Sameer M Mazhar

Sameer M Mazhar, M.D.

1221 North Highland Avenue

Aurora, Illinois 60506

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Sameer M Mazhar, M.D.


1221 North Highland Avenue

Aurora, Illinois 60506



Open today 6:00 am

8:30 pm

Open today 6:00 am

8:30 pm

Open today 6:00 am

8:30 pm

Open today 6:00 am

8:30 pm

Open today 6:00 am

8:30 pm

Open today 8:00 am

12:00 pm

Open today


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I strive to maintain an atmosphere built on open communication and education that instills confidence, comfort, and clarity. In doing so, I advocate for and develop partnerships with my patients, delivering evidence-based care specific to each patient's circumstances.

About Me



  • Undergraduate Degree: Northwestern University
  • Fellowship: Massachusetts General Hospital
  • Fellowship: University Of California
  • Residency: Northwestern University
  • Internship: Northwestern University McGraw Medical Center
  • Medical School: Feinberg School of Medicine, Northwestern Memorial Hospital

Hospital Affiliations

  • Advocate Christ Medical Center
  • Advocate Dreyer

Ratings and Comments

Sameer M Mazhar, M.D.

4.9 out of 5

281 Patient Ratings

Shows respect for what you say

5 out of 5

280 Patient Ratings

Spends enough time with you

5 out of 5

279 Patient Ratings

Gives easy to understand instructions

4.9 out of 5

247 Patient Ratings

Explains in a way you understand

4.9 out of 5

281 Patient Ratings

Listens carefully to you

5 out of 5

279 Patient Ratings

Knows your important medical history

4.9 out of 5

281 Patient Ratings


I was happy with this visit and the procedure.

Reviewed on September 21, 2019 7:00 PM

It was a friendly informative meeting about my upcoming colonoscopy.

Reviewed on September 15, 2019 7:00 PM

excellent physician

Reviewed on September 15, 2019 7:00 PM

Dr. Mazhar is very professional and explains himself very well. I only see him once a year and he orders tests for me every 3-5 years. This visit was good just as I expected.

Reviewed on September 15, 2019 7:00 PM

Dr Mazhar is prepared for my visit demonstrated by comments and questions. He makes me feel a part of my health care decisions, he does not talk down to me and clearly explains his decision process.

Reviewed on September 10, 2019 7:00 PM

Very professional.

Reviewed on August 29, 2019 7:00 PM

Wonderful doctor. Always took time to explain everything to me.

Reviewed on August 11, 2019 7:00 PM

Dr. Mazhar is a good dr., takes time to help you understand the best treatment needed, very nice and professional.

Reviewed on July 29, 2019 7:00 PM

Very satisfactory. Dr Mazhar always listens carefully and asks questions regarding my health. He is always aware of my past healthhistory and treats me accordingly.He is very kind and thoughtful.I leave the office reassured that I'm in good hands.

Reviewed on July 28, 2019 7:00 PM


Reviewed on July 28, 2019 7:00 PM

Excellent visit and service provided. The dr. and his staff were very attentive to my needs and made sure I was comfortable during the procedure. Great positive energy projected by the entire staff.

Reviewed on July 15, 2019 7:00 PM

Very good this was for a colostomy.

Reviewed on July 7, 2019 7:00 PM

This provider has always been kind, knowledgeable & professional.

Reviewed on June 18, 2019 7:00 PM

Always a pleasant appointment with Dr. Mazhar, he is a great physician.

Reviewed on June 16, 2019 7:00 PM

very informative, thorough, polite, knowledgeable, sincere, caring, loved having him as my care provider

Reviewed on June 14, 2019 7:00 PM

I'm pleased that Dr. Mazhar scheduled my procedures after one consult considering my & my family's history. So many doctors schedule multiple consultations before doing the only procedures that will provide answers & treatment. I was a former patient of his.

Reviewed on June 12, 2019 7:00 PM

Dr Mazhar always presented himself as very thorough and knowledgeable. he seems to genuinely seem concerned with recommending what's best for me.

