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

Cleveland Clinic Main Campus

Specialties & Treatments

Treatment & Services

  • Aorta Center
  • Cardiovascular Imaging
  • Cardiovascular Imaging Section
  • Cardiovascular Medicine Department
  • General Cardiology
  • Heart Imaging
  • Hypertrophic Cardiomyopathy Center
  • Non-Invasive Diagnostic Testing
  • Pericardial Diseases Center
  • Stress Testing
View all 10 Treatment & Services +

Specialty in Diseases & Conditions

  • Amyloidosis
  • Aneurysms
  • Angina
  • Aorta Disease
  • Aortic Aneurysms
  • Aortic Occlusion (blockage)
  • Aortic Regurgitation
  • Aortic Stenosis
  • Atherosclerosis (vascular)
  • Atrial Septal Defects
  • Cardiovascular Disease
  • Cardiovascular Risk Prevention
  • Congenital Valve Disease
  • Coronary Artery Disease
  • Ehlers-Danlos Syndrome
  • Endocarditis
  • Heart Attack
  • Heart Disease
  • Heart Murmur
  • Heart Related Illnesses
  • Heart Valve Disease
  • Heart Valve Infections
  • High Cholesterol
  • Hypertension - High Blood Pressure
  • Hypertrophic Cardiomyopathy
  • Marfan Syndrome
  • Mitral Valve Prolapse
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Myxomas
  • Pericardial Cyst
  • Pericardial Disease
  • Pericardial Effusion
  • Pericarditis
  • Pulmonary Valve Disease
  • Pulmonary Valve Stenosis
  • Restrictive Cardiomyopathy
  • Rheumatic Heart Disease
  • Thoracic Aortic Aneurysm
  • Tricuspid Valve Disease
View all 40 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 Maran Thamilarasan, MD

Maran Thamilarasan, MD, is a staff cardiologist in the Section of Cardiovascular Imaging, the Robert and Suzanne Tomsich Department of Cardiovascular Medicine, at the Sydell and Arnold Miller Family Heart, Vascular & Thoracic Institute. Board-certified as a Diplomate in cardiovascular disease, Dr. Thamilarasan also is certified Diplomate by the National Board of Medical Examiners. He is also certified by the National Board of Echocardiography. He has focused his specialty interests on echocardiography, valvular heart disease, hypertrophic cardiomyopathy, diseases of the aorta and coronary artery disease.

A native of India, Dr. Thamilarasan grew up in the United States. He did his undergraduate work in biomedical sciences and political science at the University of Michigan at Ann Arbor, graduating with Highest Distinction and inducted into Phi Beta Kappa. As an undergraduate, Dr. Thamilarasan received the James B. Angell Scholar Award and the Regents-Alumni Scholarship Award. He continued on at the University of Michigan to receive his medical degree, graduating cum laude. He was inducted into the Alpha Omega Alpha Medical Honor Society, and received the American Society of Clinical Pathologist's Award.

Dr. Thamilarasan did his internship and residency in internal medicine at the University of Michigan Medical Center. Cleveland Clinic awarded him a fellowship in cardiology followed by an advanced fellowship in cardiac imaging. He has been with the Cleveland Clinic since 1995.

He has authored or co-authored chapters in medical textbooks on mitral valve disease, thrombolytic therapy and transesophageal echocardiography, among others. He has published articles and abstracts on his specialty interests in peer-reviewed publications such as Circulation, American Heart Journal, and the American Journal of Cardiology. He has presented his clinical experiences and abstracts at courses sponsored by the American College of Cardiology and the American Society of Echocardiography.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Advanced Cardiac Imaging
Cleveland, OH USA

Fellowship - Cleveland Clinic
Cleveland, OH USA

Residency - University of Michigan Health System
Internal Medicine
Ann Arbor, MI USA

Medical Education - University of Michigan Medical School
Ann Arbor, MI USA

Additional Training

  • Master's of Science, clinical research design and statistical analysis, University of Michigan, 2005


  • Internal Medicine - Cardiovascular Disease

Specialty Interests

Heart Valve Disease, Hypertrophic Cardiomyopathy, Marfan Syndrome, Pericardial Disease, Pericarditis, Thoracic Aortic Aneurysm, Cardiovascular Imaging, Echocardiogram, Non-Invasive Diagnostic Testing

Research & Publications

Research & Publications

See publications for Maran Thamilarasan, 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 3/30/2020, Dr. Thamilarasan 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

234 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 4.3
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

52 Patient Comments

Reviewed on Jan 31, 2020

Dr Thamilarisan always takes the time to make sure I understand my condition and treatment and also to make sure I get all my questions answered.

