Harry J Wasvary, MD, FACS, FASCRS
Dr. Wasvary is a board-certified colon and rectal surgeon with over 20 years experience. He treats a variety of benign and malignant disorders, and enjoys employing minimally invasive techniques. He is an Associate Professor of Surgery at Oakland University William Beaumont School of Medicine. He also serves as the Chief of Colon and Rectal Surgery at Corewell Health East in Royal Oak, and is the Director of the Royal Oak Corewell Health Multidisciplinary Colorectal Tumor Clinic.
Jason K Shellnut, MD, FACS, FASCRS
Dr. Shellnut is board-certified in both General Surgery and Colon and Rectal Surgery. He specializes in Robotic Colon and Rectal Surgery as well as endoscopic procedures for screening and surveillance of colorectal cancers. Dr. Shellnut also serves as the Associate Director of the Endoscopic Unit at Corewell health, and is an Assistant Professor of Surgery at the Oakland University William Beaumont School of Medicine.
Matthew A Ziegler, MD, FACS, FASCRS
Dr. Ziegler is a board-certified general and colon and rectal surgeon, who specializes in robotic and laparoscopic surgery, as well as screening and surveillance colonoscopies. Dr. Ziegler commonly treats colorectal cancer, diverticulitis, inflammatory bowel disease and anorectal disorders including hemorrhoids, fissures, abscesses, and fistulas. In addition, he serves as the program director for the Corewell Health Colon and Rectal Fellowship training program.
Claire E Peeples, MD, FACS, FASCRS
Dr. Peeples is a board-certified general and colon and rectal surgeon, who joined OCRA in 2016. She specializes in robotic and laparoscopic surgery, as well as endoscopic procedures for screening and surveillance of colon and rectal cancers. Her clinical interests include pelvic floor dysfunction (fecal incontinence procedures), benign anorectal problems and screening and surveillance techniques for anal cancers. In addition, she is an Assistant Professor of Surgery for the Oakland University William Beaumont Medical School.
John C Bauman, MD, FACS, FASCRS
Dr. Bauman is a board certified colon and rectal surgeon who joined Oakland Colon and Rectal after completing Colorectal Fellowship at Beaumont Health in 2020. He currently specializes in laparoscopic and robotic minimally invasive colon surgery, and treatments of colon and rectal cancers. Like his partners, he offers colon cancer screening and surveillance colonoscopies.
Bradley Krasnick, MD
Dr. Krasnick is a Detroit-area native, who joined Oakland Colon and Rectal after completing Colorectal Fellowship in 2023 at The Ohio State University. He has interests in minimally invasive surgery, colon cancer screening and surveillance and treatments of anorectal disorders.
Ginger Kleinert, Office manager
Ginger is the glue that holds us together. She makes sure we all have what we need, and helps our patients when they need assistance.
Alexandra Wolfe, Nurse Practitioner
Allie grew up in southeast MI, and graduated from Wayne State Nursing in 2016. She then worked in the ICU at the Detroit Medical Center, and then as a travel RN in Dartmouth. During the pandemic, she went back to school to become a nurse practitioner through the University of Michigan. She worked in the post-anesthesia recovery room at Corewell Royal Oak for over three years before starting at OCRA! We are fortunate to have her on the team.