Our Gastrointestinal Cancer Team

The activities of our gastrointestinal cancer specialists are integrated through a multispecialty clinic, where you will be seen regularly and clinicians will regularly review your progress. Our staff includes expert medical oncologists, surgeons, gastroenterologists, radiologists, radiation oncologists, nurses, social workers and nutritionists.

Medical Oncology


Andrea Bullock, MD

Andrea J. Bullock, MD

Medical Oncology


Bruno Bockorny, MD

Medical Oncology


Mary Linton Peters, MD

Medical Oncology

Ahmed Rattani, MD

Ahmed Rattani, MD

Instructor, Medicine, Harvard Medical School

Jessica A. Zerillo, MD, MPH

Medical Oncology

Advanced Practice Providers
Female Doc Silhouette

Catherine Conahan, NP

Medical Oncology

Carol Pilgrim, NP

Carol Pilgrim, NP

Inpatient Palliative Care

Adrienne Terra

Adrienne Terra, NP

Medical Oncology

Interventional Gastroenterology

Tyler Berzin, MD, MS

Director, Advanced Endoscopy Fellowship Program

Moamen M. Gabr, MD

Moamen M. Gabr, MD

Director, Endoluminal Surgery; Gastroenterology

Douglas Pleskow, MD

Chief, Clinical Gastroenterology

Mandeep S. Sawhney, MD

Director of Therapeutic Endoscopy; Endoscopy Research

Radiation Oncology

Matthew Abrams, MD

Radiation Oncology


Muneeb Ahmed, MD

Muneeb Ahmed, MD, FSIR

Chief, Vascular & Interventional Radiology; Vice Chair of Interventional Services

Salomao Faintuch, MD

Salomao Faintuch, MD

Vascular & Interventional Radiology

Robert A. Kane, MD

Abdominal Radiology

Gerald Kolodny, MD

Nuclear Medicine and Molecular Imaging

Karen S. Lee, MD

Abdominal Radiology; Body MRI; Emergency Radiology; Director, Radiology Fellowship Training Programs

J. Anthony Parker, MD, PhD

Nuclear Medicine and Molecular Imaging

Bettina Siewert, MD

Executive Vice Chair, Radiology; Abdominal Radiology

Martin P. Smith, MD

Director of Community MRI; Abdominal Radiology; Body MRI; Community Network Services

Jesse L. Wei, MD

Clinical Director of CT; Abdominal Radiology; Body MRI

Surgical Oncology

Colon and Rectal

Thomas Cataldo

Thomas E. Cataldo, MD

Colon and Rectal Surgery


Jonathan F. Critchlow, MD, FACS

General Surgery

Daniel Jones, MD, MS, FACS

Chief, Minimally Invasive Surgery and Bariatric Surgery


Vanessa L. Cowan, MD


Amy R. Evenson, MD, MPH, FACS


Kristin E. Raven, MD, FACS



Mark P. Callery, MD, FACS

Chief, General Surgery

A. James Moser, MD

Co-Director, Pancreas and Liver Institute


Kanchan Kantekure, MD