Reviewed on Jan 17, 2020

Dr Thamilsrsan was very well read on my case. He listened to my concerns.

Reviewed on Jan 17, 2020

Dr Thamilarasan is the best.

Reviewed on Jan 14, 2020

Dr Thamilarasan met with me twice that day to discuss my test results. He didn't rush the appts, he made sure my questions and concerns were answered. nice guy!

Reviewed on Nov 29, 2019

I had done some research on the doctor before my appointment. And it was quite obvious why there were only positive comments about his interaction with patients. I joined a host of fans who were certainly well taken care of by this doctor.

Reviewed on Nov 25, 2019

Best doctor visit I have ever had! Went into everything with such great detail.

Reviewed on Nov 19, 2019

great Doctor

Reviewed on Oct 29, 2019

provider did not ask or convince me to come to the Cleveland Clinic for further service.

Reviewed on Oct 29, 2019

amazing doctor who over communicates in a great way

Reviewed on Oct 22, 2019

DrThamilarison is an excellent doctor. He makes me feel like I am his only patient.

Reviewed on Oct 18, 2019

Dr. Thomalarasen was remarkable in his kindness, thoroughness and follow through. We couldn't have been more pleased with his demeanor and attitude.

Reviewed on Sep 27, 2019

I recommended family and friends to Dr. Thamilarisen. I've been a patient of his for maybe 15 years or longer. He's the best cardiologist I've ever known. Everyone I've sent to him feels the same way.

Reviewed on Sep 24, 2019

I really did not make calls to the Clinic. But Dr did call me to explain something and I felt so good that he would take the time in the evening to call me.

Reviewed on Sep 24, 2019

Dr made me feel confident and relaxed in his care.

Reviewed on Sep 20, 2019

Best doctor I've ever seen in my 58 years. The same goes for his fellow. Best care I've ever received in my life

Reviewed on Sep 17, 2019

Dr. was very nice and explained things well.

Reviewed on Sep 6, 2019

top notch Doctor whom I will recommend to anyone with Carrie issues!

Reviewed on Sep 3, 2019

Dr. Thamilarason is knowledgeable and caring. He listens and demonstrates client-centered care, which i appreciate.

Reviewed on Aug 23, 2019

I have the utmost respect for Dr. Thamilarasan. I value his opinion and he is excellent at describing results of tests and any upcoming procedures.

Reviewed on Aug 23, 2019

Five tests and Dr appointment scheduled. Every scheduled appointment was on time and only one 10 minutes late. Dr T was kind and listened to me. He explained all tests thoroughly and called me later that day to provide me results of blood work taken after I had seen him. my appointment was on a Friday and my family physician had Dr T's written report by Tuesday.

Reviewed on Aug 20, 2019

I have been a patient of Dr. Thamilarasan for many years. The staff at J1-5 is always couteous, kind, and helpful.

Reviewed on Aug 20, 2019

Dr. Thamilarasan, as usual, was so wonderful. He always listens to me, and helps me understand my health status, and what to expect as I go along.

Reviewed on Jul 30, 2019

dr.T is terrific

Reviewed on Jul 23, 2019

was impressed with Dr Thamilarasan and felt he listened to my concerns and after reviewing the all the tests I had that day he gave me good advice. I have great confidence in the knowledge he has about hypertrophic cardiomyopathy and my issues

Reviewed on Jul 23, 2019

I have much respect for Dr. Thamilarasan, he is a wonderful doctor with caring concern about his patients health. I would recommend him to anyone.

Reviewed on Jul 9, 2019

great Doctor

Reviewed on Jul 2, 2019

Dr. Thamilarasan was great! He took the time to explain things about my condition to me and made sure I understood. Answered all my questions. Was very courteous and understanding. When leaving, Dr. Thamilarasan said to call anytime with any questions I may have. I called the next day and spoke to staff and had a call back from Dr. Thamilarasan within 30 minutes.

Reviewed on Jun 28, 2019

Dr Thamilarsan is an amazing doctor. He is kind, courteous and caring. He cares about his patients. He makes sure he acknowledges my spouse. I had a wound on my leg and he looked at it and took time to bandaged it even that was not his field. He said since I am not used to doing this but just dealing with the heart I will try my best. He also had his staff take to direct us where I could go to have it taken care of.

Reviewed on Jun 25, 2019

In addition to Dr. Thamilarasan - who was excellent - I also met with MANY other "providers" throughout the day. My rankings above ALSO apply equally to each of those other providers. I continued being impressed with everyone that I met with at CC as the day progressed.

