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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
  • 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 16 Treatment & Services +

Specialty in Diseases & Conditions

  • Amyloid Sarcoid Heart Disease
  • Amyloidosis
  • Cancer and the Heart
  • Cardiac Amyloid Imaging
  • 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 30 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 5/26/2023, 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

161 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
Patient Rating of Doctor 5

46 Patient Comments

Reviewed on Apr 19, 2023

Dr. Mountis is excellent

Reviewed on Apr 19, 2023

She is just such a nice, thoughtful, thorough person and physician. I cannot praise her enough.

Reviewed on Apr 18, 2023

I absolutely adore Dr Mountis. Her bedside manner is first rate and she always takes time to fully answer my questions.

Reviewed on Apr 10, 2023

Dr Mountis is excellent. She is thoughtful and thorough when reviewing tests with me, and I always learn something when I see her. I am a healthcare professional and cannot speak highly enough of the care and treatment she has provided me.

Reviewed on Mar 22, 2023

Dr. Mountis is always thorough and caring. She takes all the time I need and she shows genuine concern for me as a person.

Reviewed on Mar 22, 2023

I actually recommended Cleveland Clinic and Dr. Mountis to a patient who will be needing a heart transplant.

Reviewed on Mar 21, 2023

Dr Mountis is one of the BEST cardiologist that I have the honor to be seen by since battling heart failure (2009) the care I have received have given me back life that I thought I did not have left!

Reviewed on Mar 21, 2023

As a 20 year retired veteran I am so impressed with how the doctors there work as a team when it comes to my care, I absolutely love every one of them

Reviewed on Mar 15, 2023

Dr Mountis cared about what I had to say and she had formulated a plan to get my heart back on track

Reviewed on Mar 15, 2023

I owe Dr. Mountis everything she saved m life 5 years ago. I am so glad I made the decision to go to cleveland clinic. She goes far and beyond for her patients. I have been through alot of issues in the past 4 years. Dr. Mounts was there by my side every step of the way.

Reviewed on Mar 15, 2023

Dr. Mountis agreed to a video visit on short notice which I really appreciated.

Reviewed on Mar 15, 2023

Dr. Mountis conveys a great deal of care and concern for her patients whether through an online visit or in person.

Reviewed on Mar 15, 2023

I live a long distance from Cleveland so being able to have a video visit was reassuring and helpful. Dr. Mountis accommodated the need to talk with her in the most convenient way possible.

Reviewed on Feb 22, 2023

Dr. Mountis is an excellent physician. She greets you warmly, listens attentively, and uses her expertise in Cardiology to diagnose your problem and develop an appropriate plan of action. She goes above and beyond and is truly a caring professional!

Reviewed on Feb 15, 2023

Dr. Mountis was excellent. I am maintaining ongoing communication even though I have returned to my home in Michigan with referrals from Dr. Mountis.

Reviewed on Feb 13, 2023

Excellent doctor.

Reviewed on Jan 26, 2023

OMG Dr. Mountis is nothing short of great.

Reviewed on Jan 25, 2023

Absolutely loved Dr Mountis - very professional and caring

Reviewed on Jan 19, 2023

All doctors and nurses were very good. I especially noted the exceptional care given by CONNIE, ASHLEY & JO on Floor J73. If and when I return to Cleveland Clinic for hospitalization, I would hope to be assigned to these nurses

Reviewed on Jan 19, 2023

I have the BEST . Dr MOUNTIS IS THE best and is so knowledgable

Reviewed on Jan 10, 2023

Dr Mountis is extremely knowledgeable professional and competent I'd recommend here highly!

Reviewed on Dec 23, 2022

Dr. Mountis always makes me feel comfortable. I believe she is extremely knowledgeable and able to explain my case easily

Reviewed on Dec 16, 2022

Dr. Mountis was amazing!! Very helpful and genuinely cares about her patients and staff. Everyone before my appt. Told me she is great!! So happy and fortunate to be working with her.

Reviewed on Nov 30, 2022

Dr. Mountis is outstanding

Reviewed on Nov 28, 2022

Dr. Mountis and her office are very responsive to efforts to contact her, follow-up on orders she has placed, and in making appointments. Her staff are courteous, respectful, and competent. I greatly appreciate Dr. Mountis for the care she provides me because she is thorough, explains my health concerns, care, tests and test results, responds to all my questions, and is overall compassionate and empathetic. She takes time to listen to my concerns at each visit and fully explains her assessment. I appreciate the care she provides me.

Reviewed on Nov 28, 2022

Dr. Mountis is provides care of the highest quality and pays attention to my concerns. Dr. Mountis and her office are very responsive to efforts to contact her, follow-up on orders she has placed, and in making appointments. Her staff are courteous, respectful, and competent. I greatly appreciate Dr. Mountis for the care she provides me because she is thorough, explains my health concerns, care, tests and test results, responds to all my questions, and is overall compassionate and empathetic. She takes time to listen to my concerns at each visit and fully explains her assessment. I appreciate the care she provides me.

Reviewed on Nov 16, 2022

Dr.Mountis and her resident that she had with her very nice. Very concerned. Very compassionate. Great people. They explained everything to me. I understood it. I felt comfortable great

Reviewed on Nov 1, 2022

Dr. Mountis does everything excellently!

Reviewed on Oct 24, 2022

Dr Mountis is a great provider

Reviewed on Oct 13, 2022

Very pleased with Dr Mojntis and care from Cleveland Clinic

Reviewed on Oct 10, 2022

I wish that on a zoom appointment, the doctor could listen to my heart and lungs. She did question me intensively about how I am feeling, and any symptoms I am experiencing.

Reviewed on Sep 26, 2022

You could not ask for a better team of providers & care givers.

Reviewed on Aug 31, 2022

I would always recommend Dr. Mountis - she is a wonderful physician.

Reviewed on Aug 24, 2022

On two occasions including the last video appointment the video did not work. Fortunately, Dr. Mountis called my personal cell and completed the appointment.

Reviewed on Aug 24, 2022

Dr. Mountis is incredible. She listens and provides answers as needed. She is Excellent.

Reviewed on Aug 16, 2022

All my doctors were excellent!

Reviewed on Aug 12, 2022

I will only go to this heart Dr. And want her only involved in my care.

Reviewed on Aug 4, 2022

Kelly in Dr Mountis' office is AMAZING you are so very lucky to have someone like her representing Dr Mountis and the Cleveland Clinic!

Reviewed on Aug 4, 2022

Dr Mountis goes above and beyond any call of duty she is EXCEPTIONAL in every way we literally fly all the way to Cleveland Clinic BECAUSE OF HER WE LOVE HER and you are so lucky to have her!!!!!!!

Reviewed on Jul 13, 2022

She was excellentl

Reviewed on Jun 29, 2022

Dr. Mountis is the best. Kind, caring, compassionate and knowledgeable. A real gem.

Reviewed on Jun 24, 2022

Great Dr.

Reviewed on May 16, 2022

Although I had some issues connecting with Dr. Mountis, it was on my end and my computer causing the issue. We got it fixed though and appreciated her patience with me as our appointment was several minutes delayed.

Reviewed on May 16, 2022

Dr. Maria Mountis is a very caring and exceptional doctor. I'm so glad I have her as my heart doctor.

Reviewed on May 16, 2022

Dr Mountis is the best

Reviewed on May 16, 2022

Doctor Mountis is extremely engaged in treatment protocol and explanation to patient.

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