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Department Gastroenterology, Hepatology & Nutrition
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English, Hebrew, Spanish
Surgeon No
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus

Specialties & Treatments

Treatment & Services

  • Colonoscopy
  • Egd
  • Endoscopy
  • Esophageal Band Ligation
  • Flexible Sigmoidoscopy
  • Ileoscopy
  • Polypectomy
  • Pouch Center
  • Pouchoscopy
View all 9 Treatment & Services +

Specialty in Diseases & Conditions

  • Celiac Disease (Celiac Sprue)
  • Collagenous Colitis
  • Crohn's Disease
  • Eosinophilic Gastroenteritis
  • Inflammatory Bowel Disease (IBD)
  • Microscopic Colitis
  • Ulcerative Colitis
View all 7 Specialties +


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About Aaron Brzezinski, MD

Aaron Brzezinski, MD, was born in Mexico City and attended medical school at the Universidad Nacional Autonoma de Mexico, receiving his degree in medicine in 1981. He performed his postgraduate training in internal medicine at Hospital Espanol in Mexico City. Dr. Brzezinski moved to Toronto, Canada, to continue training with a residency in internal medicine and a fellowship in gastroenterology. He performed research for one year with Dr. Nicholas Diamant, and completed a special fellowship in inflammatory bowel disease and performed clinical research under Dr. Kursheed Jeejeebhoy and Dr. Jeffrey Baker at the University of Toronto.

Dr. Brzezinski is certified in internal medicine and in Gastroenterology in Canada and the United States, and in 1992 started to work in the Department of Gastroenterology and Hepatology at Cleveland Clinic as Assistant Staff. In 1994, he became a Staff Gastroenterologist.

Through the years, Dr. Brzezinski has been either principal investigator or sub-investigator in numerous clinical trials and has published in peer-reviewed journals and written numerous book chapters. He has lectured extensively within the United States and internationally in Argentina, Brazil, Chile, Dominican Republic, Ecuador, Guatemala, Mexico, Spain and Turkey.

Dr. Brzezinski actively participates in teaching medical students, residents and fellows. His clinical practice is almost exclusively in inflammatory bowel disease, microscopic colitis and celiac disease. Besides seeing patients in the office, he also performs upper endoscopy (EGD) and colonoscopy.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - University of Toronto Faculty of Medicine
Internal Medicine

Residency - University of Toronto Faculty of Medicine

Medical Education - Universidad Nacional Autonoma De Mexico
Mexico, Mexico

Professional Highlights

  • Bruce Stewart Fellowship Award
  • Premier Physician Award, Crohn's and Colitis Foundation of America, Northeast Ohio Chapter
  • Best Doctors in America


  • Internal Medicine - Gastroenterology

Specialty Interests

Celiac Disease, Crohn's Disease, IBD including Ulcerative Colitis and Crohn's, Inflammatory Bowel Disease, Ulcerative Colitis

Awards & Honors

  • Honorable Mention, Dean's List, Universidad Nacional Autonoma de Mexico, 1980 
  • Elsie Watt Fellowship, Department of Medicine, Toronto Western Hospital, 1987 – 1988
  • Jean Hogarth Springer Postgraduate Fellowship, Faculty of Medicine, University of Toronto,
    1987 – 1988 
  • International Physician of the Year, International Center, Cleveland Clinic, 1998
  • Bruce Stewart Fellowship Award, Cleveland Clinic, 2002 – 2003  
  • Premier Physician Award, Crohn's and Colitis Foundation of America, Northeast Ohio Chapter, 2003
  • Physician of the Year, Department of Gastroenterology and Hepatology, Cleveland Clinic, 2004
  • Best Doctors, Cleveland magazine, 2004 – 2008
  • Best Doctors in America, 2004 – 2008


  • American College of Gastroenterology
  • Royal College of Physicians and Surgeons of Canada
  • American Gastroenterological Association
  • American College of Physicians
  • Crohn's and Colitis Foundation of America, honorary member Board of  Directors, Northeast Ohio Chapter~
Research & Publications

Research & Publications

See publications for Aaron Brzezinski, MD.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 12/13/2020, Dr. Brzezinski has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

Patient Satisfaction Reviews

171 Patient Satisfaction Reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Responses are measured on a scale of 1 to 5 with 5 being the best score.

