Expert Care for Colorectal ConditionsTrusted by Patients, Respected by Peers

WELCOME TO Oakland Colon and Rectal Associates P.C.

Founded in 1976, Oakland Colon and Rectal Associates P.C. is the office of Drs. Harry Wasvary, Jason Shellnut, Matthew Ziegler, Claire Peeples, John Bauman, and Brad Krasnick. All of our physicians are Board Certified in General Surgery as well as Colon and Rectal Surgery and are on the staff at Corewell East William Beaumont University Hospital.

Featured Services Diagnosis and Treatments

Disease We Treat

Services We Offer

Harry J Wasvary, MD, FACS, FASCRS

Surgeon

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.


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Meet the Team

Jason K Shellnut, MD, FACS, FASCRS

Surgeon

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.

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Meet the Team

Matthew A Ziegler, MD, FACS, FASCRS

Surgeon

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.

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Meet the Team

Claire E Peeples, MD, FACS, FASCRS

Surgeon

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.

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Meet the Team

John C Bauman, MD, FACS, FASCRS

Surgeon

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.

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Meet the Team

Bradley Krasnick, MD

Surgeon

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.

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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.

Meet the Team

Testimonials Patient Reviews

“

The whole staff was wonderful from beginning to end. Very competent doctor. Clean facility, that matters to me. Dr. Peeples is amazing! Thank you 💕

By Linette P.

I see Dr. Shellnut and he is an incredible doctor. He always takes the time to listen to me and my needs and is so kind. I highly recommend him to anyone who is looking for a highly attentive doctor and someone who pays close attention to detail.

By Chantell M.

I was referred to Oakland Colon and Rectal by my PCP . I saw Dr Bauman and was very pleased with the care I received. Besides a colonoscopy, he performed two EUA’s with outpatient surgery at RO Beaumont. I really appreciate the time he took to explain my issue and even more importantly he listened to and addressed my questions and concerns.

By George K.

 

 

She truly cares about her patients. I have seen many doctors over the years for my Crohn’s Disease and not until I saw Dr. Peeples did I feel she was listening and ready to take action. I am now in remission and I have her to thank. I highly recommend Dr. Peeples. The best!

By Laura C.

Dr. Shellnut is very attentive. He listens to his patients. My intestines had gone dormant due to abdominal surgery. The only way to wake them up is to walk. That was my ticket to get out of the hospital. When I had major problems with the main hall on 6-north in COREWELL-BEAUMONT Hospital being completely blocked, one call to his office got the hallways cleared the next day. The "clean-up" however, only lasted 8 days.

By James D.

Absolutely phenomenal experience here. I saw their NP and she was so helpful and explained everything thoroughly. I was a new patient and they saw me 30 minutes after I called. They should teach other practices how to run a successful medical practice.

By Derek T.

Dr. Bauman took care of my mother who had a ruptured diverticula--she's had two surgeries by him. He is very thorough, takes as much time as is needed to explain things and answer questions, and is an extremely polite and kind young man. If you have a bowel problem and want a caring doctor, this is your guy. He is an excellent doctor, I highly recommend him.

By J.F.

Dr. Ziegler is heaven sent! He put me back together, I am still in my healing stages but everything is going well. He performed a colostomy reversal and I am very grateful for him. After my surgery he checked on me each day, the follow up appointment was a success. He’s amazing!!

By India

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