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Gastrointestinal Cancer Clinical and Research Faculty


Co-Division Head/Director, Phase I Program

Wells A. Messersmith, MD
Professor/Co-Division Head/
Director, GI Oncology Prog​ram

John Arcaroli, MS, PhD

Assistant Professor



Todd Pitts, MS

Research Instructor



W. Thomas Purcell, MD, MBA     Associate Professor/
Executive Medical Director, Oncology Services

Madeleine Kane, MD, PhD




Mary Kay Schultz, MSN, NP


Stephen Leong, MD

Associate Professor



Aik Choon Tan, PhD

Associate Professor,

Anne Leyba, MSN, NP




John Tentler, PhD

Associate Professor



Christopher Lieu, MD

Assistant Professor              

Colin D. Weekes, MD, PhD

Associate Professor​

University of Colorado Denver

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