Dr. Dennis S Riff MD Gastroenterologist
Dr. Dennis Riff is a gastroenterologist in Anaheim, California. He is affiliated with multiple hospitals in the area, including Anaheim Regional Medical Center and Chapman Medical Center. He received his medical degree from Jefferson Medical College and has been in practice for 39 years. He is one of 13 doctors at Anaheim Regional Medical Center and one of 6 at Chapman Medical Center who specialize in Gastroenterology. He also speaks multiple languages, including Spanish, Vietnamese and Filipino.
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Specialty & Clinical Interests
Gastroenterologist: General Gastroenterology
Clinical Interests: Research, clinical gastroenterology, clinical pharmaceutical research
Education & Medical Training
University of California at Irvine
Residency, Internal Medicine, 1974
Thomas Jefferson University
Internship, Internal Medicine, 1971 - 1972
Jefferson Medical College
Class of 1971
UC Irvine Medical Center
Fellowship, Gastroenterology (IM), 1976
Certifications & Licensure
American Board of Internal Medicine
Certified 40 years in Internal Medicine
CA State Medical License
Active through 2013
Publications & Presentations
A Phase 3, Randomized, Double-Blind Comparison of Analgesic Efficacy and Tolerability of Q8003 vs Oxycodone or Morphine for Moderate-to-Severe Postoperative Pain Following Bunionectomy Surgery.
Richards, P.,Riff, D.,Kelen, R.,Stern, W.
Immunological priming induced by a two-dose series of H5N1 influenza antigen, administered alone or in combination with two different formulations of AS03 adjuvant in adults: results of a randomised single heterologous booster dose study at 15 months.
Risi, G., Frenette, L., Langley, J. M., Li, P., Riff, D., Sheldon, E., Vaughn, D. W., Fries, L.
Analgesic and adverse effects of a fixed-ratio morphine-oxycodone combination (MoxDuo) in the treatment of postoperative pain.
Richards, P., Riff, D., Kelen, R., Stern, W.
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1211 W La Palma Ave
Anaheim, CA 92801
Phone: (714) 778-1300
Fax: (714) 778-0303