Dr. Hamer is a member of the electrophysiology section. Dr. Hamer is an expert in complete management of pacemakers, defibrillators and resynchronization devices. He specializes in treatment of patients with arrhythmias. He is board certified by the American Board of Internal Medicine in Interna...

Certified Specialties

Cardiovascular Disease - American Board of Internal Medicine

Clinical Cardiac Electrophysiology - American Board of Internal Medicine

Internal Medicine - American Board of Internal Medicine

Faculty Appointments

Associate Professor of Clinical Medicine - Department of Medicine, Cardiology (SMD)

Credentials

Residency & Fellowship

Fellowship, Cardiovascular Disease, Duke University Hospital. 1993 - 1994

Fellowship, Cardiovascular Disease, Duke University Hospital. 1990 - 1993

Residency, Internal Medicine, University of Rochester Medical Center. 1987 - 1990

Internship, Internal Medicine, University of Rochester Medical Center. 1986 - 1987

Education

MD | Northwestern University. 1986

Ratings & Comments

At URMC, we believe that patients should be empowered to make the right decisions regarding their personal healthcare. To do so, transparency is critical. URMC partners with Press Ganey, to survey our patients about all aspects of their care experience. We are now putting this pertinent information at your fingertips by displaying star ratings for our providers along with anonymous patient comments on our website. This will help you make better-informed choices about how and with whom you seek care. Click here to learn more about the surveys used to generate this vital information. Learn more about our survey process.

Ratings

Care provider's discussion of any proposed treatment (options, risks, benefits, etc.)

4.9

Likelihood of recommending this care provider to others

4.9

Explanations the care provider gave you about your problem or condition

4.9

Care provider's efforts to include you in decisions about your care

4.9

Concern the care provider showed for your questions or worries

4.9

Patient Comments

5.0

Dr Hamer is a very nice person. He comforted me during my visit as my husband had passed.

Dec 06, 2024

5.0

Dr Hamer has always been a great listener. He has always taken the time to answer my questions thoroughly.

Dec 02, 2024

5.0

Dr. Hamer is a wonderful and empathetic doctor who listens and shows he truly cares.

Nov 29, 2024

5.0

Dr. Hamer is the best! Shows care, concern and is so knowledgeable! He answers all my questions and I never feel rushed!

Oct 19, 2024

5.0

Dr. Hamer is a fantastic doctor and person in general. He is amicable, knowledgeable, patient and spend as much time as needed and more. He is the best!

Oct 07, 2024

5.0

Dr Hamer was excellent.

Sep 01, 2024

5.0

Dr. Hamer is very personable, listened well to my concerns, thoroughly reviewed medical information, and clearly explained his recommendations.

Aug 17, 2024

5.0

I was very impressed with the thoughtfulness and expertise of Dr. Hamer.

Aug 11, 2024

5.0

All good

Aug 11, 2024

5.0

Dr Hamer is always attentive, concerned & on top of the best treatment for my condition.

Aug 04, 2024

5.0

Dr Hamer is the best doctor in Rochester!

Aug 04, 2024

5.0

Dr. Hamer is a wonderful doctor with a compassionate bedside manner.

Jul 27, 2024

5.0

Doctor did not rush through my visit, was very thorough

Jul 11, 2024

5.0

Everyone at this office is very personable as well as professional. The office is run with great efficiency. Waiting time is always very minimal.

Jun 26, 2024

5.0

Dr Hamer is knowledgeable, kind, compassionate, and patient.

Jun 21, 2024

5.0

Dr. Hamer has a very compassionate personality! It's so refreshing to see in this day and age!

Jun 15, 2024

5.0

I have and will continue to recommend Dr Hamer to friends

Jun 06, 2024

4.6

Thankful to have access to medical team here in Hornell.

May 30, 2024

4.6

Keep up the good work.Thank you.

May 30, 2024

5.0

Dr. Hamer is always concerned about my health & listens to what I say. He cares. I trust him completely & know I am fortunate to have him as my cardiologist,

May 05, 2024

5.0

Any time one of my family, friends or acquaintances ask I can refer them to a cardiologist for their heart care, I immediate tell them that I am blessed to have Dr. Mark Hamer and give them his phone number.

May 03, 2024

5.0

Dr. Mark Hamer is the best. Thoughtful, engaging, very personable. Knows his "stuff."

May 01, 2024

5.0

It was a great visit.

Apr 30, 2024

5.0

DR. HAMER very compassionate & respectful.

Apr 30, 2024

5.0

Dr Hamer is a very kind individual who actually listens to his patients.

