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

Cleveland Clinic Main Campus


Additional Locations

Specialties & Treatments

Treatment & Services

  • Aorta Center
  • Cardiovascular Imaging
  • Cardiovascular Imaging Section
  • Cardiovascular Medicine
  • Cardiovascular Medicine Department
  • Hypertrophic Cardiomyopathy Center
  • Pericardial Diseases Center
  • Sports Cardiology Center
View all 8 Treatment & Services +

Specialty in Diseases & Conditions

  • Aorta Disease
  • Aortic Regurgitation
  • Aortic Stenosis
  • Asymptomatic Valve Dysfunction
  • Cardiomyopathy
  • Constrictive-Pericarditis
  • Ehlers-Danlos Syndrome
  • Endocarditis
  • Heart Disease
  • Heart Murmur
  • Heart Valve Disease
  • Hypertension - High Blood Pressure
  • Hypertrophic Cardiomyopathy
  • Infective Endocarditis
  • Infiltrative Cardiomyopathy
  • Ischemic Cardiomyopathy
  • Marfan Syndrome
  • Mitral Valve Prolapse
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Myocardial Ischemia
  • Pericardial Effusion
  • Pericarditis
  • Pulmonary Valve Disease
  • Rheumatic Heart Disease
  • Shortness Of Breath
  • Sports Cardiology
  • Sudden Cardiac Death (Sudden Cardiac Arrest)
  • Syncope
  • Tricuspid Regurgitation
  • Tricuspid Stenosis
  • Tricuspid Valve Disease
View all 32 Specialties +


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About Dermot Phelan, MD, PhD

Dermot Phelan, MD, PhD, FACC, is a staff cardiologist in the section of Cardiovascular Imaging in the Robert and Suzanne Tomsich Department of Cardiovascular Medicine, and Medical Director of the Sports Cardiology Center in the Sydell and Arnold Miller Family Heart & Vascular Institute at Cleveland Clinic. He is an Assistant Professor at the Cleveland Clinic Lerner College of Medicine of Case Western Reserve University. Dr. Phelan is a course Co-Director for the Cleveland Clinic echocardiography national meeting and serves on the Research Council of the American Society of Echocardiography. He is Co-Editor of the cardiology section of Disease Management, a free, online clinical resource authored by Cleveland Clinic physicians that has more than 800,000 page views per month.

Dr. Phelan is the team cardiologist for the Cleveland Cavaliers. He also serves on the Cardiac Screening Advisory Committee for the National Basketball Association. Dr. Phelan attends the National Football League Scouting Combine each year as the Cardiology Consultant for the team physicians. In this role, he reviews all of the cardiovascular testing for the players and makes decisions regarding safe participation at the Combine. Dr. Phelan’s passion about cardiac care of athletes extends beyond professional players to athletes of all skill level and age.

In addition to office visits, Dr. Phelan 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: Cardiac care in athletes, hypertrophic cardiomyopathy (HCM), valvular heart disease, cardiomyopathy, cardiovascular imaging

Number of Procedures Performed: Cleveland Clinic physicians perform more than 72,000 echocardiograms each year. Of these, Dr. Phelan performs nearly 4,000 echocardiography studies, including transesophageal echos, preprocedural imaging and intraoperative imaging to guide surgery.

Success rates: Cleveland Clinic has been ranked the #1 hospital for cardiology and heart surgery by U.S. News & World Report since 1994. Success rates for specific procedures are available at:

Education and Training: Dr. Phelan earned his undergraduate degree and doctorate degrees from University College Dublin, Ireland. After completing his medical degree, he divided a two-year residency in medicine between Royal North Shore Hospital, Sydney, Australia, and Saint Vincent’s University Hospital, Dublin, Ireland. Following a six-month fellowship in cardiology at Mater Misericordiae University Hospital in Dublin, he returned to University College Dublin as a PhD Clinical Scientist Fellow. Following this experience he served a fellowship in cardiology, training in three hospitals in Dublin and Galway, Ireland. He completed his training with an advanced cardiovascular imaging fellowship at Cleveland Clinic. Dr. Phelan joined the Cleveland Clinic staff in 2013.

Publications and Speaking:  Dr. Phelan has authored or coauthored two dozen articles in peer-reviewed medical journals and has written multiple chapters in a medical text books and study guides. He has delivered multiple research abstract presentations and is a regularly invited speaker at national medical meetings and conferences.   

About Dr. Phelan: "Being an athlete in my youth drove my passion for treating athletes and becoming a physician to help them overcome their medical challenges.”

