Dr. Karl Brenner, MD
Internal Medicine
4200 Whitehall Dr, Suite 130
Ann Arbor, MI 48105 Directions
4.8 out of 5
537 verified ratings
537 Ratings, 157 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.
Jan 22, 2026
He is connected to so many doctors at Trinity and knows which one best to refer me to when needed
Jan 20, 2026
listened to all my concerns and considered them carefully
Jan 14, 2026
Dr. Karl Brenner has been my doctor for several years and I highly recommend him
Jan 13, 2026
Dr. Brenner was not easy to talk with, sometimes I felt like he was having a conversation with himself. I don't think he completely heard me with what I was experiencing.
Jan 12, 2026
Dr. Brenner is great! He always gives me the best suggestions in maintaining my health and especially my diabetes.
Jan 12, 2026
He was 30 minutes late after my appointment time before trying to connect with me
Jan 6, 2026
I liked Doctor Brenner and the staff. They were all great! I'm feeling better already. Thank you, Doctor Brenner!
Jan 6, 2026
The only. Problem was they the office had me scheduled but I was scheduled as Video and filled all the paperwork on line but when it came time to video they didn’t know where I was. They called and eventually Dr Brenner called me on phone and he acted very professional and ordered scripts I needed. He was patient even though I know he had to work me in. I felt sorry for him. He made it work.
Dec 23, 2025
Easy to talk with. Understands my issues.
Dec 19, 2025
Long term OCP for me.
We organized the team to take care of various needs for my diabetic type 2Z state which included a pharmacist an ophthalmologist of wound care, doctor and a dermatologist. We share data in milestones to improve my care. Modified medicines as recommended by the farm D Reem in movement toward controlled care. I was blessed to have this team work with me.
Dec 16, 2025
All good from check in process, to nurse who talked to me first, to session with Doctor, and finally with check out.
Dec 16, 2025
Familiarity with him staff is comforting.,His nurse is an ally. And of course my pharm D contributes to well being. And sense of team care.
Dec 8, 2025
He is an excellent doctor.
Dec 8, 2025
very helpful
Dec 4, 2025
Came in to discuss symptoms related to perimenopause and was quickly dismissed. He rarely looked up from his computer, and only spe about 10 min semi listening to me and when I mentioned wanting options to help with unexplained weight gain he acted like he never heard me and said “ok well I have a virtual visit to get to” and basically dismissed me. He also said he was putting in a referral to gyno and upon looking at the referral he never listed the Dr name he was referring me to so I had to research that myself to get to the right person.
Nov 20, 2025
Dr. Brenner listened very attentively.
Nov 19, 2025
Very cool doctor.
Nov 18, 2025
Considerate caring physician
Nov 18, 2025
Keep up the GREAT WORK!!!
Nov 17, 2025
He was concerned with my new symptoms, and ordered appropriate testing and even the CT was ordered stat to get it done in a timely manner
Nov 6, 2025
Dr. Brenner demonstrates exceptional clinical experience and judgment. His comprehensive review of all systems is consistently thorough, and the clear, confident guidance he provides based on his analysis highlights his significant expertise. In summary, Dr. Brenner provides outstanding, well-informed clinical direction.
Oct 30, 2025
I think Dr. Brenner is an EXCELLENT doctor. I'm glad he's my physician!
Oct 28, 2025
Always ready to help with the best solution that work for my condition
Oct 27, 2025
im thankful that dr. brenner is my physician:)
Oct 23, 2025
He's overall good but there a couple visits where his offerings sound alarmist - a complete change in a recent visit prior or even after the visit.
Oct 16, 2025
He treated me in a respectful manner and explained my condition and test results.
Oct 14, 2025
Dr Brenner has my confidence and trust. He and his staff provide 10 out of 10 health care.
Greg Garwood
Oct 13, 2025
Dr Brenner is a "10 out of 10". He is organized, prepared, on-time, and has an excellent support staff. He has my confidence, and I will continue to recommend himwhenever I have the opportunity. He has earned it.
Oct 3, 2025
Dr. Brenner is a wonderful person who listens clearly to the issues you want to discuss. He explains everything clearly and is never in a rush during visits.
Sep 29, 2025
Dr. was prompt, thorough, and informative.
Sep 29, 2025
Dr, Brenner listened carefully to my description of symptoms and questions, then provided several options for treatments and medicines to addres my condiction. He's thoughtful and supportive in providing advice and gives clear instructions for next steps. He's also very proactive in ordering tests and provided feedback within 24 hours with comments on test results. My wife and I both see Dr. Brenner and have been delighted with the care he provides.
Sep 25, 2025
very knowledgeable
Sep 23, 2025
understands me
Sep 23, 2025
Thank you very much!
Sep 11, 2025
I`m thankful that he is my primary Doctor
Sep 9, 2025
Very Good listener and is a excellent clinician
Sep 2, 2025
I really appreciate Dr Karl Brenner - very good doctor
Aug 25, 2025
Been his patient for years. He’s very thorough.
Aug 14, 2025
Listens to questions and answers them so that you understand.
Aug 7, 2025
Dr Brenner always nice and helpful, empathetic and friendly. Thank you!!!
Aug 5, 2025
I was seen several times before receiving correct diagnosis and treatment
Jul 31, 2025
after a stress test and calcium heart scan, I feel confident that I am headed in the right direction, and can carefully maintain good heart health.
Jul 31, 2025
Excellent doctor
Jul 26, 2025
I appreciate the care that I receive from IHA and Dr. Brenner.
Jul 21, 2025
This visit was a waste of time. I normally see a different PCP but came in to see him for immediate needs. He seemed irritated that he had to see me. Didn't give me any suggestions. Told me to come back in 6 weeks and have some blood work done. Didn't seem to understand why I was there. No eye contact whatsoever. Complete waste of time.
Jul 17, 2025
Great
Jul 15, 2025
Love communication thru portal when needed
Jul 11, 2025
Excellent doctor and staff. Very efficient and knowledgeable. They work well together.
Jul 10, 2025
I have been a patient with Dr.Brenner for many years. He is an excellent doctor. He is always friendly, informative, and helpful with advice.
Jul 9, 2025
Patient, listens, explains well, and proactively resolves issues including secondary issues that weren’t part of the principle reason for scheduling the appointment.