Northwestern University Feinberg School of Medicine
Department of Medicine

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.

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Arvydas D Vanagunas, MD

Professor of Medicine (Gastroenterology and Hepatology)

Endoscopic ultrasound, Ulcer disease

Daniel R Ganger, MD

Professor of Medicine (Gastroenterology and Hepatology) and Surgery (Organ Transplantation)

Assessment of liver disease in patients with congenital heart disease.

Stephen B Hanauer, MD

Professor of Medicine (Gastroenterology and Hepatology)

Crohn's disease and Ulcerative Colitis

A Aziz  Aadam, MD

Assistant 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...

Ikuo  Hirano, MD

Professor of Medicine (Gastroenterology and Hepatology)

Eosinophilic Esophagitis, Eosinophilic Gastroenteritis, Esophageal motility disorders, Gastroesophageal reflux disease, Swallowing disorders

Steven L Flamm, MD

Professor of Medicine (Gastroenterology and Hepatology) and Surgery

Hepatic disease, Hepatitis B and C, Viral infections

Nirmala  Gonsalves, MD

Associate 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

Greg S Cohen, MD

Clinical Assistant 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 cer...

Marie-Pier  Tetreault, PhD

Assistant Professor of Medicine (Gastroenterology and Hepatology)

The Tetreault Lab uses novel mouse models and three-dimensional organotypic culture to delineate the reciprocal contributions of the epithelium and the microenvironment to inflammatory diseases of the gastrointestinal tract. Our research program focuses on diseases of the esophagus, which are among the most common ailments in the United States and throughout the world, resulting in significant morbidity, mortality, and health care expenditures. Understanding the molecular mechanisms underlying esophageal disease pathogenesis is crucial and will lead to considerable improvements in the diagn...

Christian G Stevoff, MD

Assistant Professor of Medicine (Gastroenterology and Hepatology)

General gastroenterology

Contact Us

We welcome your questions and comments.

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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

Graduate Research Resources

We offer a wide range of resources, mentorship opportunities and training 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.

Visit the Housestaff Research Portal

Giving

We invite your philanthropic partnership in helping us achieve our research and teaching missions each day.

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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

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