Leisure Activities: Outside of medicine, Dr. Phelan enjoys cycling and other sports and spending time with his family and young children.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Advanced Cardiovascular Imaging
Cleveland, OH USA

Medical School - University College of Dublin, Faculty of Medicine

Fellowship - University College Hospital, Galway

Fellowship - Saint James Hospital
Specialist Registrar in Cardiology

Fellowship - St. Columcille Hospital
Specialist Registrar Cardiology

Fellowship - University College Dublin (National University of Ireland)
Clinical Scientist Fellow

Fellowship - Mater Misericordiade Hospital
Registrar Cardiology

Residency - Saint Vincent's Hospital
Cardiology, General Internal Medicine, Gastroenterology

Residency - Royal North Shore Hospital
Emergency Medicine, General Internal Medicine
St. Leonards, NSW,

Internship - Saint Vincent's Hospital

Medical School - University College of Dublin, Faculty of Medicine

Specialty Interests

Cardiac care in athletes, hypertrophic cardiomyopathy (HCM), valvular heart disease, cardiomyopathy, cardiovascular imaging, echocardiography

Research & Publications

Research & Publications

See publications for Dermot Phelan, MD, PhD.

(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 6/4/2018, Dr. Phelan 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

176 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
5 out of 5
Explains 5
Listens 5
Courtesy, Respect & Concern 5
Knows Medical History 4.9
Time Spent with Patient 5
Patient Rating of Doctor 4.9

21 Patient Comments

Reviewed on Sep 25, 2018

Dr Phelan is the overall best doctor that I have ever seen for any condition.

Reviewed on Sep 25, 2018

Great visit, I learned a lot from my doctor, things I needed to know.

Reviewed on Aug 31, 2018

Dr Phelan is outstanding in every measurable category and I would highly recommend him - especially for current or former athletes.

Reviewed on Aug 30, 2018

Dr. Phelan was excellent in every way! easy to understand, spent a generous amount of time, answered all questions, was especially knowledgeable. great experience.

Reviewed on Aug 21, 2018

top-notch (excellent) camaraderie and collaboration of my provider with other physicians and medical professionals and done during my visit.

Reviewed on Aug 21, 2018

This is a super physician and staff.

Reviewed on Aug 21, 2018

I'm very glad I see this physician.

Reviewed on Aug 21, 2018

Dr. Phelan did an excellent job in listening to my thoughts and concerns about my conditions and answered any and all of my questions. He thoroughly explained what my conditions were and what he thought which was the priority and how they needed to be treated. I came away feeling I was in good hands and better understood my medical conditions and what the future prognosis was. I highly recommend Dr. Phelan and his staff.

Reviewed on Jul 24, 2018

I thought Dr. Phelan and staff were terrific, knowledgeable, and approachable. The cardiac workup was very thorough. Thiis was an initial visit and I will continue care with Dr. Phelan

Reviewed on Jul 17, 2018

actually I arrived early for my ECG and Echo tests and I was taken very soon. I had little wait even though I was there before my scheduled appointment time.that was very nice. I got done earlier than expected. Dr Phelan is one of two doctors I have ever had that has great communication skills. he answers all questions, explains everything clearly and will tell you 'why' is you want. He is a pleasant, professional gentleman and a pleasure to visit and discuss my health issues.

Reviewed on May 15, 2018

excellent doctor. highly recommend. I drove over three hours to see him and would do it again.

Reviewed on May 15, 2018

This was my first time visiting the Cleveland Clinic. it was far superior to any medical institution I have dealt with. Dr. Phelan was outstanding. It is very easy to see why the Clinic is rated #1 for heart care.

Reviewed on May 8, 2018

Dr. Phalen said he would call me the next morning with test results. He called me at 8:30 the next morning. what a pleasant surprise. I am so happy with his care.

Reviewed on May 1, 2018

The doctor listened carefully to my concerns and gave me the information that I needed for follow-up care.

Reviewed on Apr 27, 2018

I have continued to have a great experience with Dr Phelan. he is very caring of my condition and calls me directly to explain matters to me prior to my reading test results on My Chart. i believe i am in great hands.

Reviewed on Apr 24, 2018

Dr Phelan was wonderful. I really like him a lot.He takes his time with you and he listens, doesn't rush you. Best doctor I ever saw.

Reviewed on Apr 17, 2018

Dr. Phelan is an absolutely excellent professional, who treat, respect and care about human beings. He make me feel as I am special, listened to me discuss possible treatments with me. I feel a lot better now than before my appointment with him. I was lucky to on my decision to visit him. I admire his level of confidence in his expertise. Long live Dr. Phelan. I cordially appreciate your care and advice. Keep up with a good job!!!!

Reviewed on Apr 17, 2018

Dr. Phelan was excellent and gave my a great referral.

Reviewed on Apr 10, 2018

Dr Phelan has saved my life numerous of times. he is a great Dr.will.never change Drs.

Reviewed on Apr 10, 2018

Dr Phelan is always there for his patients whether you have an appointment or not

Reviewed on Feb 13, 2018

Dr Phelan is the most impressive doctor I've ever had an appointment with. He made me feel like I was the only patient he had. I can't say enough good things about him. I'm lucky to have had him for my evaluation.

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