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 12/9/2019, Dr. Brzezinski has reported the financial relationships with the companies listed below. 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.

Consulting and/or Speaking. Dr. Brzezinski receives fees of $5,000 or more per year as a paid consultant, speaker or member of an advisory committee for the following companies:

  • AbbVie, Inc.

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

186 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 4.8
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

74 Patient Comments

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.

Reviewed on Sep 25, 2020

Thanks to Dr. Brzezinski I have been able to live a normal life with out discomfort or the side effects of my medical issues.

Reviewed on Sep 25, 2020

I said it before, and I say it again. Dr. B is the best doctor I have ever had. Period. He is the quintessential expert on my condition (UC), but his breadth of knowledge transcends gastroenterology. He informs me medically as a whole person, not just the underlying condition.

Reviewed on Sep 22, 2020

It was very difficult for my care provider to cover the wide range of next steps in the short amount of time we had virtually. As such, I don't think I received full clarity on what we needed to do next.

Reviewed on Sep 21, 2020

Dr Brzezinski the most thorough doctor I have.

Reviewed on Sep 15, 2020

excellent doctor

Reviewed on Sep 15, 2020

Dr. Brzezinski is always outstanding! I feel very blessed to have him as my doctor.

Reviewed on Sep 10, 2020

I have many physical ailments and many great Doctors at Cleveland Clinic but Dr Brzezinski is the most outstanding. His knowledge and sincere care for his patients is incredible. in fact, when I was out at Mayo Clinic and they found out who my Crohn's Gi was they said I had one of the best in the country. My quality of life is totally due to Dr B's care. I probably wouldn't be alive if not for him. I could never thank him enough and my family is eternally grateful.

Reviewed on Sep 1, 2020

I truly don't think there is a better fit for a doctor for me.

Reviewed on Aug 18, 2020

Doctor Brzezinski is a wonderful physician. He is kind and compassionate. His expertise is very obvious. He is patient and wants to be sure you as a patient understand and agree with the plan of care. He is top notch! Many thanks and so glad he is here at Cleveland Clinic!

Reviewed on Aug 14, 2020

Excellent Dr. explains everything and listens to my concerns!!

Reviewed on Aug 14, 2020

I have been a patient of Dr. Brzezinski for over 26 yrs. and through all those years have developed a very good relationship with great appreciation for his manner and decisions. I consider him a very good friend and advisor in my overall health & care.

Reviewed on Aug 3, 2020

I was impressed and very pleased with the thoroughness and knowledge of DR BRZEZINSKI. I felt confident and reassured that I was getting the very best care.

Reviewed on Jul 28, 2020

The Doctor was very patient and spent all the time needed to answer my questions and make sure I understood everything he was explaining to me.

Reviewed on Jul 27, 2020

Dr. Brzezinski is a fantastic doctor and person. I have been his patient for 21 years. I have always been treated very well as a patient.

Reviewed on Jul 22, 2020

excellent doctor!

Reviewed on Jul 22, 2020

one of the best video doctor visits I have ever had Dr Bresinski listened to my medical issues and medical problems I have been having with my stomach and Dr Bresinki has set me up for test to come to Cleveland to be tested to see Whst is causing my stomach and gastro issues.Can't say enough great things about Dr Bresinski I'm so thankful I got sent to a Dr like Dr Bresinski that listened to me and took the time to listen to my medical issues and Dr Bresinski is sending me for medical test. I'm very thankful and appreciative and I would recommend Dr Bresinki to anyone having any kind of gastro medical issues Thank you so much,Amber Bishop

Reviewed on Jul 6, 2020

This Physician is know throughout the GI community as the best there is.

Reviewed on Jun 22, 2020

I experienced only positive responses and results while accessing the doctor's for an appointment.

Reviewed on Jun 22, 2020

I was completely satisfied with the lengthy time spent with my doctor. It is my feeling in rating Good in Nos. 4&5 that it was too early in the process to discuss proposed treatment and decisions re my care until the results of tests were known.

Reviewed on Jun 16, 2020

Dr. Brzezinski & his staff are excellent.

Reviewed on Jun 16, 2020

Dr. Brzezinski always explains relevant information to me in terms of both treatment and prevention. I especially appreciate his dedication to ensuring that I consider preventative care, in all aspects not just GI, as this is often overlooked.

Reviewed on Jun 4, 2020

Dr Brzezinski is a very special doc...I'm so pleased to work with him re my GI issues

Reviewed on May 28, 2020

Doctor was well prepared. Was referring to my medical history as we talked through my history. Plan of action. in my opinion, was right on target. Not too aggressive, not passive....just right.

