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

Cleveland Clinic Main Campus


Additional Locations

Specialties & Treatments

Treatment & Services

  • cardiac transplant
  • Cardiac Transplantation
  • Cardiology
  • Cardiovascular Medicine Department
  • Endomyocardial Biopsy
  • George M & Linda H Kaufman Center for Heart Failure
  • Heart Biopsy
  • Heart Failure Management
  • Heart Failure Section
  • Heart Failure Surgery
  • Heart Transplantation
  • Mechanical Assist Devices
  • Pre-Transplant Evaluation
  • Transplant
  • Ventricular Assist Device
View all 15 Treatment & Services +

Specialty in Diseases & Conditions

  • Amyloid Sarcoid Heart Disease
  • Amyloidosis
  • Cancer and the Heart
  • Cardiac Amyloid Imaging
  • Cardiac transplant
  • Cardiomyopathy
  • Cardiomyopathy Secondary to Chemotherapy
  • Cardiomyopathy Valvular
  • Cardiovascular Disease in Women
  • Congestive Heart Failure (CHF)
  • Dilated Cardiomyopathy
  • Ejection Fraction
  • Ejection Fraction - Abnormal
  • Enlarged Heart
  • Familial Amyloidosis
  • Familial Cardiomyopathy
  • Heart Disease
  • Heart Disease - Women
  • Heart Disease & Pregnancy
  • Heart Failure
  • Heart Failure In Women
  • Hypertrophic Cardiomyopathy
  • Infiltrative Cardiomyopathy
  • Ischemic Cardiomyopathy
  • Mechanical Circulatory Support
  • Myocarditis
  • Nonischemic Cardiomyopathy
  • Pulmonary Hypertension
  • Restrictive Cardiomyopathy
  • Sarcoid Heart Disease
  • Shortness Of Breath
View all 31 Specialties +


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About Maria Mountis, DO

Dr. Maria Mountis is Staff in the Division of Cardiology, Section of Heart Failure and Transplantation.  She was appointed to the Cleveland Clinic in 2008.   She is board certified in Internal Medicine, Cardiology, and Advanced Heart Failure and Transplant  by the American Board of Internal Medicine. She is also certified in adult echocardiography by the National Board of Echocardiography.

In addition to office visits, Dr. Mountis also offers scheduled pre-visits and  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:  Diagnosis and treatment of advanced heart failure, cardiac transplantation, mechanical assist devices, pulmonary hypertension, and the cardiac care of women.

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. Mountis is a Pennsylvania native, graduating with a B.S. degree in Biology from Saint Joseph's University, Philadelphia, PA. She received her medical degree from the Philadelphia College of Osteopathic Medicine and completed her internship and residency in Internal Medicine at Lehigh Valley Hospital and Health Network in Allentown, PA. This was followed by her fellowship in Cardiovascular Medicine at Albert Einstein Medical Center in Philadelphia, PA, where she was also appointed Chief Cardiovascular Fellow. She continued her training at the Hospital of the University of Pennsylvania with a fellowship dedicated to the care of patients with Advanced Heart Failure and Cardiac Transplant.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Hospital of The University of Pennsylvania
Heart Failure/Transplant
Philadelphia, PA USA

Fellowship - Albert Einstein Medical Center
Philadelphia, PA USA

Residency - Lehigh Valley Hospital
Internal Medicine
Allentown, PA USA

Internship - Lehigh Valley Hospital
Internal Medicine
Allentown, PA USA

Medical Education - Philadelphia College of Osteopathic Medicine
Philadelphia, PA USA

Undergraduate - Saint Joseph's University
Philadelphia, PA USA


  • Internal Medicine - Advanced Heart Failure and Transplant Cardiology

Specialty Interests

Cardiomyopathy, cardiac tumors, heart failure, heart transplantation, ventricular assist device, myocardial biopsy, cardiac catheterization, heart failure in women, pulmonary hypertension

Awards & Honors

  • American Heart Association, Women in Cardiology Trainee Award for Excellence
  • Chief Cardiovascular Fellow, Albert Einstein Medical Center
  • Fellow, American College of Cardiology
Research & Publications

Research & Publications

See publications for Maria Mountis, DO.

(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 5/15/2020, Dr. Mountis 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

147 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 4.9
Courtesy, Respect & Concern 5
Patient Rating of Doctor 5

32 Patient Comments

Reviewed on Jul 13, 2020

I always have good experience With Dr. Mountis and the Cleveland Clinic.

