Department Gastroenterology & Hepatology
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 School - 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 11/29/2017, 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

161 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
Listens 4.9
Courtesy, Respect & Concern 5
Knows Medical History 4.8
Time Spent with Patient 4.9
Patient Rating of Doctor 4.9

29 Patient Comments

Reviewed on Oct 15, 2018

I feel like the doctor is over scheduled. I had an appointment early in the morning and saw the doctor over an hour after scheduled appointment time. He is very thorough with his patients so more time should be scheduled between patients.

Reviewed on Sep 28, 2018

I appreciate the time Dr Brzezenski spends with me. I don't mind waiting when I have to because I know how well he takes care of his patients.

Reviewed on Sep 14, 2018

Dr Brzezinski seems overloaded and did not remember the specifics of my medical history, current situation, or why I had scheduled the appointment. after awhile, we had mostly cleared it up, but I have been seeing him for years, and saw him in December last, so it was surprising as he has always been on the ball. once we caught up, everything was normal.

Reviewed on Sep 14, 2018

My husband and I were so impressed by Dr. Brzezinski. He spent almost 2 hours with us going over all of my questions,concerns,and records. He truly cares for his patients and not only has an outstanding knowledge base he is caring and kind. I consider it a blessing to have seen Dr. Brzezinski.

Reviewed on Sep 10, 2018

Dr. Brzezinski is the best physician I have ever had. He takes the time to listen and to explain. He is kind and very knowledgeable about his specialty of gastroenterology. I trust him, I like him, he is fantastic.

Reviewed on Aug 24, 2018

While this has been my provider of choice for a number of years it is very difficult to get in to see him for follow up appointments even based on when he wants to see me back.

Reviewed on Aug 20, 2018

I do not mind waiting a little longer because I know the doctor will give the time needed to listen to me, be thorough, consider all options.

Reviewed on Aug 3, 2018

i expressed concern with the side effects of one of the medications and Dr. Brzezinski thought carefully about my options and prescribed me a different medication that has been working great without the side effects. I am very thankful!

Reviewed on Aug 2, 2018

I always feel better after I talk to Dr. Bryzynski, he is a wonderful compassionate, knowledgable Doctor. He really cares about his patients and their health concerns. Best doctor at the Cleveland Clinic.

Reviewed on Jul 26, 2018

Dr. B is on time or notifies me of delays and the cause. Very respective of my time. Never a problem.

Reviewed on Jul 23, 2018

dr. Bryzynski and the nurse were excellent. they both spent lots of time with me. doctor provided education for me while going through my health issues

Reviewed on Jun 20, 2018

Dr. Brzezinski is outstanding. i have exceedingly great confidence in the care that he has provided the last 18 years. A Rating of Excellent for both him and his team.

Reviewed on Jun 19, 2018

Dr. Brzenzski ALWAYS that's as much time with his patients as the patient requires and ALWAYS thoroughly explains all options and alternatives related to the condition being treated. I was lucky to find him as a gastroenterologist roughly 30 years ago and don't look forward to the day that relationship may end.

Reviewed on May 24, 2018

Dr. B was great! Would highly recommend him. My only issue was waiting the three hours from my appointment time until I saw him.

Reviewed on May 22, 2018

Dr. B has been my Dr for many many years, he is absolutely the greatest to me and my family. Only issue I have is I know I usually have to plan an extra few hours for any appt's. Dr B is totally worth the wait.

Reviewed on May 4, 2018

While things ran a little behind, it was obvious that this was only the case because Dr. Brzezinski takes ample time to connect with each patient, explain things thoroughly, and answer any questions. I'd rather wait a few minutes for the care I received than be seen right on time but be rushed through an appointment.

Reviewed on Apr 26, 2018

this was for a second opinion and change of Doctor. Dr. Brezinski was patient, kind, listened, and explained things in a way I had not experienced before. he spent the time with me and answered all my questions. wonderful experience, wonderful Doctor -- he is now my new doctor!

Reviewed on Apr 20, 2018

I have been seeing Dr. Brzenezinski for many years for Crohns disease and, in my opinion, he is the "best of the best" for any type of gastrointestinal problem.

Reviewed on Apr 20, 2018

As I previously stated, Dr. Aaron Brzezinski is an EXCELLENT doctor and caregiver. He sincerely cares about all his patients.

Reviewed on Apr 17, 2018

Dr.Bzrezinski does an outstanding job in all phases of my care!!

Reviewed on Apr 12, 2018

Dr Bryzinski is worth waiting for, no matter how long. He is the very best Doctor there is. I feel so fortunate to call him My Doctor!

Reviewed on Feb 15, 2018

Dr. B is one of the best doctors I have ever seen. He takes time and is showed true concern and listened to what I had to say.

Reviewed on Jan 15, 2018

I had several questions I wanted to raise with Dr. Breziznski and could not because he spent so long scrolling through my records. This was frustrating because he did not tell me what he was even looking at and I felt he spent time on irrelevant issues which prevented me from addressing my actual concerns.

Reviewed on Jan 2, 2018

Dr. B was top notch, very kind and compassionate and I would highly recommend him to anyone.

Reviewed on Dec 14, 2017

*Dr. Brzezinski is the greatest - No one could replace him.

Reviewed on Dec 13, 2017

Cannot say enough positive things about Dr. Brzezinski. He is a 10/10. He is intelligent, kind, thoughtful, and empathetic. I feel so fortunate that I and able to be cared for by him.

Reviewed on Dec 8, 2017

Doctor Brzezinski took the time andwe went over some changes that I can try. He really spent time with me. I have seen him for about 15 years Nd dread the day he retires.

Reviewed on Dec 7, 2017

Dr. Brzezinski always listens carefully to my concerns and addresses them all.

Reviewed on Nov 27, 2017

The doctor was very thorough and answered all of my questions

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