Alexandra Guillaume, MD
Director, Gastrointestinal Motility Center, and Assistant Professor, Department of Medicine
Dr. Guillaume is a board-certified gastroenterologist with expertise in motility disorders of the gastrointestinal tract. She leads the Stony Brook University Hospital Gastrointestinal Motility Center which specializes in the diagnosis and management of feeding and swallowing disorders as well as luminal motility disorders involving diarrhea and/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.
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.