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John Walling, Jr., DO, FACOI

Dr. Walling retired from the Digestive Health Institute in 2025.  He received his medical degree from the University of Health Science in Kansas City, Missouri. He completed his Internship at Mt. Clemens General Hospital. His Residency training and Fellowship in Gastroenterology were done at Botsford General Hospital in Farmington Hills, Michigan. Dr. Walling is board-certified in both Internal Medicine and Gastroenterology. He has been practicing in the Lansing area since 1992.

What Our Patients Are Saying

Excellent
Digestive Health Institute | Gastroenterology
Based on 2632 reviews
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Dennis E.
I've been overwhelmed with my condition but the Dr's here are doing everything they can to slow progression down and they listen to what I say instead of shutting me down and believing only their opinions matter this place rocks
Barbara M.
I am very impressed by Scott Z.
Jim B.
Good doctor, straight to the point, informative, and quick....👍
Vicki R.
I have recently found out I have cirrhosis of liver. Jonathan thelen is who I see. He has spent time with me answering my questions. He is very kind, professional and understanding. He is staying on top of my well being.
Ron S.
Scott always listens to my comments, answers my questions and then gives his professional observations and recommendations. Very satisfied.
Aaron C.
I received a call from Amanda, to schedule a procedure this morning. I was unable to schedule, due to an insurance issue, but want to give Amanda and the scheduling team alone a five star review. The care she showed was above and beyond, and is very much appreciated. If the organization hires and retains people like her, I can only imagine the quality of care received. Helpful, kind, and caring is what I would describe. Pure professionalism and class. I can't thank her enough.
njillr
From front desk through exam room professional staff, all were pleasant and efficient and after listening to my concerns, followed up with information and. necessary appointments.
Stephanie
Leslie is a wonderful doctor and she totally cured a disease I had I can't thank her enough!
Theresa B.
Leslie Thelen PA was amazing . She helped me with what I was referred to her for and another issue that I've been having for 10 years with no answers. She's trying hard to help me find answers for the issue I'm having. I very much appreciate her. She is very understanding and actually listens to her patients and tries very hard to help.
Carl B.
Patent focused care! I felt listened to and cared for! All concerns addressed!
5 Stars
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