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Program Specialists

Hepatobiliary and Pancreatic Surgery Program Specialists

Our multidisciplinary team of pancreatic cancer physicians and speciaists — each an expert in their field — work together to treat each patient individually.

Hepatobiliary and Pancreatic Surgery Program Coordinator

Areli Nunez, BS


John Allendorf, MD, FACS, Vice Chairman, Surgery and Chief, Division of Surgical Oncology and Endocrine Surgery
Megan Winner, MD
Irene E. Rossmer, MD

Gastroenterology and Biliary Endoscopy

Stavros N. Stavropoulos, MD
David Friedel, MD
Jessica Widmer, DO


James Grendell, MD, Chief, Division of Gastroenterology Hepatology and Nutrition

Medical Oncology

Alexander Hindenburg, MD
Prashanti Atluri, MD


Galina Levin, MD

Radiation Oncology

Jonathan Haas, MD, Chairman, Radiation Oncology
Michael Repka, MD
David Ebling, MD
Todd Carpenter, MD

Interventional Radiology

Man Hon, MD
Jason Hoffman, MD
Nicholas Georgiou, MD

Genetics and Prevention

Melanie McDermott
Jamie Tramontana


Lisa Zhao, MD
Mala Gupta, MD

Nurse Practitioners

Barbara Moskowitz, Surgery, NP Surgery
Elizabeth Marchand, Oncology, NP Oncology
Chana Josovich, NP Surgery

Clinical Nutritionist

Arlene Stein, MS, RD, CNSC

Nurse Navigator

Christine Guarnieri, MSN, RN-BC, OCN