The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.

Overall Star Ratings
4.9 out of 5
Explains 4.9
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

73 Patient Comments

Reviewed on Sep 28, 2021

Everything went great! All the doctors and nurses took good care of me when I was there. Great place to go when you need something important done.

Reviewed on Sep 21, 2021

Dr B is excellent. He's kind, caring and an excellent physician. I have been in his care for over 25 years. He's wonderful.

Reviewed on Sep 21, 2021

The 2 nurses and Dr B had a wonderful rapport

Reviewed on Sep 17, 2021

He's a very caring compassionate doctor that takes his time with patients and answers all their questions.

Reviewed on Sep 15, 2021

Dr BRZ is the most caring, compassionate physician I have had. He considers each treatment, explains pros and cons of each, and together we choose the best treatment.

Reviewed on Sep 14, 2021

Dr. B is the most interractive clinician I've ever had. I have the utmost appreciation for his generosity of time and expertise.

Reviewed on Sep 9, 2021

My procedure went smoothly. I was respected and informed throughout the process. Would definitely recommend CC and Dr. B.

Reviewed on Sep 8, 2021

Dr Brezinski is an excellent physician who has treated me for 25 years.

Reviewed on Sep 7, 2021

Great doctor! Excellent care

Reviewed on Sep 3, 2021

Best doctor I've ever had. And a phenomenal human being. I'm so grateful to have had Dr. Brzezinski as my gastroenterologist, and I'm so sad (for myself) that he'll be retiring in January.

Reviewed on Sep 3, 2021

Popular doctor so difficult to get an appointment. Prefer in person but chose video appointment so I did not have to wait as long.

Reviewed on Sep 2, 2021

My doctor has been incredibly kind, thorough and compassionate. I'm saddened to learn he's retiring but also thankful for the years he's dedicated to others. I wish him all the best and hope that he can now focus on his time with family and doing other things that he may enjoy. It's well deserved.

Reviewed on Jul 30, 2021


Reviewed on Jul 16, 2021

I have been a patient of Dr. Brzezinski for most likely 25 years or more. Dr. Brzezinski has always treated me with kindness and respect and I willMiss him upon his retirement.

Reviewed on Jul 15, 2021

My Primary Care doctor recommended a diagnostic colonoscopy due to the issues I was experiencing. I never received or resolved that my issues. The doctor said he did not find anything to be concerned about and to have another colonoscopy in 10Yrs. He told to me review a diet called FODMAP. When I received this it appearsIt appears to be a diet for you those suffering from irritable bowel syndrome. Doctor never mentioned this syndrome doctor to me. When I read the doctors report he twice referred to my twisted colon and torture doing the scope. None of this as discussed with me and I'm still having problems. I will contact my primary care doctor

Reviewed on Jul 2, 2021

He is terrific. He has been my gastric doctor for years

Reviewed on Jun 29, 2021

I've had a good experience. All nurses were very nice and helpful. The doctor is very professional.

Reviewed on Jun 29, 2021

I recommend this care provider to others

Reviewed on Jun 18, 2021

it was a very good had given me time and discussed in detail as needed

Reviewed on Jun 17, 2021

Dr Brzezinski is the best! He is caring and makes me feel heard. He truly is one of my favorite doctors. The staff also like him and talk very highly of him.

Reviewed on Jun 16, 2021

I had a very good experience at the Cleveland Clinic as always. Dr. Brzezinski was so professional kind and thorough in explaining my symptoms. He gave me assurance. I will always use the Cleveland Clinic for my healthcare when it seems a diagnosis is very serious. I will now have my colonoscopies performed at the Cleveland Clinic.

Reviewed on Jun 16, 2021

Dr. Brzezinski showed patience understanding knowledge and kindness. He listened to all my concerns and didn't rush me and let me talk as long as needed.

Reviewed on Jun 10, 2021

Dr Brzezinski did an excellent job on my colonoscopy. As always, he was thorough, professional and compassionate an excellent doctor!

Reviewed on Jun 10, 2021

Dr Brzezinski was excellent. he asked many times during my procedure how I was doing and answered any questions I had.

