Frances B. Horenstein, M.D., received her Medical Degree from the University of Santo Tomas, Manila, Philippines.  She completed an internal medicine residency and a gastroenterology fellowship at Harlem Hospital – Columbia University Medical Center, New York, New York.  Dr. Horenstein is board certified in internal medicine and gastroenterology.

Mohammed K. Mazumder, M.D., received his Bachelor of Medicine and Surgery degree at Chittagong Medical College in Chittagong, Bangladesh. He completed an internship and residency in internal medicine and a fellowship in gastroenterology at The Brooklyn Hospital Center, an affiliate of New York – Presbyterian Healthcare System in Brooklyn, New York. He is board certified in internal medicine and gastroenterology.

Sean T. McCarthy, M.D., received his Medical Degree at The Ohio State University College of Medicine and Public Health in Columbus.  He completed an internal medicine residency at the McGaw Medical Center of Northwestern University and a gastroenterology and advanced endoscopy fellowship at the University of Michigan Health System.  Dr. McCarthy is board certified in internal medicine and gastroenterology. 

David Subler, M.D., earned his Medical Degree from The Ohio State University in Columbus, Ohio. He completed an internship and residency in internal medicine at the University of Michigan Medical Center in Ann Arbor. He also completed a fellowship in gastroenterology at the University Hospitals of Cleveland, Case Western Reserve University School of Medicine. Dr. Subler is board certified as a Diplomate with the National Board of Medical Examiners, and the American Board of Internal Medicine, subspecialty of gastroenterology.

Candy A. Thorpe, APRN-CNP, earned her Bachelor of Science in nursing at Muskingum University in New Concord, Ohio.  She received her Master of Science in nursing as a family nurse practitioner at the University of Cincinnati in Cincinnati.  She is certified by the American Academy of Nurse Practitioners.