Reviewed on May 20, 2020

Dr. Brezenski was wonderful. We were a few minutes late to visit due to technical issues with pop up blocker and he did not act like it was a problem. Spent a good amount of time, clearly had reviewed records ( this is second opinion) and my Dad's GI doc that referred was able to join in on last half of visit ( we did it from her office with masks etc.) It was very helpful and might not have been able to do this under other circumstances.

Reviewed on May 20, 2020

I have been a patient of Dr. Brzezinski for 20 years. He has always given very good advise and has been a wonderful doctor! I have recommended him to many people.

Reviewed on May 19, 2020

Excellence for an Exceptional Dr.n Staff.

Reviewed on May 19, 2020

Dr. Brzezinski is the best doctor I've ever had and one of the finest human beings I've ever met.

Reviewed on May 12, 2020

I have been seeing Dr Brzezinski for over 20 years. he is always very knowledgeable, professional, kind & comforting.

Reviewed on May 12, 2020

Dr. B is the best doctor that I currently see. Great communicator with a friendly and caring disposition. I trust him 110%. He really knows his stuff.

Reviewed on Apr 13, 2020

Dr. took his time with my phone interview asking several questions and answering mine.

Reviewed on Apr 1, 2020

Dr. Brzezinski continues to provide me with the best treatment options that he can given my complex and long history of Crohn's disease. He has done everything in his power to provide me with a decent quality of life while working to maintain my current remission. His ability and willingness to think outside the box regarding treatment plans has most certainly lengthened my life. I have had Crohn's since birth. It has often been a difficult and terrifying journey. I have just celebrated my 50th birthday and I believe this is in large part to his extraordinary care.

Reviewed on Mar 30, 2020

Dr. B. is an amazing man and a wonderful physician. He is so sweet and caring and I feel very blessed that he is my doctor.

Reviewed on Mar 27, 2020

dr. always goes above and beyond and this was no different I was very pleased that day with him. I also want to give my thanks to the two nurses that were in the operating room with me we were exceptional And so professional they made me feel at ease and they need to be recognized

Reviewed on Mar 27, 2020

Dr. Brezinski is an exceptional physician in his care that day was wonderful as usual and I would definitely recommend him to others

Reviewed on Mar 26, 2020

Dr. Brzezinski and I have a great team relationship. I provide good input of my symptoms, history, and I depend on his knowledge and advice. I always feel my care is thorough and with great care / concern.

Reviewed on Mar 26, 2020

I always feel that Dr. really is concerned & very caring.

Reviewed on Mar 23, 2020

Dr. Brzezinski and his entire staff are always compassionate, caring and have my best interest at heart

Reviewed on Feb 6, 2020

doctor & NP very thorough, knowledgeable, & answered all my questions.

Reviewed on Feb 6, 2020

Good experience visiting with new doctor on recent visit at CCF.Only issue is that the appointment time was long, from 3:45 PM. till 7:00 pm.

Reviewed on Feb 3, 2020

Dr Brzezinski is by far the best, most thorough, most caring, and most compassionate doctor I have a at had!

Reviewed on Jan 29, 2020

dr Brzezinski office is amazing good with scheduling and recognizing my needs as a patient. I'm always amazed how quickly the work to meet my needs.

Reviewed on Jan 29, 2020

Dr Brzezinski is amazing with the amount of time and concern that he has withh his patients. he's among the best in the business.

Reviewed on Jan 14, 2020

This was my third colonoscopy with Dr B and I plan to use him again in the future. I feel confident with the treatment I've received.

Reviewed on Jan 13, 2020

These comments only relate to Dr. Brzezinski's office and his assistant Ms Helena Baron. Helena was prompt and very helpful in organizing my out of state visit. She is a true professional in her field. Dr. Brzezinski with his calm manner and immense expertise gained my trust and confidence. They are an excellent team.

Reviewed on Jan 3, 2020

the doctor spent time necessary to talkabout complex concerns

Reviewed on Jan 3, 2020

Best physician in his interactions with me that I have met yet through Cleveland! He took time with me and showed me images of my colon in my file that I had never seen. He gave me the best insight and understanding into my condition to date! I feel great moving forward with this Dr.

Reviewed on Jan 2, 2020

Dr. B is wonderful. The best Dr I have ever had. Takes much time with me and hears all my concerns and addresses ALL areas thoroughly

Reviewed on Dec 26, 2019

Dr. B is there best of the best. he is very thorough and insightful. He took time to review all my CT scans of my recent hospital stay and discuss them. He also listened to my concerns of lower back pain and put on an order for a test to determine if it is caused by ashesions as well. Dr. B is incredibly thorough which is needed when dealing with chronic diseases and their ongoing issues and complications.