Reviewed on May 26, 2021

Dr. Brezinsky shows excelency in all areas. What an asset he is to the Cleveland Clinic. A seasoned and experoenced medicus, an incredible human being,, so knowledgeable, so devoted and so very caring, Noemi Landau

Reviewed on May 21, 2021

he is an excellent doctor

Reviewed on May 21, 2021

Incredible experience. He listened to everything I had to say and even had to move another patient over to spend more time with me, to really understand what was going on. I finally feel that there is hope to live normally again because of this doctor.

Reviewed on May 14, 2021

Dr bresinski always contacts me the day I call. I have been a patient of his hot over 25years. everyone I have met at the crohns foundation feel the same about him. he has improved our quality of life. and made us feel better on our worse of days. it's why we all drive so far to see him!!!!

Reviewed on May 14, 2021

I always feel better after seeing him no matter if some of the news is hard. Dr bresinski makes me feel important

Reviewed on May 14, 2021

I recommend Dr bresinski. to hundreds of people thru our new York chrons program. there is a lot of testimonials about how great of a physician heist. hats off to Cleveland for having such a great doctor! only reason most of us travel that far. mediocre care is all around us!

Reviewed on May 7, 2021

great experience tomeet with my doctor and not have to miss work to drive all the way to Cleveland Clinic.

Reviewed on May 7, 2021

Dr. Brzenzski is always a delight.

Reviewed on May 6, 2021

I have dealt with Crohn's for 30+ years. Dr B is primarily responsible for the quality of life I have. I trust him implicitly. There is no Dr who combines expertise with sincere care for his patients as does Dr B

Reviewed on May 6, 2021

The doctor spent a lot of time with me as I am a new patient. I felt listened to and that he understands my health issues.

Reviewed on May 5, 2021

the Dr. always takes his time with my health or any questions I may have. I would & have recommended him to my family & friends.

Reviewed on May 4, 2021

Dr. B Is outstanding. He is incredibly detail oriented and willing to take the time necessary to complete the procedure. His write up was easy to understand and extremely thorough.

Reviewed on Apr 22, 2021

the doctor was great and staff also

Reviewed on Apr 22, 2021

Dr Brzezinski was great

Reviewed on Apr 14, 2021

Dr. B. is a caring, professional, kind physician, who has really helped me control my Colitis.

Reviewed on Apr 9, 2021

Dr.Brzezinski is without a doubt the consummate professional!

Reviewed on Apr 8, 2021

care provider was wonderful

Reviewed on Apr 1, 2021

Dr. Brzezinski goes above and beyond to take time and go over everything thoroughly. I feel that he cares for what's best for me and that's I'm not just another number on the chart.

Reviewed on Mar 30, 2021

My doctor is one of the best doctors, very knowledgeable with great communication skills

Reviewed on Mar 22, 2021

Aaron Brzezinski has been my gastroenterologist since 1998. I consider him to be my primary care physician because he has been such a thorough doctor!

Reviewed on Mar 19, 2021

Dr Brzezinski was very thorough and patient with me. it made the whole experience much easier.

Reviewed on Mar 16, 2021

The doctor and assistants were very helpful, informative and friendly. Patient care was top notch. That is why I drive from Toledo to the Clinic. It was a great experience, just as was my other trips and surgeries here.

Reviewed on Mar 10, 2021

Dr B's office staff and he are exemplars of what the Clinic should be. Too bad other offices do not follow the lead.

Reviewed on Mar 10, 2021

the experience with the doc was great. he could not have been more caring

Reviewed on Feb 26, 2021

Even though I couldn't get the video to work, the doctor was very thorough.

Reviewed on Jan 22, 2021

I have been seeing Dr Brzezinski for a very long time now. he's wonderful

Reviewed on Jan 21, 2021

Dr. B is THE best doctor I have ever dealt with. He is professional, caring, kind and very thorough. He is also extremely knowledgeable.

Reviewed on Jan 14, 2021

Dr. Brezinski was awesome.

