinic at the Shriners Hospital.  She received her undergraduate degree from Harvard University and her medical degree from Albert Einstein College of Medicine before completing her residency at Georgetown University Medical Center and fellowship at Johns Hopkins Medical Institute. She is a member of the Endocrine Society and the American Society of Bone and Mineral Research.  She is very involved with Women in Endocrinology having been elected and having served as the Secretary-Treasurer of the organization from 2010-2013.   Her research interests focus on genetic bone diseases with a special interest in X-linked hypophosphatemic rickets. 


Archana Sadhu, MD received her medical degree and also completed her fellowship training in Endocrinology, and Diabetes & Metabolism at David Gelfen School of Medicine at UCLA. Dr. Sadhu is board certified in Internal Medicine, Endocrinology and Diabetes & Metabolism. She also has memberships in the American Diabetes Association, American Association of Clinical Endocrinologists, The Endocrine Society and the American Society of Transplantation. Dr. Sadhu's research interests include outcomes of inpatient glucose management, transplant diabetes and endocrinology.