Reviewed on Dec 24, 2019

Dr. Brzezinski really cares about his patients. He always explains everything to me and is very good at answering my questions. He also cares about my overall health, beyond just his specialty. The Clinic and his patients are lucky to have him.

Reviewed on Dec 13, 2019

extraordinary effort by Helena and Dr Brzezinski to help me when I have been at a loss for how to deal with illness. The doctor and nurse stayed long beyond their work day to problem solve and to help me. Amazing. Great kindness.

Reviewed on Dec 13, 2019

Doctor Brzezinski is very competent and thorough and compassionate.

Reviewed on Dec 13, 2019

I have never met a more caring and thoughtful provider. He was absolutely phenomenal. I felt heard, he explained things other physicians ignored, he shared thoughts and possibilities, and made time to see me last minute. I can't tell you how grateful I am and cannot stress how great my experience was.

Reviewed on Dec 13, 2019

HE WAS A AMAZING DOCTOR!! took his time and reviewed everything!! so impressed

Reviewed on Nov 27, 2019

Dr. Brzezinski is one of the most professional and caring physicians I have ever know. I have been a patient of his for over 20 years, and he has treated me with kindness and respect.

Reviewed on Nov 26, 2019

Dr. Brzezinski is the best. I always feel that he looks out for me and has my best interests in mind. He always takes as much time as needed to answer my questions.

Reviewed on Nov 26, 2019

The ease of scheduling my appointment is a constant occurrence. In close to 10 years that Dr. Brzezinski has been my doctor, he has ALWAYS kept his word; when he says he'll call, he calls. Dr. Brzezinski's staff, specifically his Executive Secretary is always on point, prompt in returning a phone call and or responding to my email. Having access to Dr. Brzezinski is and has NEVER been a problem nor a challenge!

Reviewed on Nov 26, 2019

Dr. Brzezinski is beyond courteous and respectful!! He is caring about me as a patient and as a person. As a patient, he explains his findings and recommendation(s) of treatment and does so without the fanfare of terminology that only a medical professional would understand. And when I don't understand something, not a problem, he will explain it again and never in a rush. Dr. Brzezinski has always remembered that my mother died of stomach cancer and when it comes to explaining findings, I trust him. I trust him so much that if his calendar is booked and I have to wait a little longer to see him, I'll choose to take the pain and discomfort and wait to see ONLY DR. BRZEZINSKI!! For close to ten years I have opted to travel to Cleveland to see Dr. Brzezinski than to be treated by some inept doctor in my area. It's Dr. Brzezinski to brought me back to health after I returned from a 3 year work assignment in the Middle East...doctors in VA/DC were playing a guessing game. I owe my health to him and the fact that he figured out what was wrong is proof that he knows what he's doing, he cares about keeping me healthy and pain free, he's honest about what he finds, he's conservative when it comes to my treatment!...he has never opted to dispensing pain medication as a treatment for me. The high degree to which he has cared for me as a patient and as a person is again why I'll stress, I'd rather take the pain and discomfort and wait to see Dr. Brzezinski but I will not agree to see any other gastro specialist. I have no reservations about recommending Dr. Brzezinski to anyone and closer to home, my siblings now know CCF and Dr. Brzezinski is who they will come to if they develop gastro issues. There is nothing in it for me to not be shy about saying Dr. Brzezinski is the best and is the only doctor I trust when it comes to my gastro health...I'm not getting special treatment or better treatment or being placed at the front of an appointment line. From my experience, Dr. Brzezinski is to gastroenterology what the late Dr. DeBakey was to the heart.

Reviewed on Nov 26, 2019

Absolutely without question or reservations that I will recommend Dr. Brzezinski, this gastro practice and CCF to others!

Reviewed on Nov 26, 2019

I love Dr B. He is the first doctor to listen and help me. He is caring and shows his concern for my wellbeing. He even reached out to me while I was dealing breast cancer last year. He is truly an amazing doctor.

Reviewed on Nov 25, 2019

Dr. Brezinski is a kind, caring physician who responded to the issue I am having with concern. We discussed treatment options and he told me how to reach him for future needs.

Reviewed on Nov 25, 2019

Dr. B is a caring physician who I would highly recommend.

Reviewed on Nov 20, 2019

It?s great when I can leave an appointment with Dr. B. laughing. He takes his time, answers all questions, and his sense of humor is great!

Reviewed on Nov 20, 2019

Dr Brzezinski is by far the best Doctor I have ever had. Dealing with severe Crohn's (30 years) and numerous rejections, there is no doubt I wouldn't have the quality of life I have had without the care and expertise of Dr B. Probably wouldn't be alive. I am so thankful for Dr Brzezinski. Mayo Clinic told me I was so fortunate to have him as my provider. Not only is he so smart but is also one of the kindest people I know.

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