Reviewed on Jun 24, 2020

Dr. Mountis is the best doctor I have ever had and her office and staff have gone out of their way to help me. She is a doctor who cares and someone I genuinely trust. She is amazing and has an amazing staff.

Reviewed on Jun 24, 2020

I tell everyone that I have hope again from Dr Mountis and she is the first doctor I have ever completely trusted. She has been a god send to me and i am so thankful i found her

Reviewed on Jun 24, 2020

excellent people! Excellent care! I tell everyone how great my doctor is

Reviewed on Jun 19, 2020

Dr. Mountis and her staff are very efficient and accommodating

Reviewed on Jun 19, 2020

Dr. Mountis is very caring, concerned, and thorough

Reviewed on Jun 19, 2020

Dr. Mountis is not only one of the best in her field, but a very caring person. She has always made me feel that she truly cares and always takes the time to go above and beyond to make sure I'm receiving the best care.

Reviewed on May 28, 2020

Dr. Mountis is a very good doctor alway helpful.

Reviewed on May 4, 2020

I always pleased with the care I receive from Dr. Mountis. She's been taking great care of me for nearly six years now.

Reviewed on May 1, 2020

She has been with me from the beginning of my experience. She new when I we'd nervous and calmed me down with her soft spoken words. I have complete trust in her. She's not only my doctor,she's my friend

Reviewed on Apr 28, 2020

I'd give Dr. Mountis all 10s if that was an option!

Reviewed on Mar 19, 2020

Dr. Marie Mountis was very caring, thorough and absolutely wonderful, we couldn't have been more pleased. We are extremely grateful and look forward to working with her in the future.

Reviewed on Mar 2, 2020

I am very pleased with the care I receive from *Dr. Mountis.

Reviewed on Feb 20, 2020

Dr Montis literally changed my life and I cannot say enough good about her! Last year at this time I could hardly do anything because of my bad heart and was being evaluated for a heart transplant. Dr Montis took the time, ordered some tests, changed my meds and changed my life! Dr Montis knows her stuff! She takes the time, never rushes and is very caring. I would highly recommend her to everyone!

Reviewed on Feb 10, 2020

excellent doctor

Reviewed on Jan 16, 2020

Dr. Mountis's secretary Melissa is a gem. She is very helpful and and reliable and always follows up as promised.

Reviewed on Jan 16, 2020

When my husband was with me during my appointments with Dr. Mountis, he was so impressed with her (as am I) that he is now her patient as well. She is GREAT!

Reviewed on Dec 5, 2019

Dr Mountis is the best.

Reviewed on Nov 20, 2019

Dr Mountis is very thorough in her checkups on my husband. She shows a caring concern in his well being. She goes over everything with us in detail.

Reviewed on Nov 7, 2019

excellent dr. the best

Reviewed on Oct 18, 2019

Dr. explained everything in terms I could understand.

Reviewed on Oct 18, 2019

Dr. Mountis is the best! She really listened to my concerns and seemed genuinely interested it what was going on with me. She treats me like an individual, not as a "diagnosis."

Reviewed on Oct 4, 2019

my appointment went well, as it always does. Dr Mountis and her staff are wonderful

Reviewed on Oct 3, 2019

Dr Montis was extremely articulate reviewing past test, examining me, explaining her thoughts and concerns. Addressing my wife ,daughter and my concerns. She even call with test results and her care plan on Saturday am because she knew we all worried . I can't express how impressed I am with the level of care from Cleveland Clinic ! Thank you

Reviewed on Oct 3, 2019

Again, I am so impressed with Dr. Montis. excellent Doc

Reviewed on Sep 20, 2019

I feel so Blessed to have Dr. Mountis as my cardiologist. As far as I am concerned she is the best out there. I was told last year I needed a heart transplant and for sure a pacemaker defibrillator. Dr. Mountis gave me hope. She was confident every time I saw her after 15 months my EF went from 22 to 38! My life has changed because of the care Dr. Mountis has provided me!

Reviewed on Sep 18, 2019

Dr. Mounts is a great Dr. She listens to everything I say and responds accordingly.

Reviewed on Sep 18, 2019

doctor and assistants excellent

Reviewed on Aug 5, 2019

had the most awesome visit with a doctor that I have ever had. she was patient,kind and understanding.

Reviewed on Aug 5, 2019

can't say enough about Dr. mountais and by that I mean good.

Reviewed on Jul 25, 2019

Dr Mountis is an incredible caring doctor

Reviewed on Jul 25, 2019

Loved Dr. Mountis. Did a great job explaining how I got to where I am & options.

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