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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 Disease Risk Prevention
  • Cardiovascular Imaging
  • Cardiovascular Imaging Section
  • Cardiovascular Medicine
  • Cardiovascular Medicine Department
  • General Cardiology
  • Heart Imaging
  • Hypertrophic Cardiomyopathy Center
  • Noninvasive Diagnostic Testing
  • Pericardial Diseases Center
  • Stress Testing
View all 12 Treatment & Services +

Specialty in Diseases & Conditions

  • Amyloidosis
  • Aneurysms
  • Angina
  • Aorta Disease
  • Aortic Aneurysms
  • Aortic Occlusion (Blockage)
  • Aortic Regurgitation
  • Aortic Stenosis
  • Atherosclerosis
  • Atrial Septal Defects
  • Cardiovascular Disease
  • 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 Blood Pressure (Hypertension)
  • High Cholesterol
  • 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 39 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

Fellowship - Cleveland Clinic
Cleveland, OH

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

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

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 4/11/2024, Dr. Thamilarasan has reported the financial relationships with the companies listed below. 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

285 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 4.5
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

44 Patient Comments

Reviewed on May 24, 2024

Dr. Thamilarasan was an amazing provider, he listened and addressed my concerns.

Reviewed on May 24, 2024

The Best Staff and Doctors. Love Doctor T

Reviewed on May 14, 2024

Dr Tamilarasan has been a very important part of my overall care for many years.I find him to be very knowledgeable and trusting.

Reviewed on May 14, 2024

Dr Thalmalarison's office always sends me personal reminders of when I should schedule my next visits. I appreciate that!

Reviewed on May 14, 2024

Dr Thalmalarison is simply the best. I'm very pleased to be one of his patients and know that my situation is being well managed. He's a blessing!

Reviewed on May 3, 2024

Dr. Thamilarasan is the most personable and educated doctor I know. Excellent explanations about my heart condition!

Reviewed on May 3, 2024

Dr Thamilarasan has a great ability to answer all of my questions and explain to me in layman's terminology what the problem is and options to rectify the medical issue. I have recommended Cleveland Clinic to a number of people and will continue to do so. I feel that I am in good hands with the whole cardiology staff.

Reviewed on Apr 26, 2024

Dr. Thamilarasan is the biggest reason we continue to come to the clinic. He is always so incredibly well informed, answers our questions, and provides us with reassurance as needed. He is patient and takes his time with us without making us feel rushed

Reviewed on Apr 23, 2024

Dr. Thamilarasan is always very courteous and offers to answers any questions or concerns I might have.

Reviewed on Apr 23, 2024

Dr is excellent- I was concerned w/ Dr Lever retiring no worrying now

Reviewed on Apr 12, 2024

Dr. Thamilarasan has to be one of the best I have encountered. His knowledge of my condition Is absolute. I'm very happy the I made the choice to come to Cleveland Clinic.

Reviewed on Apr 2, 2024

Dr. Thamilarasan is awesome, returns my emails promptly when I have any concerns or updates.

Reviewed on Apr 2, 2024

Until I contact my doctor directly, I was able to obtain an appointment

Reviewed on Apr 2, 2024

Dr. Thamilarasan is a tremendous caregiver and doctor! We have already recommended him to others even that very day! My husband and I have great respect for him.

Reviewed on Feb 13, 2024

Dr Thamilarasan is the best Dr I have ever had throughout my life. He hears me and respects my wishes when it comes to my treatment. That is so very important. I trust him and he is very important to me. I dread to think there will be a day when he is no longer my cardiologist .

Reviewed on Feb 6, 2024

I couldn't ask for a better doctor! Dr. Thamilarasan is very thorough, knowledgeable, respectful and extremely personable. He is truly the best doctor I ever had!

Reviewed on Jan 23, 2024

Dr. Thamilarasan has provided wonderful care since I was first referred to him in 2007!

Reviewed on Jan 19, 2024

Outstanding care! Dr Thamilarasan was so patient and kind. He explained everything to me, sent me for one additional test and MADE TIME FOR ME to come back the same day to discuss the test results.

Reviewed on Jan 5, 2024

Everything was perfect and timely very polite staff and doctor! Thanks

Reviewed on Dec 29, 2023

This doctor was one of the best I have ever met.

