Alexandra Guillaume, MD

Dr. Guillaume is a board-certified gastroenterologist with expertise in the evaluation and management of motility disorders of the gastrointestinal tract. She is the Director of the Stony Brook University Hospital Gastrointestinal Motility Center which specializes in the diagnosis and treatment of feeding and swallowing disorders, luminal motility disorders such as gastroparesis or constipation, refractory GERD, irritable bowel syndrome and small intestinal bacterial overgrowth. Under the leadership of Dr. Guillaume, the motility center provides high resolution esophageal and anorectal manometry, esophageal pH testing, hydrogen breath tests, as well as Smart Pill, the only motility test to provide a complete transit profile of the entire GI tract.

Dr. Guillaume graduated from the Tufts University School of Medicine. She then completed Internal Medicine residency at New York University Medical Center prior to joining the GI fellowship program at Stony Brook University Hospital. She also has additional fellowship training in the management of enteral and parenteral nutrition from NY Presbyterian Hospital – Columbia University Medical Center. Dr. Guillaume has been selected by the American Society for Gastrointestinal Endoscopy as one of only 20 women this year to be a part of the Leadership Education and Development Program (LEAD) which offers women gastroenterologists of all backgrounds an opportunity to enhance and energize their leadership and career skills through education, coaching and building professional networks.