Reviewed on Jan 11, 2021

Dr B is awesome

Reviewed on Jan 8, 2021

Superb experience-Dr Brzezinski is an extraordinarily thorough and kind physician

Reviewed on Jan 7, 2021

Dr. Brezenski is a great Doctor. His expertise, perhaps, is on par with other specialists but his biggest difference is actually learning about my complete health situation to best answer questions and offer a diagnosis and treatment. He absolutely is just with you during the visit

Reviewed on Jan 7, 2021

Honestly, unless I have something the Dr. needs to physically examine the virtual visit and in-person visit is equally as desirable

Reviewed on Dec 24, 2020

Dr. Brzezinski is the best doctor I have ever had. He listens, cares and is very helpful.

Reviewed on Dec 22, 2020

Dr Brzezinski has been my GI for years. He has gotten me thru some of the hardest times in my life. I recommend him to everyone who needs a GI

Reviewed on Dec 17, 2020

I will never hesitate to recommend Dr. Brzezinski! Dr. Brzezinski has ALWAYS demonstrated his concern for me as his patient & his concern for me as a person. He explains options, risks & does so in a way that I, who doesn't have a medical degree, will understand. It comes down to this: The staff present to assist the doctor are stellar. The actual work was done by Dr. Brzezinski and I trust Dr. Brzezinski immensely; it's an unconditional trust. If I didn't trust him, I wouldn't be his patient.

Reviewed on Dec 14, 2020

once we figured out FaceTime, we were fine. Dr. Brzezinski is a wonderful physician. I've gone to him over 20 years.

Reviewed on Dec 10, 2020

Dr. B is one of the most competent and caring physicians I have ever met

Reviewed on Nov 24, 2020

Dr Brzezinski is the best doctor that I have had with regards to my Crohn's. He is kind, caring and very engaging during our visits. I feel taken care of and listened too. I can't begin to thank him enough!

Reviewed on Nov 10, 2020

I believe that Dr. Brzezinski is brilliant. I've suffered with my condition for many years, but since I've been seeing Dr. Brzezinski, I'm doing so much better. But beyond that, he is so thoughtful and kind. I wish all doctors were like him.

Reviewed on Nov 10, 2020

Dr. B can never retire. He is wise. He is an excellent physician. He is caring. He is soft-spoken but all-knowing. I have NEVER felt so positively about a CCF specialist. Along with my PCP -- these two physicians are why I can never even consider leaving my complex healthcare to ANY other providers. I am a Crohn's d., kidney stone pusher, and prostate cancer patient on chemo. I am blessed with Dr. B's care.

Reviewed on Oct 30, 2020

the gastro team, dr brzezinski and dr zuccaro are so caring and make sure you find quality in life.

Reviewed on Oct 26, 2020

I really liked the virtual visit and Dr. Brezezinksi offered some other ideas and medications than what my previous doctors explored.

Reviewed on Oct 26, 2020

I live an hour away from the main campus. I love having the ability to see the Dr from home and not have to risk being exposed to Covid19 as well.

Reviewed on Oct 26, 2020

dr brzezinski is the epitome of quality care at the Cleveland clinic. he listened carefully and engaged in 2 way conversation. I greatly appreciated his opinions and time spent.

Reviewed on Oct 22, 2020

He was very patient, kind and understanding of all things discussed. We're all human and we know that some of things we do in life aren't recommended or are difficult to navigate or complicated and it was very reassuring and comforting to have a Doctor who listened and tried hard to be compassionate and understanding as opposed to criticizing or disregarding your situation and feelings. On all levels, personal, medical and emotional.

Reviewed on Oct 14, 2020

Dr. B. is an exceptional physician and person, so I'm appreciative of his time on so many levels! He is very bright, caring, and takes his time to answer all questions - which makes me a better patient; as such, everyone benefits. I am extremely lucky to have found him, and would recommend him to both family and friends! Thank you, thank you Dr. B. - as you are quite special (and my husband and I deeply trust his overview)! Not many physicians have both compassion and knowledge - so he is the "total" package, working with the patient as a unique team.

Reviewed on Oct 14, 2020

Dr. B. is great, what more can I say?

Reviewed on Sep 30, 2020

Excellent experience with my doctor.

Reviewed on Sep 30, 2020

My doctor is an amazing individual. He is so caring and thoughtful. i trust his judgement.

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