Reviewed on May 23, 2019 7:00 PM

Dr. Mazhar is an excellent health care professional.

Reviewed on May 22, 2019 7:00 PM

Good experience.

Reviewed on May 15, 2019 7:00 PM

excellent doctor and staff

Reviewed on April 29, 2019 7:00 PM

he was very great at everything when talking to me and he's an awesome doctor with caring and taking time with going over about what he wants to help figure out what to do help with my health I'm glad to have him as my doctor

Reviewed on April 28, 2019 7:00 PM

Dr. Mazhar is great, excellent care, very thorough and caring. Highly recommend him for gastro needs.

Reviewed on April 22, 2019 7:00 PM

He always answers any questions i have.

Reviewed on April 21, 2019 7:00 PM

Dr. Mazhar is such a good listener, I never feel rushed when I see him, I'm so glad I chose him when Dr. X retired.

Reviewed on March 30, 2019 7:00 PM

Dr. Mazhar is an excellent doctor and always takes the time to make sure I completely understand the status of my condition.

Reviewed on March 17, 2019 7:00 PM


Reviewed on March 1, 2019 6:00 PM

It was very good.

Reviewed on February 22, 2019 6:00 PM


Reviewed on February 17, 2019 6:00 PM

overall good

Reviewed on February 1, 2019 6:00 PM

Dr. Mazhar is always professional, patient and informative. I have no issue with this provider. however, my most recent clinic visits and phone calls to any provider since you became part of "Advocate" have been negative. Staff are far less personable, treated my like a number, sometimes curt, rude and condescending. Too bad you have lost your personal touch since the full merger with Advocate. As a healthcare professional myself with a high commitment to patient safety, quality care and satisfaction, very disappointing to see where healthcare has gone.....especially with your clinics.

Reviewed on February 1, 2019 6:00 PM

I had an excellent experience

Reviewed on January 30, 2019 6:00 PM

First visit - thought it went well.

Reviewed on January 29, 2019 6:00 PM

I went to him because he was highly recommended

Reviewed on January 29, 2019 6:00 PM

I had a colonoscopy. the doctor spoke with me both before and after the procedure to explain things. he used language that was easy to understand and took his time explaining things and fielding my questions.

Reviewed on January 29, 2019 6:00 PM

My visit to Dr. Mazhar's office was for the purpose of validating that it was appropriate to have an exploratory/preventative colonscopy which I am on a schedule of having every five years. I think Dr. Mazhar is a very good gastroenterologist and has a very positive, strong bedside manner or way in which he interacts with me and his other patients. His nurse who saw me first was also very pleasant and engaging. I've had nothing but positive experiences with Dr. Mazhar (true for my wife also). He is a wonderful specialist I see and I feel very comfortable in his care.

Reviewed on January 26, 2019 6:00 PM

I was extremely impressed when Dr. Mazhar came in that he already knew my medical history relating to my problem. Also, I was impressed that he was honest and up-front about not knowing exactly what was causing my problem but was willing to try something and asked me to come for a follow-up in two months. I would definitely recommend him to anyone.

Reviewed on January 25, 2019 6:00 PM

Well-informed on my history, and took it all into account.

Reviewed on January 25, 2019 6:00 PM

Excellent provider

Reviewed on January 24, 2019 6:00 PM

very comfortable with his explanation of Ct scan results.

Reviewed on January 24, 2019 6:00 PM

Dr Mahzar explains things well.

Reviewed on January 20, 2019 6:00 PM

The provider spent tons of time with me and really listened. I am very happy with his care.

Reviewed on January 18, 2019 6:00 PM

he is so nice, and very thorough...

Reviewed on January 13, 2019 6:00 PM

He was very kind to me .

Reviewed on January 13, 2019 6:00 PM

Dr. Sameer was very thorough. I am glad I chose him to do my colonoscopy. Thank you.

Reviewed on November 27, 2018 6:00 PM

Dr. Mazhar and all of the members of they Dryer surgery staff did an excellent job. They explained the procedure and were supportive and professional throughout the endoscopy.

