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; Gastroenterology

Moamen M. Gabr, MD

Moamen M. Gabr, MD

Director, Endoluminal Surgery; Gastroenterology

Douglas Pleskow, MD

Clinical Chief, Gastroenterology

Mandeep S. Sawhney, MD

Director, Therapeutic Endoscopy; Endoscopy Research; Gastroenterology

Radiation Oncology

Matthew Abrams, MD

Radiation Oncology


Muneeb Ahmed, MD

Muneeb Ahmed, MD, FSIR

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

Salomao Faintuch, MD

Salomao Faintuch, MD, FSIR

Clinical Director, Interventional Radiology; Vascular & Interventional Radiology; Diagnostic Radiology

Robert A. Kane, MD

Abdominal Radiology

Gerald Kolodny, MD

Nuclear Medicine; Diagnostic Radiology

Karen S. Lee, MD

Director, Radiology Fellowship Training Programs; Diagnostic Radiology

J. Anthony Parker, MD, PhD

Nuclear Medicine

Bettina Siewert, MD

Executive Vice Chair, Radiology; Diagnostic Radiology

Martin P. Smith, MD

Director of Community MRI; Interventional Radiology; Diagnostic Radiology

Jesse L. Wei, MD

Clinical Director of CT; Neuroradiology; Interventional Radiology; Diagnostic Radiology

Surgical Oncology

Colon and Rectal

Thomas Cataldo

Thomas E. Cataldo, MD

Colon & Rectal Surgery; Surgery


Vanessa L. Cowan, MD


Amy R. Evenson, MD, MPH, FACS


Kristin E. Raven, MD, FACS



Mark P. Callery, MD, FACS

Chief, General Surgery


Kanchan Kantekure, MD