
Dennis S. Riff, M.D.
Background
Dr. Dennis S. Riff is the founder of AGMG medical group. Born in Philadelphia, Pennsylvania, he is the father of four children including a son in medical school who will hopefully be joining the practice in the future. Dr. Riff is the author of multiple articles appearing in the literature on the treatment of diseasse of the gastrointestinal tract and on multiple other conditions. His full CV can be referenced elsewhere on this website.
Expertise
Dr. Riff is skilled in all endoscopic procedures and has done thousands of colonoscopies and upper gastrointestinal endoscopies. He is a compassionate and warm individual and an experienced physician in both Internal Medicine and Gastroenterology.
Education and Training
Dr. Riff went to Franklin and Marshall College and then to Jefferson Medical College. He graduated from both schools with distinction and went on to do his internship in internal medicine at Thomas Jefferson University Hospital in Philadelphia. He is certified by the Board of Internal Medicinie. Dr. Riff moved to California in 1972 and did a residency in internal medicine as well as completed a fellowship in Gastroenterology at University of California Irvine. He started clinical practice in Anaheim in 1976 with all other doctors joining him thereafter.
Associations
Dr. Riff is a fellow of the American College of Gastroenterology and a member of the following: American Society for Gastrointestinal Endoscopy, Orange County Medical Association, and the American Medical Association. Dr. Riff has served as both Chairman of Internal Medicine, and as a member of the board of the medical staff at Anaheim Memorial Hospital. He served as a team physician for the Los Angeles Rams when the professional football team played in Anaheim. He is a member of multiple other professional organizations.
Research
Dr. Riff founded the Advanced Clinical Research Institute (ACRI) and is the current Medical Director. He has served as a principal investigator or as a sub-investigator in over one thousand clinical pharmaceutical studies. He has done clinical research in collaboration with most of the major pharmaceutical companies in the world. He is frequently asked for his expert opinion on the development of new therapies for the treatment of gastrointestinal disorders.
Background
Dr. Dennis S. Riff is the founder of AGMG medical group. Born in Philadelphia, Pennsylvania, he is the father of four children including a son in medical school who will hopefully be joining the practice in the future. Dr. Riff is the author of multiple articles appearing in the literature on the treatment of diseasse of the gastrointestinal tract and on multiple other conditions. His full CV can be referenced elsewhere on this website.
Expertise
Dr. Riff is skilled in all endoscopic procedures and has done thousands of colonoscopies and upper gastrointestinal endoscopies. He is a compassionate and warm individual and an experienced physician in both Internal Medicine and Gastroenterology.
Education and Training
Dr. Riff went to Franklin and Marshall College and then to Jefferson Medical College. He graduated from both schools with distinction and went on to do his internship in internal medicine at Thomas Jefferson University Hospital in Philadelphia. He is certified by the Board of Internal Medicinie. Dr. Riff moved to California in 1972 and did a residency in internal medicine as well as completed a fellowship in Gastroenterology at University of California Irvine. He started clinical practice in Anaheim in 1976 with all other doctors joining him thereafter.
Associations
Dr. Riff is a fellow of the American College of Gastroenterology and a member of the following: American Society for Gastrointestinal Endoscopy, Orange County Medical Association, and the American Medical Association. Dr. Riff has served as both Chairman of Internal Medicine, and as a member of the board of the medical staff at Anaheim Memorial Hospital. He served as a team physician for the Los Angeles Rams when the professional football team played in Anaheim. He is a member of multiple other professional organizations.
Research
Dr. Riff founded the Advanced Clinical Research Institute (ACRI) and is the current Medical Director. He has served as a principal investigator or as a sub-investigator in over one thousand clinical pharmaceutical studies. He has done clinical research in collaboration with most of the major pharmaceutical companies in the world. He is frequently asked for his expert opinion on the development of new therapies for the treatment of gastrointestinal disorders.