Reviewed on November 15, 2018 6:00 PM

I had an excellent experience with my Provider and his staff. All of my questions were answered and what is needed to address my health condition.

Reviewed on November 6, 2018 6:00 PM

I was very impressed by Dr Mazhar. This was the first time seeing him as Dr Z_____ had been the doctor I had seen. I like this doctor!

Reviewed on November 4, 2018 6:00 PM

DR Mazhar is always prepared for my visit, discusses recent tests, listens to & asks about my health in general & explains all the labs or test results so I can understand them. I leave with a comfortable feeling that he really cares about me & my health, not just the things that the current office visit it for. A GREAT DOCTOR!!!

Reviewed on October 22, 2018 7:00 PM

Very pleased with Dr. Mazhar and his team.

Reviewed on October 20, 2018 7:00 PM

Dr. Mazhar is WONDERFUL - "sharp as a tack" - shares his knowledge with me - I am BLESSED too have Dr. Mazhar provide for me. X 09-22-2018.

Reviewed on September 30, 2018 7:00 PM


Reviewed on September 21, 2018 7:00 PM

Dr. Mazhar is hard to get answers from when you MyChart him, but when you're in the office for an appointment, he's great. He listens, answers all questions and give both the good and the bad.

Reviewed on September 20, 2018 7:00 PM

I felt encouraged.

Reviewed on September 18, 2018 7:00 PM

All services were outstanding and Dr. Mazhar is exceptional. Thank you all.

Reviewed on September 15, 2018 7:00 PM

Dr. Mazhar is one of your best doctor you have at your location.

Reviewed on September 10, 2018 7:00 PM

he is always very professional and you know he has reviewed your records before meeting with you, which I like.

Reviewed on September 1, 2018 7:00 PM

Dr. Mazar is very easy to talk to and went over the pictures from the last procedure and explained very thoroughly why I should have another one.

Reviewed on August 20, 2018 7:00 PM

Your my chart e-mail response time is horrible. NEED TO CHANGE.

Reviewed on August 13, 2018 7:00 PM

Was treated very well with this doctor and the people working for him or the clinic.

Reviewed on July 30, 2018 7:00 PM

Everyone was very kind and generous my app was fast in and out, no complaints what so ever.

Reviewed on July 28, 2018 7:00 PM

I felt the time spent with the doctor was well spent.

Reviewed on July 24, 2018 7:00 PM


Reviewed on July 19, 2018 7:00 PM

Dr. Mazhar is a good listener, takes his time, and shows interest in me.

Reviewed on July 19, 2018 7:00 PM

When calling the office an asking for appt. the people making appt. are very rude. My Doctor X retired. So I was unaware of this and the girl on the phone seemed just angry. That need to be work on.

Reviewed on June 27, 2018 7:00 PM

dr Mazar is the best seeing him is a comfort to me and I trust him with my life he is kind, patient, a great communicator, and has made my medical complete cations easy to manage.

Reviewed on June 11, 2018 7:00 PM

He is a good communicator!

Reviewed on May 29, 2018 7:00 PM

I trust my doctor with my life because, he helped me save mine.

Reviewed on May 27, 2018 7:00 PM

Professional, comprehensive, intelligent and thoughtful.

Reviewed on May 21, 2018 7:00 PM

I thought the doctor was very thorough and reassuring. he put me at ease and answered all my questions.

Reviewed on May 19, 2018 7:00 PM

My doctor retired and my husband was seeing Dr. Mazhar so he recommended him to me. I have been pleased with his care. He knew my past history and will continue my current care and schedule for tests.

Reviewed on May 15, 2018 7:00 PM

Very good provider who is both competent and caring.

Reviewed on May 14, 2018 7:00 PM

Very good.

Reviewed on May 7, 2018 7:00 PM

This comment is about calling Advocate Dryer Highland in general. It takes a very long time to even get to the person that transfers the call to the correct department; for example.

