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Residencies + Fellowships View All Training + Education Meet Our Residents and Fellows Training + Education at Tufts MC Continuing Medical Education Medical Libraries and Resources Graduate Medical Education Office Medical Staff Office
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About Tufts Medical Center Learn All About Tufts Medical Center Who We Are Helpful Phone Numbers History of Tufts Medical Center Locations + Directions Share Your Story Policies + Public Documents Quality + Safety Recent Awards + Recognitions Volunteer Services
Doctors + Care Team Request Appointment Joel V. Weinstock, MD Title(s): Chief, Division of Gastroenterology/Hepatology; Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-4505 Gastroenterology, inflammatory bowel diseases, mucosal immunity, general gastroenterology, GI bleeding, endoscopy View Full Profile Book an Appointment Harmony Allison, MD Title(s): Gastroenterologist; Clinical and Research Instructor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-1480 Gastrointestinal motility, inflammatory bowel disease, general GI and endoscopy, diarrhea, constipation, celiac sprue and limited LFT abnormalities View Full Profile Book an Appointment Aaron M. Dickstein, MD Title(s): Gastroenterologist; Director, Gastroenterology Fellowship Program; Assistant Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-9292 General gastroenterology, gastrointestinal endoscopy and colonoscopy, gastrointestinal motility, obscure GI bleeding, fecal microbiota transplantation, video capsule endoscopy View Full Profile Request Appointment Raffi Karagozian, MD Title(s): Hepatologist Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-4505 Transplant hepatology, Hepatitis C View Full Profile Book an Appointment John Leung, MD Title(s): Director, Center for Food Related Diseases at Tufts Medical Center; Co-Director, Food Allergy Center at Floating Hospital for Children; Allergist; Assistant Professor, Tufts University School of Medicine Department(s): Medicine, Pediatric Allergy, Gastroenterology, Pediatric Gastroenterology Appt. Phone: 617-636-5883 (Gastroenterology) Fax #: 617-636-9292 Allergic rhinitis (seasonal allergy), anaphylaxis, angioedema, asthma, celiac disease, chronic urticarial (hives), drug allergies, eczema, eosinophilic esophagitis/eosinophilic gastrointestinal disorders, food allergy (e.g. peanuts, cow milk, soy, etc.), food intolerance (lactose, fructose, fructan), food protein-induced enterocolitis syndrome (FPIES), immunodeficiency, oral allergy syndrome, pruritus, sinusitis, stinging insect allergy, wheat hypersensitivity View Full Profile Request Appointment Joel B. Mason, MD Title(s): Gastroenterologist; Professor, Tufts University Schools of Medicine and Friedman School of Nutritional Science and Policy; Senior Scientist and Director, Vitamins and Carcinogenesis Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University Department(s): Medicine, Clinical Nutrition, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-1480 Nutritional aspects of gastrointestinal disease, home nutritional therapy, enteral and parenteral nutrition, nutrition and cancer prevention View Full Profile Request Appointment Nikola Natov, MD Title(s): Gastroenterologist; Assistant Professor, TUSM Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-1480 Advanced endoscopy, ERCP, endoscopic ultrasound, benign and malignant esophageal disorders (esophageal strictures, Barrett's esophagus, cancer, achalasia), gastric intestinal metaplasia, acute and chronic pancreatitis, pancreatic cysts, biliary strictures, bile duct stones, cholangiocarcinoma, colon cancer screening and surveillance,endoluminal stenting, and endoscopic resection of large colon polyps. View Full Profile Book an Appointment Lori B. Olans, MD, MPH Title(s): Gastroenterologist; Assistant Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-8615 General gastroenterology, inflammatory bowel disease View Full Profile Book an Appointment Andrew G. Plaut, MD Title(s): Gastroenterologist; Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-4207 Gastroenterology, digestive diseases, gastrointestinal infections and parasitic disease, inflammatory bowel disease, diagnostic evaluation of unexplained pain or diarrhea View Full Profile Request Appointment Mark J. Sterling, MD Title(s): Advanced Endoscopist Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-9292 ERCP and EUS, pancreatico-biliary endoscopy including EUS guided biopsy, direct cholangioscopy and laser lithotripsy, deep small bowel enteroscopy including management of obscure GI bleeding, GI luminal stenting, endoscopic mucosal resection View Full Profile Request Appointment Robert F. Yacavone, MD Title(s): Attending Physician Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-9292 Therapeutic endoscopy, endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), radiofrequency ablation (RFA) for barrett’s esophagus, endoscopic mucosal resection (EMR), endoluminal stenting View Full Profile
