Division of Endocrinology Fellowship | Leadership

Program Leadership

Ari J. Wassner is Fellowship Program Director for Endocrinology at Boston Children’s Hospital. He earned his MD from Harvard Medical School and completed residency in Pediatrics at Boston Children’s Hospital, where he also served as Chief Resident. He completed fellowship in Pediatric Endocrinology at Boston Children’s Hospital. Dr. Wassner is a member of the American Thyroid Association Trainees and Career Advancement Committee and the Boston Children’s Hospital Graduate Medical Committee. In addition to participating in resident and fellow education, he is extensively involved in preclinical medical education and curriculum development at Harvard Medical School, for which he received the 2017 Robert P. Masland, Jr., Award for Excellence in Teaching at Children’s Hospital Boston. Dr. Wassner is also Director of the Thyroid Program at Boston Children’s Hospital. His basic research has investigated the role of thyroid hormone metabolism in modulating local and systemic thyroid hormone signaling in disease states including heart failure and liver injury. In addition to practicing general pediatric endocrinology, Dr. Wassner’s clinical and research interest is primarily in pediatric thyroid disease, with a particular focus on congenital hypothyroidism and on thyroid neoplasia in children, and he conducts clinical research in these areas.

Melissa K. Crocker is Associate Director of the Endocrinology fellowship training program at Boston Children’s Hospital. She earned her MD from Tufts University School of Medicine and completed residency training in Pediatrics at Children’s National Medical Center where she received teaching awards from the medical students. Her training was then followed by fellowship in Pediatric Endocrinology at the National Institutes of Health where she served as the fellow representative to the faculty. Dr. Crocker is also Director of the Type 2 Diabetes Program at Boston Children’s Hospital and has served on the scientific review committee and as an ad hoc reviewer for several peer-reviewed journals. In addition to practicing general pediatric endocrinology, Dr. Crocker’s clinical interests lie in pediatric obesity and diabetes. She conducts clinical research on pharmaceutical treatments for type 2 diabetes and has investigated the relationship of obesity to puberty and growth. She has earned teaching awards from medical students and enjoys precepting fellows and residents in clinic and on the wards.

Lynne Mills-Fawzy is the Program Coordinator for the Endocrinology Fellowship Program at, Boston Children's Hospital. She started her career in medical education while working in the Department of Medicine for the Boston Combined Residency Program at, Boston Children's Hospital. She is involved in the Graduate Medical Education Office and is a member of the wellness committee. Lynne has worked at Boston Children's Hospital for over ten years.