Reviewed on Dec 29, 2023

Dr Thamilarasan is always terrific!

Reviewed on Dec 19, 2023

I'm impressed with the professionalism and concern for patients. Everyone we met was kind and knowledgeable. Dr Thamalarson took time to explain everything and answered all my questions. He made me feel comfortable that I was in excellent hands. I am so thankful that I came to Cleveland Clinic!!

Reviewed on Dec 12, 2023

Dr Thamilarasan goes over my tests results thoroughly and answers any questions that I have concerning my care.

Reviewed on Dec 12, 2023

A day's visit equivalent to my six months visit in my local doctor's visit and tests, amazing!

Reviewed on Dec 1, 2023

Dr. Thamilarasen and Lawanda are so responsive and professional. They are both excellent examples of the quality of Cleveland Clinic.

Reviewed on Nov 3, 2023

Dr. Thamilarasan is top notch and has me on the right track. Best cardiologist I have seen in 50 years.

Reviewed on Nov 3, 2023

Extremely efficient from EKG to doc visit

Reviewed on Nov 3, 2023

Dr. Tham was very patient, communicative, caring and knowledgeable.

Reviewed on Oct 13, 2023

I have recommended Dr. Thamilarisan to Several family members and friends. He is absolutely the best.

Reviewed on Sep 22, 2023

Dr T is the best; always on top of my needs with excellent folllw-up!

Reviewed on Sep 5, 2023

Dr. Thamilarasan is an outstanding doctor and cardiologist. I could not be more pleased with whom I chose to care for me. If all caregivers were like Dr. Themilarasan the medical world would be perfect. Never once has he been hurried or rushed. His focus has always been on me, my heart, and over all health. In fact Dr. Themilarasan shines brightly among some of Cleveland Clinic finest i.e. Dr. Earl K. Shirey, Dr. Gil, and Dr. A. Marc Gillinov. All have cared for me from babe to current age of 64. A child who was not expected to live to be 6 months old will soon be 65 thanks be to God and the caregivers at Cleveland Clinic.

Reviewed on Aug 29, 2023

Dr. T is great and I have been seeing him for years.

Reviewed on Aug 29, 2023

Outstanding Doctor

Reviewed on Aug 29, 2023

Dr Thamilarasan has always given good care, good follow up! Excellent doctor who cares!

Reviewed on Aug 15, 2023

With Dr Thamilarasan my appointment is very special. He is a very kind, knowledgeable doctor who answers all my questions and makes me feel very important. Great bed side manner.

Reviewed on Aug 15, 2023

Will definitely recommend Dr Thamilarasan

Reviewed on Aug 4, 2023

I can not say enough wonderful things about Dr Thamilarsan. He is caring, personable, respectful and answers all questions. He Is always ready to help and try to solve any medical problem. I highly recommend him as one of the best doctors I have ever had.

Reviewed on Jul 28, 2023

I would recommend, and have recommended Dr. Thamilarasan to anyone! He is amazing!

Reviewed on Jul 25, 2023

I work overseas and only come to Ohio once or twice a year. As such, getting an appointment during the short window that I am home is critical. Luckily, Dr Thamilarasan and team has always been able to fit me in - including in July when I had to make a last minute change to my travel plans. I greatly appreciate this!

Reviewed on Jul 25, 2023

Dr. Thamilarasan Is the ultimate cardiologist! He is very nice, personable, respectful, and competent! I have full trust in him to give me the best care! I've been seeing him for more than 10 years and I make it a point to go to Ohio from wherever I am assigned overseas for my annual checks!

Reviewed on Jul 7, 2023

I can always talk to Dr. Thamilarasan when I am not feeling well.

Reviewed on Jun 20, 2023

Doctor Thamilarison is why I drive 2 1/2 hours for care.

Reviewed on Jun 20, 2023

Dr. Thamilarasan listens to every word I say. He thoroughly discusses my concerns and explains every detail of my care.

Reviewed on Jun 13, 2023

Dr. Thamilarasan is excellent!!! He is professional, personable, knowledgeable and thorough. He is also responsive and empathetic. I would recommend him to anyone needing a cardiologist.

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