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Department Cardiovascular Medicine
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages Arabic, English
Surgeon No
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus

Specialties & Treatments

Treatment & Services

  • Cardiology
  • Cardiovascular Medicine
  • Cardiovascular Medicine Department
  • Clinical Cardiology Section
  • General Cardiology
View all 5 Treatment & Services +

Specialty in Diseases & Conditions

  • Aorta Disease
  • Aortic Aneurysms
  • Aortic Regurgitation
  • Aortic Stenosis
  • Aortic Valve Regurgitation
  • Arterial Diseases - "Blocked Arteries"
  • Asymptomatic Valve Dysfunction
  • Atherosclerosis (Vascular)
  • Atrial Fibrillation
  • Cardiomyopathy
  • Cardiovascular Disease
  • Cardiovascular Risk Prevention
  • Carotid Artery Disease
  • Coronary Artery Disease
  • Heart Attack
  • Heart Disease
  • Heart Failure
  • Heart Murmur
  • Heart Palpitations
  • Heart Related Illnesses
  • Heart Valve Disease
  • High Cholesterol
  • Hypertension - High Blood Pressure
  • Hypertrophic Cardiomyopathy
  • Ischemic Cardiomyopathy
  • Metabolic Syndrome
  • Mitral Valve Prolapse
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Myocardial Ischemia
  • Pericardial Effusion
  • Pericarditis
  • Premature Ventricular Complexes
  • Shortness of Breath
  • Tricuspid Regurgitation
View all 35 Specialties +


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About John Mansour, MD

John S. Mansour, MD, MBA, is a cardiologist in the Section of Clinical Cardiology in the Robert and Suzanne Tomsich Department of Cardiovascular Medicine, Sydell and Arnold Miller Family Heart, Vascular & Thoracic Institute. He sees patients at Cleveland Clinic main campus.

In addition to office visits, Dr. Mansour also offers scheduled follow up virtual visits to select patients, through the Cleveland Clinic Express Care ® Online app. This platform allows patients to see their physician live, using their smartphone, tablet or computer.

Specialty Interests: General cardiology, coronary artery disease, dyslipidemia (lipid disorders), structural heart disease, cardiovascular disease, hypertension (high blood pressure)

Number of Patients Treated: Physicians in the Sydell and Arnold Miller Family Heart, Vascular & Thoracic Institute annually perform approximately 10,000 cardiac catheterizations, a minimally invasive procedure for diagnosing and treating heart disease.  Dr. Mansour has performed more than 1,000 cardiac catheterizations in the past three years.

Success Rates: To learn about patient outcomes for coronary catheterization at Cleveland Clinic compared with outcomes reported at other hospitals, go to Cleveland Clinic has been rated the top heart center in the United States by U.S. News & World Report for more than 20 consecutive years, drawing patients from across the country and around the world.

Education and Training: After earning a bachelor’s degree in management cum laude from Case Western Reserve University, Cleveland, Ohio, Dr. Mansour went on to earn a Master’s of Business Administration from the Weatherhead School of Management at Case Western Reserve University in 2002 and his medical degree from Case Western Reserve University School of Medicine in 2006. He completed his internal medicine residency and fellowships in cardiovascular medicine and interventional cardiology at University Hospitals Case Medical Center, Cleveland, Ohio. Dr. Mansour was named to the Cleveland Clinic staff in 2016.

About Dr. Mansour: I love practicing cardiology because I feel like it is the most rewarding field in medicine.  We have many treatment options that can help our patients that have a dramatic impact on patients’ lives, both in the acute setting and over the long term.

Leisure Activities: Dr. Mansour enjoys golf, spending time with his wife and daughter and is an avid Cleveland sports fan

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - University Hospitals of Cleveland
Interventional Cardiology
Cleveland, OH USA

Fellowship - University Hospitals of Cleveland
Cardiovascular Disease
Cleveland, OH USA

Residency - University Hospitals of Cleveland
Internal Medicine
Cleveland, OH USA

Medical Education - Case Western Reserve University School of Medicine
Cleveland, OH USA

Graduate School - Case Western Reserve University Weatherhead School of Management
Cleveland, OH USA

Undergraduate - Case Western Reserve University
Cleveland, OH USA

Additional Training

  • Interventional cardiology


  • Internal Medicine - Cardiovascular Disease

Specialty Interests

General cardiology, coronary artery disease, dyslipidemia (lipid disorders), structural heart disease, cardiovascular disease, hypertension (high blood pressure)

Research & Publications

Research & Publications

See publications for John Mansour, 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 5/2/2023, Dr. Mansour 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

152 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
Listens 5
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

18 Patient Comments

Reviewed on Apr 17, 2023

My experience with Dr. Mansour has been excellent. He is a caring professional who carefully listens and fully answers any questions.

Reviewed on Mar 20, 2023

Dr. Mansour is an excellent communicator.

Reviewed on Feb 15, 2023

Wonderful doctor

Reviewed on Jan 23, 2023

I would give Dr. Mansour high remarks ! He was very thorough explaining everything. Took his time with all our questions ! My husband and I were very pleased with him. I would highly recommend him.

Reviewed on Jan 19, 2023

I have 2 main concerns:1. I feel like I wasn't listened to when explaining my current health issues. 2. I was prescribed a medication that Ive still not received (1week later). My health is unimportant to you. I feel what is important is getting me in and out of the office rather than truly caring.

Reviewed on Jan 18, 2023

Dr. Mansour is what I expected of The Cleveland Clinic # 1 !

Reviewed on Jan 12, 2023

Dr. Mansour did a great job of asking questions to understand my concerns, considering options, and providing me with a set of actions to address my concern. He also made sure necessary arrangements were made immediately in pursuit of next steps.

Reviewed on Dec 29, 2022

Very good provider!

Reviewed on Dec 14, 2022

Dr Mansour is excellent. Our engagement is as if we have known each other for years. I very much enjoy our visit and engagement.

Reviewed on Dec 12, 2022

Mansour-Excellent doctor! I trust him!

Reviewed on Dec 8, 2022

Everyone was great from the office people to the doctor

Reviewed on Sep 21, 2022

Dr. Mansour is a caring wonderful doctor. He listens and is patient.

Reviewed on Aug 24, 2022

A most vompetant and caring physician.

Reviewed on Aug 22, 2022


Reviewed on Aug 22, 2022


Reviewed on Aug 15, 2022

Dr. Mansour is very nice and seemed concerned with my condition. He was very prompt in getting me the help I need from a surgeon.

Reviewed on Jul 7, 2022

Dr. Mansour has been providing care to me and my family for over 3 years. We are grateful that he is our doctor.

Reviewed on May 26, 2022

Always have had a good experience I have been a patient since 2003 as matter of fact Dr.Cosgrove Was my surgeon and I I have a Dr.Cosgrove mitro valve repair

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