Reviewed on April 27, 2018 7:00 PM

I saw Dr. Mazhar a year ago, this visit was a follow up for a liver biopsy I had done July 6th - yes July 6th - and this visit was March 29th!!! Every test I have had done for Dr. Mazhar I have had to call to see what the follow up as - including the biopsy that took over a month to get the results for! I'm sure Dr. Mazhar is a fine dr., but whoever is in charge of getting patient results & what the follow up instructions are is awful. Thank God nothing was seriously wrong with me!

Reviewed on April 24, 2018 7:00 PM

Dr. Mazhar was thorough, professional & knowledgeable.

Reviewed on April 19, 2018 7:00 PM

Very polite dr. seemed like he cared about my well being - very comfortable with him.

Reviewed on April 18, 2018 7:00 PM

Took time to answer all my questions.

Reviewed on April 6, 2018 7:00 PM

excellent provider thoroughly reviewed everything with me in great detail made me feel very comfortable with his opinion on everything

Reviewed on March 31, 2018 7:00 PM

I was pleased to meet Dr. Sameer Mazhar, he was attentive, listened to my concerns and offered solutions. I looked forward to continuing my care with Dr. Mazhar.

Reviewed on March 28, 2018 7:00 PM

The Provider did a good job.

Reviewed on February 3, 2018 6:00 PM

A very warm and welcoming medical staff. My experience was professional and they put me at ease. I give them a A plus!

Reviewed on January 22, 2018 6:00 PM

As usual, my appointment with Dr. Mahzur was excellent! He is extremely thorough and always well prepared before he comes in. I trust his advise and insights.

Reviewed on January 3, 2018 6:00 PM

Dr. Mazhar is always very informative. He doesn't rush & waits for me to ask questions or express concerns. He's a pleasant doctor who makes me feel confident of his care, procedures & med choices.

Reviewed on December 28, 2017 6:00 PM

very clear easy to understand and kind

Reviewed on December 23, 2017 6:00 PM

Dr. Mazhar was super nice & respectful. He is attentive and a good listener. He made me feel comfortable.

Reviewed on December 2, 2017 6:00 PM

As always, Dr. Mazhar was thorough; respectful. He is one of the best providers I have encountered.

Reviewed on December 1, 2017 6:00 PM

Courteous, attentive, and listens to my concerns.

Reviewed on November 20, 2017 6:00 PM

I found the dr. to be friendly, engaging; receptive to my questions and concerns.

Reviewed on October 22, 2017 7:00 PM

He made me feel very comfortable. Answered my questions & concerns.

Reviewed on October 17, 2017 7:00 PM

This provider spent time discussing not only what the visit was for but my health in general giving me the feeling that he really cared about any other health issues I have.

Reviewed on October 16, 2017 7:00 PM

Was a referral visit to a specialist made by my PCP. Dr Mazahr was very kind and patient.

Reviewed on October 5, 2017 7:00 PM

he was a fantastic doctor and I felt completely comfortable with the doctor.

Reviewed on September 30, 2017 7:00 PM

Dr. Mazhar is very good.

Reviewed on September 21, 2017 7:00 PM


Reviewed on September 13, 2017 7:00 PM

Mazhar Sameer M MD is excellent person and professional dr.

Reviewed on September 10, 2017 7:00 PM

Very satisfied. Excellent care.

Reviewed on September 4, 2017 7:00 PM

i jad a hard time finding the office. i tried to call and say i would be late but with all the advocate name cjanges i didnt know the correct numbers. i was late gor appt. Dr saw me anyway so i wouldnt have to take more time off work. i didnt feel uncomfortable or rushed. i was impressed w his bed side manner.. very thorough. great dr.

Reviewed on August 21, 2017 7:00 PM

I was very impressed with this provider and would recommend him to anyone.

Reviewed on August 19, 2017 7:00 PM

He's Brilliant, Very good at listening to all my questions. He's a treasure trove of knowlegde for my completx health conditions. He very responsive to mychart questions. He gave me hope.

Reviewed on July 30, 2017 7:00 PM


Reviewed on July 1, 2017 7:00 PM

health eNews with Sameer M Mazhar, M.D.

