Doctors + Care Team

In many cases, our doctors have the expertise to manage many of your symptoms. They'll also have the background to recognize and treat any other gastrointestinal issues you're experiencing. As a result, you'll enjoy the convenience of seeing one specialist for multiple illnesses.

If you are facing a more-complex gastrointestinal disorders, your doctor can consult with division colleagues who specialize in managing inflammatory bowel disease, eosinophilic esophagitis, liver diseases, biliary pancreatic diseases and other conditions. If you have an especially complicated case, we may have the appropriate specialist take over your care.

Robert F. Yacavone, MD

Robert F. Yacavone, MD

Accepting New Patients

Virtual Appointments Available

Title(s): Interim Chief, Division of Gastroenterology/Hepatology; Director, Endoscopy Unit; Assistant Professor, Tufts University School of Medicine; Gastroenterologist
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

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Harmony Allison, MD
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Harmony Allison, MD

Accepting New Patients

Virtual Appointments Available

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 disease and limited liver function test abnormalities

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Aaron M. Dickstein, MD
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Aaron M. Dickstein, MD

Accepting New Patients

Virtual Appointments Available

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

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Jacob M.  Elkon, MD

Jacob M. Elkon, MD

Accepting New Patients

Title(s): Hematologist/Oncologist; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Hematology/Oncology
Appt. Phone: 617-636-6227
Fax #: 617-636-8538

Gastrointestinal cancers, including colon, rectal, esophageal, stomach, liver and pancreatic cancers

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Sushrut Jangi, MD

Sushrut Jangi, MD

Accepting New Patients

Title(s): Gastroenterologist; Assistant Professor of Medicine, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-9292

Gastroenterology, Inflammatory Bowel Disease

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Raffi Karagozian, MD

Raffi Karagozian, MD

Accepting New Patients

Virtual Appointments Available

Title(s): Hepatologist; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-4505

Transplant hepatology, Hepatitis C

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David Lee, MD

David Lee, MD

Virtual Appointments Available

Title(s): Advanced Hepatology Fellow
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-9292

Chronic liver diseases, viral hepatitis, fatty liver diseases, autoimmune and hereditary liver disorders

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John Leung, MD

John Leung, MD

Accepting New Patients

Virtual Appointments Available

Title(s): Director, Center for Food Related Diseases at Tufts Medical Center; Co-Director, Food Allergy Center at Tufts Children's Hospital; 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

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Alexander N.  Levy, MD

Alexander N. Levy, MD

Accepting New Patients

Virtual Appointments Available

Title(s): Gastroenterologist; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #: 617-636-9292

Inflammatory bowel disease, Crohn's disease, ulcerative colitis, general gastroenterology, gastrointestinal endoscopy and colonoscopy, chromoendoscopy, colon cancer screening

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Raza Malik, MD, PhD

Raza Malik, MD, PhD

Accepting New Patients

Virtual Appointments Available

Title(s): Director, Hepatology; Associate Chief, Division of Gastroenterology; Assistant Professor, Tufts University School of Medicine
Department(s): Medicine, Gastroenterology
Appt. Phone: 617-636-5883
Fax #:

Acute Liver Failure, Liver Transplantation, General Hepatology

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Joel B. Mason, MD

Joel B. Mason, MD

Accepting New Patients

Virtual Appointments Available

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

Malabsorption and unintentional weight loss, Inflammatory bowel disease, nutritional aspects of gastrointestinal disease, home nutritional therapy, enteral and parenteral nutrition

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Miu Lai Ng, FNP, MPH

Miu Lai Ng, FNP, MPH

Accepting New Patients

Virtual Appointments Available

Title(s): Nurse Practitioner
Department(s): Gastroenterology, Hepatology
Appt. Phone: 617-636-5883
Fax #: 617-636-9292

Hepatitis B, Hepatitis C, Fatty liver diseases, autoimmune hepatitis, PSC, PBC, Cirrhosis”

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Lori B. Olans, MD, MPH
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Lori B. Olans, MD, MPH

Accepting New Patients

Virtual Appointments Available

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

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Andrew G. Plaut, MD
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Andrew G. Plaut, MD

Accepting New Patients

Virtual Appointments Available

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

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Mark J. Sterling, MD

Mark J. Sterling, MD

Accepting New Patients

Virtual Appointments Available

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

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Joel V. Weinstock, MD

Joel V. Weinstock, MD

Accepting New Patients

Virtual Appointments Available

Title(s): Gastroenterologist; 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

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