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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 Amyloid Imaging
  • Cardiac Transplant
  • Cardiology
  • Cardiovascular Medicine
  • Cardiovascular Medicine Department
  • Endomyocardial Biopsy
  • George M and Linda H Kaufman Center for Heart Failure
  • Heart Biopsy
  • Heart Failure Management
  • Heart Failure Section
  • Heart Failure Surgery
  • Heart Transplant
  • Mechanical Assist Devices
  • Mechanical Circulatory Support
  • Pre-Transplant Evaluation
  • Ventricular Assist Device
View all 16 Treatment & Services +

Specialty in Diseases & Conditions

  • Amyloid Sarcoid Heart Disease
  • Amyloidosis
  • Cancer and Heart Disease
  • 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 and Pregnancy
  • Heart Disease in Women
  • Heart Failure
  • Heart Failure in Women
  • Hypertrophic Cardiomyopathy
  • Infiltrative Cardiomyopathy
  • Ischemic Cardiomyopathy
  • Myocarditis
  • Nonischemic Cardiomyopathy
  • Pulmonary Hypertension
  • Restrictive Cardiomyopathy
  • Sarcoid Heart Disease
  • Shortness of Breath
View all 28 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 is nationally and internationally renowned for the world’s best cardiovascular care. Success rates for specific procedures are available at: https://my.clevelandclinic.org/departments/heart/about/outcomes-stats

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 4/4/2024, Dr. Mountis 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

212 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 4.9
Patient Rating of Doctor 4.9

51 Patient Comments

Reviewed on May 1, 2024

Dr. Mountis is the best she saved my life.

Reviewed on Apr 29, 2024

The ability to speak with my provider in clear zoom technology is a definate advantage when my home is in Sarasota Fl.

Reviewed on Apr 12, 2024

My number 1 doctor...Dr Mountis

Reviewed on Apr 12, 2024

Dr Mountis treats my heart-AND- the PERSON. Looking at a holistic view of connected causes and symptoms to relieve or alleviate non-heart specific related issues. Could not be happier with both the Dr as well as the "system" and most importantly the administration and staff constancy and concern for EFFICIENCY.

Reviewed on Mar 18, 2024

You should have an excellent rating available cause Dr Mountis is excellent

Reviewed on Mar 18, 2024

Dr Mountis is the best

Reviewed on Mar 18, 2024

Dr. Mountis is fabulous! She takes time to explain things very well. She also shows concern for me as a person.

Reviewed on Feb 15, 2024

After seeing 4 other cardiologists I am so grateful to have only Dr. Mountis.

Reviewed on Feb 15, 2024

Love this Dr and her staff!!!

Reviewed on Feb 14, 2024

I'd recommend her in a heartbeat. The doc she spoke to while I was in the hospital really liked her too.

Reviewed on Jan 8, 2024

Dr Mountis is the BEST

Reviewed on Dec 21, 2023

Dr. Mountis is a very courteous, considerate, and conscientious doctor. She is thorough and has improved my life considerably in the past 3 years.

Reviewed on Dec 21, 2023

Dr Mountis is very knowledgeable, kind and compassionate. She has helped me more than I can say, through some very difficult cardiac situations.

Reviewed on Dec 18, 2023

Dr. Mountis is a caring, brilliant cardiologist. She looks at the person as a whole and treats accordingly. She's the best!

Reviewed on Dec 18, 2023

Care provider is very caring.

Reviewed on Dec 8, 2023

Exceptional experience working with Dr. Mountis!

Reviewed on Dec 7, 2023

I have been fortunate to have Dr Mountis throughout my health journey. I have absolute confidence in Dr Mountis and expect to maintain my doctor/patient relationship without an end date.

Reviewed on Dec 6, 2023

Dr Mountis even gave me questions to ask my Dr about a procedure I'm going to have

Reviewed on Dec 6, 2023

Dr Mountis was excellent at all the details & my medications

Reviewed on Nov 29, 2023

If I could Dr. Mountis a "10" I would! So very kind and compassionate. Never in a hurry and answers all questions.

Reviewed on Nov 22, 2023

We respect Dr. Mountis and appreciate all that she has done for me.

Reviewed on Nov 10, 2023

Dr Maria Mountis is absolutely one of the best, if not the best!!!!!!

Reviewed on Oct 30, 2023

Dr. Mountis was excellent in all respects.

