Colorectal Cancer Surgeons, Oncologists and Radiologists

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.

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 Physicians

Colorectal Surgery

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

Carrie Peterson, MD

Timothy J. Ridolfi, MD, MHS

Surgical Oncology

Kathleen K. Christians, MD

Edward J. Quebbeman, MD, PhD

Medical Oncology

Paul S. Ritch, MD

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

Meena Bedi, MD
Medical College of Wisconsin Radiation Oncologist

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

Maureen Donovan
New Patient Coordinator

Katarzina Krynicka, RN,
Clinic Nurse

Jennifer Geurts, MS, CGC
Genetic Counselor

Lori Sadowski, NP
Medical Oncology Nurse Practitioner

Susan Thorson, NP
Radiation Oncology Nurse Practitioner

Academic Publications


For colorectal cancer treatment:

  • 414-805-0505
Request AppointmentView Treatment Team


Clinical Cancer Center, Froedtert Hospital 9200 W. Wisconsin Ave.
Milwaukee, WI 53226

Cancer Network