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Physicians David Thien-Shing Chia, M.D., FACP, FACG
Dr. David Thien-Shing Chia was born in British North Borneo (Sabah, Malaysia), where his parents were Protestant missionaries from China. Dr. Chia received his medical education in Tawain, Republic of China. He completed his residency training in internal medicine and fellowship in gastroenterology at the Veterans Administration Hospital, Brooklyn Downstate Medical Center. Dr. Chia was certified as a diplomate of the American Board of Internal Medicine, subspecialty gastroenterology, in 1973. He served 3 years as a full-time teaching attending in internal medicine and gastroenterology at Missericordia Hospital-Fordham Hospital in the Bronx, New York, and was appointed as assistant professor of medicine at New York Medical College in 1974. He was elected as a fellow of the American College of Gastroenterology in 1974 and a fellow of the American College of Physicians in 1982. Dr. Chia joined the medical staff of Phelps Memorial Hospital Center as a private practice gastroenterologist in 1975 and served as chief, Division of Gastroenterology, from 1987 to 1999. Dr. Chia has also held a position on the medical board at Phelps.
Barry E. Field, M.D., joined the practice in 1978, and is board certified in gastroenterology. Dr. Field attended Harvard for his undergraduate education. He attended medical school at the Albert Einstein College of Medicine in New York. Dr. Field completed his medical residency at Metropolitan Hospital in Manhattan. Upon graduation, he moved West to serve as a fellow in gastroenterology at UCLA, Harbor General Hospital in Torrance, California. Dr. Field is currently Director of Gastroenterology at Phelps Memorial Hospital Center. He held the title of Director of Medicine at the hospital for 12 years. Dr. Field's special interests include the management of patients with inflammatory bowel disease and he is a member of the "Innovations in the Management of Inflammatory Bowel Disease Visiting Faculty." New York magazine has included Dr. Field in their "Best Gastroenterologist in New York" feature for the past two years.
Floyd C. Byfield, M.D., joined the practice in 1999 as a board-certified gastroenterologist, after 6 years at Columbia-Presbyterian Medical Center in New York. Dr. Byfield received his undergraduate degree from Binghamton University. He attended medical school at the Mount Sinai Medical Center in New York. Dr. Byfield completed his medical residency and fellowship in gastroenterology at Columbia-Presbyterian Medical Center. He was acknowledged with an award for excellence in clinical research and was voted "Fellow of the Year." Dr. Byfield was one of the first physicians to bring endoscopic ultrasound to the Westchester, Rockland, Putnam and Orange county area. He received extensive training in biliary and pancreatic endoscopy. Dr. Byfield has also published articles in several professional journals and has held a position on the Phelps Memorial Hospital medical board.
Christopher A. Martin, M.D., joined the practice in 2005. He is a board-certified subspecialist in gastroenterology and liver diseases. Dr. Martin received his undergraduate degree from Cornell University and post-baccalaureate training at Harvard. He then obtained his medical degree from Cornell University Medical College and remained in Manhattan for his postgraduate training. He completed his medical residency at New York Presbyterian Hospital's Cornell Campus, which included extensive training at Memorial Sloan-Kettering Cancer Center. After residency, Dr. Martin received his fellowship training in Gastroenterology at Columbia-Presbyterian's St. Luke's-Roosevelt affiliate, including broad experience in hepatology at Manhattan's Mount Sinai Hospital. With a strong interest in general gastroenterology and endoscopy, including colon cancer prevention, esophageal disorders, and hepatobiliary diseases, Dr. Martin has published articles in professional journals and has presented at local and national gastroenterology conferences. Dr. Martin is a member of the Phelps Memorial Hospital Medical Staff Affairs Committee. Dr. Martin is also fluent in Spanish and conversational in French and Italian.
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Westchester Gastroenterology Associates, P.C.
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