Colorectal Cancer Program

Exceptional Staff

Physicians of the Colorectal Cancer Program have chosen to practice in an academic setting because they are interested in advancing the understanding of the diagnosis and treatment of colorectal cancer and related conditions. They’re dedicated to teaching not just students, but other physicians at home and across the country.

To make an appointment or for more information, call 866-680-0505 or use our online form.

All members of this specialized team focus specifically on treating colorectal cancers and on working together to provide patients with comprehensive treatment plans that incorporate the most sophisticated and effective therapies for colorectal disease.

Medical College of Wisconsin Surgeons

Colorectal Surgery

Kirk A. Ludwig, MD, FACS, FASCRS
Chief of Colorectal Sugery

Lauren A. Kosinski, MD, MS, FASCRS

Surgical Oncology

Kathleen K. Christians, MD

Edward J. Quebbeman, MD, PhD

Sam Pappas, MD

Medical Oncology

Paul S. Ritch, MD

Rafael Santana-Davila, MD
Medical College of Wisconsin Medical Oncologist

James P. Thomas, MD, PhD
Medical College of Wisconsin Medical Oncologist
Chief, Solid Tumor Oncology
Hematology and Oncology

Lauren Wiebe, MD
Medical College of Wisconsin Medical Oncologist

Stuart J. Wong, MD

Radiation Oncology

Beth A. Erickson-Wittman, MD

Tracy R. Kelly, MD

Vascular and Interventional Radiology

Robert Hieb, MD, RVT

Eric Hohenwalter, MD

Paraq Patel, MD

William Rilling, MD, FSIR

Sean Tutton, MD, FSIR

Exceptional Clinical Staff

Deborah A. Andris, MSN, APNP
Colorectal Surgery Nurse Practitioner

Robin Bortman, RN
Clinic Nurse

Nicki Davis
New Patient Coordinator

Katarzina Krynicka, RN,
Clinic Nurse

Gail Laschen
New Patient Coordinator

Laura S. Pape, MS, CGC
Genetic Counselor

Lori Sadowski, NP
Medical Oncology Nurse Practitioner

Susan Thorson, NP
Radiation Oncology Nurse Practitioner

Academic Publications