Gastroenterology and Hepatology

About Us

The Division of Gastroenterology and Hepatology is dedicated to clinical practice, research and education in esophageal and motility disorders, including achalasia, dysphagia and GERD.

The division has a robust clinical practice that resides within our new Digestive Health Center … a true collaborative effort.”

– John Pandolfino, MD

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What We Do

Faculty: Meet the Team

View individual profiles of our faculty members and learn about their research and clinical specialties.

Marie-Pier Tetreault

Assistant Professor of Medicine (Gastroenterology and Hepatology)

In the Tetreault Lab, our goal is to better understand the crosstalk between epithelial cells and their surrounding microenvironment (immune cells, fibroblasts, endothelial cells). A particular area of expertise of our laboratory is in defining the role of epithelial inflammatory mediators in esophageal tissue homeostasis and esophageal disease pathogenesis. Our diseases of interest include esophageal cancer, eosinophilic esophagitis, scleroderma esophageal disease and achalasia. Our research program focuses on two key inflammatory pathways: the IKKß/NF¿B and STAT3 pathways. We employ novel th...

A Aziz Aadam

Associate Professor of Medicine (Gastroenterology and Hepatology)

Dr. Aadam is an interventional gastroenterologist with specialized expertise in gastrointestinal oncology as well as complex pancreas and biliary disorders. He is part of a mutli-disciplinary team that incorporates the latest research and state of the art technology into a patient centered comprehensive care plan. He is active in clinical research and has been invited to present his work at several national conferences. Dr. Aadam has undergone additional training to perform advanced endosopic procedures such as endoscopic ultrasound (EUS), ERCP, and stent placement within the GI tract. He is c...

Josh Levitsky

Professor of Medicine (Gastroenterology and Hepatology), Medical Education and Surgery (Organ Transplantation)

Liver transplantation, immunosuppression, biomarkers of rejection and chronic kidney disease in liver recipients, immunological tolerance

Nirmala Gonsalves

Professor of Medicine (Gastroenterology and Hepatology)

Eosinophilic esophagitis, eosinophilic gastrointestinal disease, gastroesophageal reflux disease, esophageal disorders, food allergy and gastrointestinal disease, celiac disease, general gastroenterology

Rajesh N Keswani

Associate Professor of Medicine (Gastroenterology and Hepatology)

Rajesh N. Keswani, MD, MS, is a gastroenterologist and nationally-recognized expert in interventional endoscopy who leads efforts to improve healthcare quality. He is the Medical Director of Quality for the Northwestern Medicine Digestive Health Center. Nationally, he informs clinical practice guidelines and endoscopy training standards by serving on committees of the American Society for Gastrointestinal Endoscopy, American Gastroenterological Association, and National Comprehensive Cancer Network. Dr. Keswani earned his undergraduate and medical degrees from Boston University, finished resid...

Darren M Brenner

Professor of Medicine (Gastroenterology and Hepatology) and Surgery

Gastrointestinal motility disorders and pelvic floor disorders including but not limited to Constipation/Fecal Incontinence/Irritable Bowel Syndrome/Dyspepsia/Gastroparesis/Opioid related bowel dysfunction as well as complications of systemic motility disorders with an emphasis on Scleroderma.

Stephen B Hanauer

Professor of Medicine (Gastroenterology and Hepatology)

Crohn's disease and Ulcerative Colitis

Emanuelle A Bellaguarda

Assistant Professor of Medicine (Gastroenterology and Hepatology)

Inflammatory bowel disease (Crohn's disease and ulcerative colitis), therapeutic drug monitoring, clinical trials

Greg S Cohen

Clinical Associate Professor of Medicine (Gastroenterology and Hepatology)

Dr. Cohen practices General Gastroenterology with additional special focuses on Crohn's Disease, Ulcerative Colitis, and non surgical treatment of hemorrhoids. Dr. Cohen is originally from Potomac, Maryland. He completed his undergraduate work at Cornell University and medical school at the University of Maryland. Dr. Cohen moved to Chicago in 1998 where he completed his residency at Northwestern followed by a 4 year combined clinical and research GI fellowship under an NIH training grant at the University of Chicago. He has been in practice at Northwestern since 2005. Dr. Cohen is board certi...

Laura H Yun

Assistant Professor of Medicine (Gastroenterology and Hepatology)

Inflammatory bowel disease, Crohn's disease and Ulcerative colitis Women's Health issues in Gastroenterology

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Diversity and Inclusion

The department works toward an environment of inclusion and support through the Diversity and Cultural Affairs Council and through several dedicated events and initiatives.

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Housestaff Research Portal

Physician-Scientist Training & Resources

We offer a wide range of resources, mentorship opportunities and formal training programs to help our residents and fellows excel as physician-scientists. Explore all of the resources and hear from housestaff who are making research a major part of their career development plans.

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Contact MaryPat Mauro for more information on supporting the Division of Gastroenterology and Hepatology at 312-503-1090 or marypat.mauro@northwestern.edu