Reviewed on Jun 25, 2019

A unique medical experience for me! I was amazed at the fact that the results of most of the tests that I underwent during the course of the day were consolidated by days end and it was obvious that Dr. Thamilarasan had already reviewed them before our wrap-up meeting at the end of the day.

Reviewed on Jun 7, 2019

Dr. Thamalarsan is the most caring and kind doctor. He is very thorough in his examinations. I always feel he cares about me as a person.

Reviewed on Jun 7, 2019

No bad experiences. Good experiences---Everything went like clockwork. The technicians giving the EKG and ECO were very detailed in their instructions speaking loud enough and slow enough for me with hearing aids to understand them. The nurse who took vitals and reviewed information prior to Dr. Thamilarasan's visit was just as efficient and understandable. As always, Dr. Thamilarasan checked me over and explained the results of the tests. Very good.

Reviewed on Jun 4, 2019

Doctor Thamilarasan and his staff are always very personable and caring

Reviewed on Jun 4, 2019

Dr T. is a wonderful doctor and person. He is a very thoughtful and proactive partner in my medical care.

Reviewed on Jun 4, 2019

Dr T and the genetics team work together seamlessly

Reviewed on May 24, 2019

Dr. Thamilarasan was patient with my mother. Explained everything to us and answered all our questions. He spent about 20 minutes with us the first visit. She had her Echo (which are very grateful they were able to move up) then we returned to see the dr. He then spent another 20 minutes or so with us going over her tests and answering questions.

Reviewed on May 10, 2019

Dr Thamilarasan is always patient and answers all of my questions; he is very caring and even called me later that day with my results .

Reviewed on May 3, 2019

love Dr. Tam

Reviewed on Apr 26, 2019

excellent in every way the Doctor was great

Reviewed on Apr 26, 2019

Dr. Thamilarasan is the kindest, most sincere, caring doctor I have ever met! I have been his patient for 15 years now and I feel blessed to have him taking care of me.

Reviewed on Apr 26, 2019

Dr. Thamilarasan's nurse is great at putting me at ease and making me feel comfortable.

Reviewed on Apr 16, 2019

i love dr t. he has helped save my life by referring me to other docs at Cleveland and then working as a team to optimize my care. Everywhere else we go , gets compared to Cleveland clinic....and they ALWAYS fall short!

Reviewed on Apr 16, 2019

Dr Thamilarisan literally saved my life by rearranging his schedule to get me in to see him sooner rather than later after another local doctor blew off my symptoms. He also arranged for an appointment with a heart failure doctor at the same time.

Reviewed on Apr 12, 2019

Dr. T had obviously read my chart before I arrived and hadn't scheduled me for a stress test based on my recent horrible back problem. He asked if I felt well enough now to do the test instead of the echo because it helped him more when treating me. I was astonished. When was the last time one had a dr. not only read their chart in advance but consult the patient on how to proceed....Probably never..He is amazing.

Reviewed on Apr 5, 2019

I have been a patient at the CC since 2001 including ABR & aneurism repair. The service has been outstanding during this entire time. Dr. Thamilarasan is one of the kindest, considerate & most iknowledgeable doctors I have ever had the good fortune to have care for me. Whenever I have a chance I sing his praises as well as those of the CC. Top notch health care that I recommend often.

Reviewed on Apr 2, 2019

The best possible care & concern. Dr. Maran Thamilarasan was the most able to give me hope, more than any Dr. that I have ever been to. His knowledge of my rare, high risk situation was more than I could have ever dreamed of. After many years of trying to get back to Cleveland Clinic to see him, I thank God I did.

Reviewed on Mar 15, 2019

I had some questions that I forgot in the office. Dr. Thamalarasan got back to me on the phone and answered my question

Reviewed on Mar 15, 2019

I believe Dr. T really cares about the patients. Very good doc

Reviewed on Feb 8, 2019

Dr. Thamilarasan is a jewel, a feather in your cap to have at your Clinic. He was warm, kind, clearly stated information with great compassion. We loved him!

Reviewed on Feb 8, 2019

I have never had a physician who is so courteous, respectful, informative and supportive, or who I know I can count on like I can Dr. Thamilarasan. He is remarkable and I am beyond greatful to be his patient.

Reviewed on Feb 8, 2019

The dr. is so kind and is so respectful of our 93 year old dad. He makes him feel comfortable . Thank you.

Reviewed on Feb 1, 2019

Outstanding doctor. took a great deal of time to fully explain my condition and the entire process.

Related Videos Featuring Maran Thamilarasan, MD

Related Videos Featuring Maran Thamilarasan, MD

Back to Top