Request Appointment Joel V. Weinstock, MD Title(s): Chief, Division of Gastroenterology/Hepatology; Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-4505 Gastroenterology, inflammatory bowel diseases, mucosal immunity, general gastroenterology, GI bleeding, endoscopy View Full Profile Book an Appointment Harmony Allison, MD Title(s): Gastroenterologist; Clinical and Research Instructor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-1480 Gastrointestinal motility, inflammatory bowel disease, general GI and endoscopy, diarrhea, constipation, celiac sprue and limited LFT abnormalities View Full Profile Book an Appointment Aaron M. Dickstein, MD Title(s): Gastroenterologist; Director, Gastroenterology Fellowship Program; Assistant Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-9292 General gastroenterology, gastrointestinal endoscopy and colonoscopy, gastrointestinal motility, obscure GI bleeding, fecal microbiota transplantation, video capsule endoscopy View Full Profile Request Appointment Raffi Karagozian, MD Title(s): Hepatologist Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-4505 Transplant hepatology, Hepatitis C View Full Profile Book an Appointment John Leung, MD Title(s): Director, Center for Food Related Diseases at Tufts Medical Center; Co-Director, Food Allergy Center at Floating Hospital for Children; Allergist; Assistant Professor, Tufts University School of Medicine Department(s): Medicine, Pediatric Allergy, Gastroenterology, Pediatric Gastroenterology Appt. Phone: 617-636-5883 (Gastroenterology) Fax #: 617-636-9292 Allergic rhinitis (seasonal allergy), anaphylaxis, angioedema, asthma, celiac disease, chronic urticarial (hives), drug allergies, eczema, eosinophilic esophagitis/eosinophilic gastrointestinal disorders, food allergy (e.g. peanuts, cow milk, soy, etc.), food intolerance (lactose, fructose, fructan), food protein-induced enterocolitis syndrome (FPIES), immunodeficiency, oral allergy syndrome, pruritus, sinusitis, stinging insect allergy, wheat hypersensitivity View Full Profile Request Appointment Joel B. Mason, MD Title(s): Gastroenterologist; Professor, Tufts University Schools of Medicine and Friedman School of Nutritional Science and Policy; Senior Scientist and Director, Vitamins and Carcinogenesis Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University Department(s): Medicine, Clinical Nutrition, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-1480 Nutritional aspects of gastrointestinal disease, home nutritional therapy, enteral and parenteral nutrition, nutrition and cancer prevention View Full Profile Request Appointment Nikola Natov, MD Title(s): Gastroenterologist; Assistant Professor, TUSM Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-1480 Advanced endoscopy, ERCP, endoscopic ultrasound, benign and malignant esophageal disorders (esophageal strictures, Barrett's esophagus, cancer, achalasia), gastric intestinal metaplasia, acute and chronic pancreatitis, pancreatic cysts, biliary strictures, bile duct stones, cholangiocarcinoma, colon cancer screening and surveillance,endoluminal stenting, and endoscopic resection of large colon polyps. View Full Profile Book an Appointment Lori B. Olans, MD, MPH Title(s): Gastroenterologist; Assistant Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-8615 General gastroenterology, inflammatory bowel disease View Full Profile Book an Appointment Andrew G. Plaut, MD Title(s): Gastroenterologist; Professor, Tufts University School of Medicine Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-4207 Gastroenterology, digestive diseases, gastrointestinal infections and parasitic disease, inflammatory bowel disease, diagnostic evaluation of unexplained pain or diarrhea View Full Profile Request Appointment Mark J. Sterling, MD Title(s): Advanced Endoscopist Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-9292 ERCP and EUS, pancreatico-biliary endoscopy including EUS guided biopsy, direct cholangioscopy and laser lithotripsy, deep small bowel enteroscopy including management of obscure GI bleeding, GI luminal stenting, endoscopic mucosal resection View Full Profile Request Appointment Robert F. Yacavone, MD Title(s): Attending Physician Department(s): Medicine, Gastroenterology Appt. Phone: 617-636-5883 Fax #: 617-636-9292 Therapeutic endoscopy, endoscopic retrograde cholangiopancreatography (ERCP), endoscopic ultrasound (EUS), radiofrequency ablation (RFA) for barrett’s esophagus, endoscopic mucosal resection (EMR), endoluminal stenting View Full Profile
