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A Gastroenterology and Internal Medicine specialist with more than three decades of experience, Matthew Joel Guy, MD, MedScD researches and practices from his offices in New York City. Matthew J. Guy, MD, MedScD began his specialization at the College of Physicians and Surgeons of Columbia University in the City of New York, where he earned his MD as well as his MedScD in Physiology and Medicine. Following his formal education, Matthew J. Guy, MD, MedScD achieved an internship and residency focused on Internal Medicine at Maimonides Medical Center in Brooklyn. Matthew J. Guy’s next fellowship in Gastroenterology at Columbia Presbyterian and St. Luke’s Hospitals was sponsored by NIH. There, Matthew J. Guy, MD, MedScD performed endoscopy and gastroenterology clinical work and conducted research. Dr. Matthew J. Guy’s published research includes his Doctoral Dissertation on Membrane Transport of Iron and Sugars within the intestine. Matthew J. Guy, MD, MedScD then accepted the role of principal investigator during Phase III and IV studies on new pharmaceuticals that addressed diseases in the digestive system and fluctuations in blood pressure. Throughout his private practice development, Matthew J. Guy, MD, MedScD took on additional responsibilities as a residency instructor at Peninsula Hospital Center and Maimonides Medical Center. Matthew Guy, MD, MedScD serves as Clinical Assistant Professor of Medicine at the State University of New York, Downstate Medical Center. Additionally, Matthew J. Guy MD, MedScD is the attending Gastroenterologist at Peninsula Hospital Center in Far Rockaway. With an emphasis in Gastroenterology, Matthew J. Guy, MD, MedScD remains committed to focusing his clinical practice and expanding his involvement in research regarding new gastrointestinal procedures, medicines, and medical equipment. Matthew J. Guy, MD, MedScD also supports continued academic education as a medical teacher. Matthew J. Guy, MD, MedScD holds membership with several professional associations, including the American Medical Association, the Medical Society of the State of New York, the Kings County Medical Society, and the American College of Physicians. Furthering his specializations, Matthew J. Guy, MD, MedScD actively contributes to the American Society for Gastrointestinal Endoscopy as a member and the American College of Gastroenterology as a Fellow.

Work experience

Jul 1974Present

Clinical and Academic Gastroenterology

Matthew J. Guy, MD, PC




College of Physician and Surgeons of Columbia University