Medical Areas of Expertise

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Clinical Interests

  • Autoimmune Liver Conditions
  • Colorectal Cancer Prevention
  • Colo-Rectal Screening
  • Irritable Bowel Syndrome
  • Peptic Ulcers
  • Viral Hepatitis


  • AAH Preferred – Team Member Plan
  • AAH Select – Team Member Plan
  • Aetna Basic
  • Aetna Classic
  • Aetna HMO
  • Aetna Managed Choice (MC) POS
  • Aetna NAP - PPO
  • Aetna Open Access POS
  • Aetna Open Choice POS
  • Aetna Open Choice PPO
  • Aetna Select Choice EPO
  • Aetna Signature Administrators PPO
  • Aetna US Healthcare Medicare Advantage HMO
  • Beech Street / PPO Next Wrap Plus
  • Beech Street Network PPO
  • Blue Advantage HMO
  • Blue Choice PPO
  • Blue Cross HMO Illinois
  • Blue Cross Medicare Advantage HMO
  • Blue Cross Medicare Advantage HMO - POS
  • Blue Cross PPO
  • Blue Cross PPO - Advocate Associate Medical Plan
  • Blue Precision Bronze HMO
  • Blue Precision Gold HMO
  • Blue Precision HMO
  • Blue Precision Platinum HMO
  • Blue Precision Silver HMO
  • BlueCare Direct
  • Cigna - Great West Health EPO
  • Cigna - Great West Plus
  • Cigna Open Access Plus POS
  • CIGNA Open Access POS
  • Cigna POS
  • Cofinity PPO
  • Coventry / Personal Care POS
  • Coventry Advantra Medicare HMO
  • Coventry HMO
  • Coventry One Select PPO
  • Coventry PPO
  • First Health (Coventry) Rental PPO
  • First Health Network EPO
  • First Health Network PPO
  • Great West Healthcare - Cigna HMO
  • Great West Healthcare - Cigna Open Access Plus HMO
  • Health Alliance ICP
  • Health Alliance MMAI
  • Healthlink PPO
  • HFN Platinum EPO
  • Humana Choice Care Network PPO
  • Humana Gold Plus HMO
  • Humana HMO Select
  • Humana Illinois Platinum HMO
  • Humana Integrated Care Program of Illinois
  • Humana Medicare Choice PFFS
  • Humana Medicare Choice PPO
  • Humana National HMO
  • Humana National POS - Open Access
  • Humana National PPO
  • Meritain Health PPO
  • MultiPlan PPO
  • PHCS Savility PPO
  • Three Rivers Provider Network PPO
  • UFCW Local 1546 Health and Welfare Fund (UMC)
  • United Healthcare AARP
  • United Healthcare Basics PPO
  • United Healthcare Caterpillar
  • United Healthcare Charter
  • United Healthcare Choice HMO
  • United Healthcare Choice Plus POS
  • United Healthcare Core PPO
  • United Healthcare EPO
  • United Healthcare HMO
  • United Healthcare Indemnity
  • United Healthcare Navigate HMO
  • United Healthcare Navigate POS
  • United Healthcare Nexus
  • United Healthcare POS
  • United Healthcare PPO
  • United Healthcare Select EPO
  • United Healthcare Select HMO
  • United Healthcare Select Plus POS


Learn more about this provider and request an appointment online. Prior to requesting an appointment with any provider you select, confirm with your insurance carrier that this doctor is in your insurance network.

Information listed under the "clinical interests" columns was supplied by the physicians. It is provided to you for informational purposes only, and neither Advocate Health Care nor the Advocate facility has independently verified the information. If you wish to confirm the information contained herein, or if you have any other questions about a particular physician, please contact the physician’s office.

Unless otherwise stated, physicians are independent practitioners who are not employees or agents of Advocate Health Care or the Advocate facility where the care is being provided. Neither Advocate Health Care nor the Advocate facility shall be liable for the medical care provided or decisions made by these independent physicians.

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