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 +


Is Cleveland Clinic Part of Your Insurance?

Review a list of accepted insurance plans for our Northeast Ohio locations or learn more about purchasing a contracted managed care plan.

View All Plans

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 Education - 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 Education - 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 4/8/2019, 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

209 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 4.9
Listens 5
Courtesy, Respect & Concern 5
Knows Medical History 5
Time Spent with Patient 5
Patient Rating of Doctor 5

40 Patient Comments

Reviewed on Oct 3, 2019

Dr Phelan is the most professional and caring and wonderful doctor I've ever had and my family and I are so blessed to have him.

Reviewed on Sep 26, 2019

Excellent Physician-very responsive and caring.

Reviewed on Sep 26, 2019

Dr. Phelan and his staff put us at ease immediately upon arrival. Dr. Phelan explained in detail and with the help of computer access, my problem. We so appreciate his expertise.

Reviewed on Sep 10, 2019

The first comment above captures how very satisfied I have been with Dr. Phelan and the care I have received under his care.

Reviewed on Sep 10, 2019

it is always a pleasure going to him. he is a wonderful doctor and man. it is a pleasure being with him.

Reviewed on Sep 5, 2019

Dr. Phelan was outstanding.

Reviewed on Aug 15, 2019

Very good experience with Dr Phelan.

Reviewed on Aug 13, 2019

In my opinion, Dr. Phelan is an exaordinairly communicative and caring physician

Reviewed on Aug 13, 2019

dr. phelan is an amazing physician. he's ability to just have normal conversation that allows the patient to feel comfortable to answer questions freely tops. he also understands the art asking questions different ways to ensure he gets the information he needs to do what best for the patient.

Reviewed on Jul 16, 2019

It was obvious that Dr Phelan mastered all of my records before he even saw me. He was a consummate professional while being personable throughout our meeting. He listened to our concerns and questions without the slightest interruption. His explanations were clearly stated. He was reassuring. His care plan made perfect sense to us. I am proud and blessed that he is my CC cardiologist.

Reviewed on Jul 2, 2019

Dr Phelan is an excellent physician who shows the utmost care yo his patients.

Reviewed on Jul 1, 2019

I was very impressed with my doctor. He was personable and very east to talk to. He answered all my questions and treated me with respect.

Reviewed on Jun 18, 2019

Dr Phelan listened to all of my health concerns then conducted necessary tests then made references to needed physicians

Reviewed on Jun 18, 2019

not only do i feel listened to i feel "heard". i believe my doctor really cares for my well being

Reviewed on Jun 18, 2019

Dr. Phelan took time to thoroughly explain test results to me and answered all my questions and concerns. I did not feel rushed and left the office feeling very positive about my visit.

Reviewed on Jun 4, 2019

i had some concerns about my condition and did voice them to Dr Phelan. At the office visit we discussed those concerns and even though I did not request this, he even called me when I was on my way home to relieve my concerns. Not only is he an excellent doctor, he also is thorough and compassionate.

Reviewed on May 21, 2019

Dr Phelan was friendly and also concerned with my wellbeing.

Reviewed on May 21, 2019

I am very impressed with Dr. Phelan's concern for his patients! These are the kind of doctors that bless the halls of the Cleveland Clinic!

Reviewed on May 14, 2019

Honored and humbled to have Dr. Phelen as my cardiologist. I feel very confident in his care.

Reviewed on May 10, 2019

Dr Phelan is an amazing provider and speaks to me with respect and explains things so that I can understand them.

Reviewed on Apr 22, 2019

Great services. Outstanding Doctor.

Reviewed on Apr 22, 2019

best Dr that I have seen for my condition

Reviewed on Mar 26, 2019

I feel very confident in my Dr Phelan ability s to help me in anyway possible!! He was kind and i felt very well taken care of!!!

Reviewed on Mar 19, 2019

this doctor had excellent bed side manner and was very deliberate in his explanation

Reviewed on Mar 19, 2019

i like dr Phelan. he's always patient and informative.

Reviewed on Mar 15, 2019

Dr Phelan was very kind and courteous. He explained my condition and options to not just myself, but my family He ansered all of my questions and concerns. I tell everyone I know about his patience and williness to explain and anser all the questions they may have. I highly reccommend him to everyone.

Reviewed on Mar 12, 2019

Dr. Phelan was very efficient and clear in his assumptions and diagnosis. He was to the point but still allowed me to question or respond. Thank him.

Reviewed on Mar 12, 2019

Dr. Scharalaya spent significant time listening to me explain what I was looking for and what was happening with me. She asked pertinent questions to get further information. She was very patient but kept the process moving.

Reviewed on Mar 12, 2019

There are not enough good words to describe Dr. Dermot Phelan. He comes into the exam room fully prepared. He listens to every word. He maintains eye contact. He answers in great detail any question I may have. He makes sure I understand and that my question has been fully answered. He is NEVER in a hurry, although I am sure I'm not the only person he will see that day. He is simply the best doctor I have ever been treated by in my 76 years.

Reviewed on Mar 6, 2019

Dr. Phelan was very thorough and explained everything very well. He analyzed my situation and ordered some additional tests that would give him a clearer picture of what is going on, which made me feel more comfortable about someone taking an interest in my situation.

Reviewed on Mar 5, 2019

I would recommend Dr. Phelan to anyone who needed help. He was very kind and knowledgeable. He explained my condition in terms I could easily understand and also explained what needed to be done in the same easy terms.

Reviewed on Feb 19, 2019

Dr. Phelen is an amazing person with an amazing manner- He is respectful and kind- he is probably the most intelligent and caring doctor I have ever met .He has been my Son Ryans and my doctor for 4 years now . He has always kept our dignity in tact , cared for us with real feeling. There have been times we have disagreed on treatment - it never mattered - he supported me and took care of me . I should also mention he saved my life! I was misdiagnosed with aortic stenosis and told to keep running - I got sick at a race and happen to find Dr. Phelan. I am truly blessed as is the clinic

Reviewed on Feb 12, 2019

MyChart does not permit making any contact with a doctor I have not seen in the previous 15 months. I see one specialist every 2 years and another every 5 years. So I have to make arrangements by phone. And even after scheduling an appointment, I cannot message the doctor until after the appointment.

Reviewed on Feb 12, 2019

the doctor has a most excellent staff.

Reviewed on Jan 15, 2019

Love Dr. Phelan. He is an attentive, sweet, and very kind individual. I have great confidence in him as a physician.

Reviewed on Jan 8, 2019

Dr. Phelan's knowledge, patient focus and overall way he communicates and deals with people is nothing short of outstanding. His bedside manner and patient respect and empath is the best I've ever seen. i look forward to my annual checkups just to see him, hear his wisdom and reconnect our wonderful relationship. I feel so fortunate to have him as my doctor and Cleveland Clinic as my hospital. Thank you to the entire staff you are all wonderful!!

Reviewed on Dec 18, 2018

Dr. Phelan was extraordinary - informative, professional, and willing to tailor his recommendations to my aspirations.

Reviewed on Dec 18, 2018

Dr. Phelan was very helpful in suggesting a plan for a medication change if needed in the future

Reviewed on Nov 27, 2018

I found Dr. Phelan to be very knowledgeable and easy to talk to. I had a thoroughly enjoyable appointment with him.

Reviewed on Nov 23, 2018

Dr Phelan called me the evening of all my tests and my appointment to let me know the results, and his recommendations for surgery. I felt he was above and beyond expectations!

Related Videos Featuring Dermot Phelan, MD, PhD

Related Videos Featuring Dermot Phelan, MD, PhD

Back to Top