Sunset over the University Hosptial and Rogel Cancer Center

Division of Colorectal Surgery

The U-M Medical School Department of Surgery Division of Colorectal Surgery treats benign and malignant conditions of the small bowel, colon, rectum and anus, using both open and laparoscopic surgical techniques.

We provide multidisciplinary care through the U-M Rogel Cancer Center and the Michigan Bowel Control Program. Our goal is to provide individualized care for each patient, including the education and support they need to heal over time.

Clinical Care

Our approach relies on a team of multidisciplinary experts, including colorectal surgeons, oncologists, radiologists and others to provide patients with colorectal diseases and conditions the best possible care. We have specialized expertise in treating colon and rectal cancers, including complex resections where cancer has metastasized to nearby organs. 

Our surgeons also work closely with a variety of experts to provide surgical services for Crohn’s disease, ulcerative colitis, constipation, fecal incontinence and other pelvic floor disorders. We also offer colonoscopies and endorectal ultrasounds to diagnose, screen and monitor colorectal conditions. 

Education

Surgery trainees who rotate on our service get a comprehensive education on all aspects of colorectal surgery and learn how to manage everything from routine cases to more advanced, complex diseases. 

Our surgeons partner with Trinity Health to train fellows in the Colon & Rectal Surgery Fellowship.

Apply

Learn more about the Colon & Rectal Surgery Fellowship application process.

Research

Our division is known for research centered on quality improvement in colorectal cancer surgery, as well as global surgery initiatives aimed at elevating colon and rectal surgery specialists to the highest standards, equipping them to deliver safe and top-tier care.

Division Leadership

John Byrn, MD

John C Byrn, MD

Cyrenus G Darling Sr M.D. and Cyrenus G Darling Jr M.D.
Professor of Surgery
Clinical Professor of Surgery
Medical Director
Medical School

Division Faculty

Calista M. Harbaugh

Calista M Harbaugh, MD, MS

Assistant Professor of Surgery
Associate Chair
Department of Surgery
Medical School
 Gifty Kwakye, MD

Gifty Kwakye, MD, MPH

Arthur W Fleming M.D. Research Professor
Clinical Associate Professor of Surgery
Assistant Dean for Clinical Medical Education
Medical School
Alisha D. Lussiez

Alisha D Lussiez

Clinical Assistant Professor of Surgery
Medical School
Dr. Scott Regenbogen

Scott Ellis Regenbogen, MD, MPH, FACS, FASCRS

Professor