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
  • Cardiovascular Medicine Department
  • General Cardiology
  • Heart Imaging
  • Hypertrophic Cardiomyopathy Center
  • Non-Invasive Diagnostic Testing
  • Pericardial Diseases Center
  • Stress Testing
View all 11 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 +


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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 7/6/2020, 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

213 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

49 Patient Comments

Reviewed on Aug 21, 2020

was very impressed with Dr.

Reviewed on Aug 18, 2020

I have been going to this Doctor for thirteen years. I've never had any problems. Always a pleasant experience

Reviewed on Aug 18, 2020

I look forward to my annual visit with this doctor. He is a great caring individual.

Reviewed on Aug 18, 2020

For the past 12 years I have been a patient and Dr. Thamilarasan has been a highly competent and trustworthy cardiologist. I trust his analysis and recommendations for treatment.

Reviewed on Aug 11, 2020

doctor answered every question I had. great dr!

Reviewed on Aug 11, 2020

I have great respect for Dr. Thamilarasan he has been my primary cardiologist for many years. He is understanding, thoughtful, and honest. He has always demonstrated great dialog with me as a patient while taking the time to offer advise. The Cleveland Clinic should be proud to have him as one of their top notch Cardiologists.

Reviewed on Jul 31, 2020

He's great--an absolutely first-class doctor!

Reviewed on Jul 24, 2020

Wonderful Dr listens and is very proactive

Reviewed on Jul 21, 2020

This very knowledgeable cardiologist reviewed my medical history for a scheduled Septal Myectomy with Dr Smedira on July 24th.

Reviewed on Jul 17, 2020

Dr. Thamilarasan is the absolute best! he does it ALL at a very high level!

Reviewed on Jul 17, 2020

Dr. Thamilarasan is the best doctor I've ever had! he is caring, respectful and understanding. Truly the best!

Reviewed on Jul 14, 2020

excellent doctor

Reviewed on Jul 14, 2020

I would definitely recommend the Dr. i have had many doctors and he is number one with me. .

Reviewed on Jul 10, 2020

*Dr. Tham is always calm & patiently answers all of my questions. He is reassuring, thorough & professional & respectful.

Reviewed on Jul 10, 2020

Dr. Thamularison is always excellent in his care and guidance with a honest and caring approach.

Reviewed on Jul 7, 2020

Dr. Tharmalarson, is amazing. He answered questions I had not thought too ask. He presented in a way that was reassuring and eased my anxiety.Truly one of the good ones. I am truly grateful of the Cleveland Clinic.

Reviewed on Jun 23, 2020

Dr T is fantastic.

Reviewed on Jun 19, 2020

Dr Thamilarsan is an excellent doctor. He genuinely cares about his patients. He is caring and very helpful. He answers any questions respectfully even if it is a dumb question. He also includes your spouse in the conversations. He spends the necessary time and does not rush his patients.

Reviewed on Jun 19, 2020

Dr Thamilarasan is an exceptional Physician, he took quality time to answer all my questions in their entirety. Very compassionate, pleasant personality. Thanks to him and his staffs dedication to duty.

Reviewed on Jun 19, 2020

Fantastic way to consult with my provider, Dr Thamilarasan who is exceptional in every way.

Reviewed on Jun 16, 2020

I loved how they set everything up for one day then the dr adjusted according to your needs that day.

Reviewed on Jun 16, 2020

Dr T is a very caring, mild mannered physician whom I trust to handle my health issues.

Reviewed on May 19, 2020

dr was well prepared and he listened well. He asked good questions and assessed my husand's condition as best as he coul with the information he had in hand.

Reviewed on May 8, 2020

Dr. Thamilarasan has helped me very much and is a wonderful doctor. I would recommend him to anyone.

Reviewed on May 1, 2020

I travel from out of town to see my Dr. He is the greatest

Reviewed on Apr 28, 2020

Dr. T made me feel so at ease and did not rush me at all, like many doctors do. was very direct with answers too - not the typical vague responses I sometimes get. thank you!

Reviewed on Apr 21, 2020

it's like seeing a good friend again when he first comes into the exam room. He is very was to talk to. He explain things well. A top-notch doctor. He represents Cleveland Clinic extremely well.

Reviewed on Apr 21, 2020

I have and do highly recommended Cleveland Clinic to others. I certainly would recommend Dr. Thamilarasan.

Reviewed on Mar 10, 2020

I was so very lucky to have Dr T to talk to before surgery - he calmed my anxiety - awesome bedside manner highly recommend him

Reviewed on Mar 6, 2020

Dr. Thamilarasan is by far the most conscientious physician I have ever had.

Reviewed on Mar 3, 2020

Dr. Thamilarisan is unfailingly kind, pleasant, professional, informative & helpful. he is a wonderful doctor & I trust him.

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.

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