Apr 27, 2024

5.0

Very good.

Apr 23, 2024

5.0

Dr Hamer is very thorough

Apr 14, 2024

4.8

Provider was friendly and listened. He showed concern.

Mar 24, 2024

5.0

Dr. Hamer saved my life in emergency 2018. He gave me a pacemaker.

Mar 24, 2024

5.0

Dr Hamer is very calm Informative Caring. I would recommend him to everyone.

Mar 22, 2024

5.0

Dr Hamer is wonderful. Appreciate that he listened and took time to answer my questions

Mar 08, 2024

5.0

Dr. Hamer has always been kind, attentive, thoughtful and informative. He listens and offers insights and advice that are helpful in making decisions. I feel he cares about me as a whole person and that is important, in my opinion.

Feb 09, 2024

5.0

Dr Hamer always listens to my concerns & questions. He always takes the time to explain treatment & any side effects or concerns regarding a procedure, drug or treatment. I always know he has my health at the forefront of any discussion. He never waivers.

Jan 23, 2024

5.0

Good.

Jan 02, 2024

5.0

Very good.

Oct 18, 2023

5.0

Excellent visit - answered all my questions

Sep 24, 2023

5.0

Dr Hamer is the type of doctor we all hope to have and that physicians should strive to be. I never feel rushed and I really feel that he is invested in his patients and he takes the time to get to know you and answer/explain at an appropriate level. He's the best !

Aug 25, 2023

5.0

Dr. Hamer is excellent.

Aug 19, 2023

5.0

Dr. Hamer is an angel!

Jul 15, 2023

5.0

Dr. Hamer, nurses and receptionists are all EXCELLENT. I would highly recommend them.

Jul 11, 2023

5.0

Dr. Hamer is very well for has being a great dr.

Jun 22, 2023

5.0

Dr. Hamer is great. His assistant nurse is very good as well.

Jun 07, 2023

5.0

Dr. Hamer - excellent interaction every time.

May 26, 2023

5.0

Dr Hamer is a phenomenal Cardiologist. He is very empathetic & concerned about my health & lifestyle. He is always on top of the medical interventions for AFIB which is my latest concern. I am very grateful he is my Cardiologist.

Apr 27, 2023

5.0

When I did contact Dr. Hamer via portal. I received a personal call back.

Mar 03, 2023

5.0

Dr. Mark Hamer - great doc -

Feb 22, 2023

5.0

[...] great MD office runs well.

Feb 22, 2023

5.0

Have always received excellent care, great explanations to any questions I may have. Very easy to discuss issues with. Always takes his time to ensure I am understanding what he is telling me.

Jan 19, 2023

5.0

Dr. Hamer is great.

Dec 22, 2022

5.0

Dr. Mark Hamer is the BEST CHOICE anyone could decide on! In my book #1.

Dec 22, 2022

5.0

Dr Hamer has always been an informed, caring, & interested Physician. He has always taken the time to explain every aspect of my medical condition, follow up care & options.

Dec 16, 2022

5.0

It has been a long time since I went to the doctor and he/she actually read my chart prior to our visit! Well prepared!

Nov 21, 2022

4.6

Dr. Hamer is an amazing and thoughtful provider!

Nov 17, 2022

5.0

I would certainly recommend Dr. Hamer, but it is unlikely that I will have such an opportunity.

Oct 26, 2022

5.0

Dr Hamer is the best - attentive, empathetic, knowledgeable, up to date & an extremely dedicated physician. I feel fortunate that he is my Cardiologist.

Oct 22, 2022

5.0

I have a CRT/CD implant and Dr. Hamer is an electrophysiologist, but he works closely with my cardiologist and checks with him regularly to be sure they are on the same page.

Oct 19, 2022

4.6

Very satisfied.

Aug 23, 2022

5.0

Dr. Hamer is excellent,very caring, listens to my concerns.

Jul 21, 2022

3.8

I had typed a list of my concerns to save him time - He only discussed 2 out of 10.

Jun 16, 2022

5.0

Dr Hamer is always concerned, informative & excellent in listening & explaining the best options for my AFIB.

Jun 11, 2022

5.0

Dr Hamer is very informative and listens very well

May 20, 2022

5.0

Dr. Hamer was kind, caring & made sure I understood my options and others - related health issues that needed to be considered.

Apr 19, 2022

5.0

Dr. Hamer is very professional & personal dr., really like his humility.

Apr 07, 2022

5.0

Just a checkup, no worries or concerns.

Feb 15, 2022

5.0

Very satisfied!!!!

Feb 09, 2022