Reviewed on Oct 30, 2023

Physicians, nurses, and aides interaction was professional and seamless.

Reviewed on Oct 18, 2023

Dr. Mountis is awesome in all ways. She even paused for a few minutes, to step out and discuss a particular concern with Dr. Hanna while I was there. I traveled from Florida to make this appointment.

Reviewed on Oct 18, 2023

Dr. Mountus was fantastic, listened and cared about my issues and helped to come up with a solution, I would highly recommend her!

Reviewed on Oct 17, 2023

Dr. Mountis is great

Reviewed on Oct 16, 2023

Dr Mountis was very thorough, thoughtful and professional at the appointment. I am very appreciative to have her as my doctor. Wouldn't change a thing. Please give her a large raise and more time off. Thanks.

Reviewed on Oct 5, 2023

I am very pleased with Dr. Mountis's care and professionalism.

Reviewed on Oct 4, 2023

Dr Mountis is very personable and knowledgeable. She is one of my favorite Drs ever!

Reviewed on Oct 4, 2023

We are grateful for Dr. Mountis for so many reasons. She really helped us with scheduling and getting a procedure done during our visit - since we travel 7 hours to be there it was so appreciated! She really takes the time with her patients and explains things so perfectly. Amazing human!

Reviewed on Sep 27, 2023

Dr. Maria is nice, caring and a delightful person. She listens, she is thorough and explains so that I understand what is going on iwith my heart.

Reviewed on Sep 25, 2023

Dr. Mountis is such a kind person. She's good at what she does and you can tell she's passionate about her job. I see her once a year for follow ups. I feel as though I'm going to visit a friend. She's one of the most kind, yet professional doctors I've ever had the pleasure of dealing with. I have always felt that I'm receiving the best care for my health situation.

Reviewed on Sep 20, 2023

I truly feel on a scale of 1 thru 10. Dr. Maria Mountis is a 10. A perfect score when it comes to her profession as a Cardiology Doctor. I always feel confident with her opinion on heart health.

Reviewed on Sep 8, 2023

Dr Mountis is phenomenal. She took the time to go over everything with me and answer all my questions.

Reviewed on Aug 22, 2023

Dr. Mountis. Is very caring,covers all problems, does an outstanding job of her medical visit with you.

Reviewed on Aug 22, 2023

Dr.Mountis is very kind, caring and understanding of patients needs

Reviewed on Aug 7, 2023

Excellent support all the way!So pleased she's my doctor. We recommend her to others.

Reviewed on Jul 28, 2023

Dr. Mountis showed care and concern for me and my issues.

Reviewed on Jul 27, 2023

Dr Mountis is incredible. I feel fortunate to be under her care and truly value her opinion. She is very professional and caring. A true asset to your organization.

Reviewed on Jul 25, 2023

Maria Mountis is the most knowledgeable heart failure Dr that I know.

Reviewed on Jul 25, 2023

If there was a 10 Dr Mountis would get that from me. She is just a wonderful person and a compassionate doctor. Simply the best.

Reviewed on Jun 28, 2023

Dr. Maria Mountis is a wonderful doctor.

Reviewed on Jun 26, 2023

I feel extremely fortunate to have Dr. Mountis as my cardiologist.

Reviewed on Jun 8, 2023

Dr Mountis is the best!!!!!!! When Dr Rincon was retired out I was worried. Mountis is just as great but with a better personality.!!!!

Reviewed on Jun 5, 2023

I have recommended Dr Mountis to a friend for her husband's care

Reviewed on Jun 1, 2023

Dr.Mountis is DEFINITELY THE BEST Dr in the nation!!!

Reviewed on Jun 1, 2023

Dr. Mountis is very comforting and provides a safe space for me to discuss all my concerns. I am probably more comfortable with her than I have been with a Dr. In years. I always feel better about my heart care when I see her.

Reviewed on Jun 1, 2023

Dr. Mountis is so knowledgeable and always comprehends the big picture. She identified a problem result in one of my blood tests. Rather than panic (which was my reaction), she put in an order to retest it. When that result came back questionable, she replied immediately that all was ok. What an awesome doctor. She is the best of the best.

Reviewed on Jun 1, 2023

Dr. Mountis is excellent!

Reviewed on May 19, 2023

Dr Mountis is fantastic . She is very caring, listens and explains. She takes time with you and you never feel rushed

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