Dr. Mark A. Jonker, MD

Surgery, Bariatric

620 Byron Rd, Suite 1200

Brighton, MI 48114 Directions

(517) 545-6011

ihacares.com

4.9 out of 5

147 verified ratings

147 Ratings, 31 Comments


The following ratings and reviews are based on verified feedback collected from independently administered patient experience surveys. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy.
Jun 27, 2025
All good

May 16, 2025
My first encounter with Dr. Jonker was for an emergency appendectomy. He was the surgeon on that call that day and I’m so glad, as I later learned he was a bariatric surgeon. I wasn’t too familiar with bariatric surgery so when I went for my appendectomy follow-up, I was able to ask some questions and get to know him better. In our later meetings, Dr. Jonker proved to be very kind, compassionate, patient, and he had a great way of explaining things so that I could understand the process of how a SADI-S worked. I had absolutely zero qualms about having this surgery with him using a robot-assisted machine. My follow-up care has been exactly as expected - wonderful. I lost 81% of my excess weight using the SADI-S, which was his ultimate recommendation based on my presentation. I’ve maintained the loss for three years now following his guidelines and my health has corrected itself substantially (as proven by bloodwork). Perhaps the initial appendectomy was the best thing to happen to me, as the ultimate result of it completely changed my life. Thanks to Dr. Jonker I am finally enjoying living life! I couldn’t praise him enough for his skill and friendly bedside manner.

May 1, 2025
I do not answer surveys so for me to even respond to this says a lot Look foward to seeing all again

Apr 25, 2025
All interactions were a nice experience

Apr 18, 2025
This was just for a check up to the surgery, and this being my first surgery, could not have went more smooth. Happy with the whole staff.

Mar 3, 2025
Dr Jonker repaired my umbilical hernia. Everything turned out very well. I couldn't be more pleased with the way I was treated and his skill as a surgeon.

Feb 26, 2025
The provide/Dr. Jonker & staff were excellent.

Jan 24, 2025
Would recommend 100% with my experience so far.

Dec 16, 2024
I never felt rushed and all my concerns were addressed

Dec 2, 2024
Great job!

Nov 4, 2024
Dr. Jonker is an excellent bariatric surgeon, and best of all, very humble.

Nov 1, 2024
Outstanding experience!

Oct 11, 2024
Absolutely love the doctors and nurses at Trinity Health!!

Oct 7, 2024
Always thoughtful and cares for his patients

Sep 21, 2024
I was lucky to have Dr. Jonker do my emergency appendectomy. He explained everything and made me feel at ease. My follow-up visit was great. He answered all my questions and I feel he really cared about me as a person.

Aug 19, 2024
Always prepared and ready with answers.

Aug 1, 2024
The provider was courteous and understanding, never talked down to me

May 26, 2024
Dr. Jonker is caring and understanding. Listened will to my concerns. His staff is so helpful too.

Apr 9, 2024
Excellent surgeon, I've had an excellent outcome, would 100% recommend!

Mar 26, 2024
Very nice people!

Feb 29, 2024
Dr Jonker and his team are the best

Feb 6, 2024
I’ve had nothing but excellent experiences with Dr. Jonker. His calm and collected demander is very relatable for me and makes me feel comfortable. I love that I never feel rushed with Dr. Jonker, either. I feel listened to and respected, and we always have plenty of time to go over questions, which I never feel silly for asking. 10/10 would recommend.

Feb 5, 2024
I love that I never feel rushed with Dr. Jonker, I feel listened to and respected.

Jan 22, 2024
Warm and genuinely concerned

Jan 2, 2024
Good bedside manner

Dec 22, 2023
Very happy with care i received.

Dec 11, 2023
Overall great surgeon/doctor.

Dec 4, 2023
I would recommend anyone I love to go to Trinity. The care I received was bar none!

Nov 30, 2023
Dr is very personable

Nov 28, 2023
I am happy and grateful for the oportunitty to have the procedure with them.

Nov 7, 2023
Dr.Jonker is an outstanding physician, I am extremely pleased with all my direct contact with him. I am unhappy with others in his office