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Department Thoracic and Cardiovascular Surgery
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon Yes
Locations Specialties & Treatments

Treatment & Services

  • Adult Cardiothoracic Surgery
  • Aortic Valve Repair
  • Aortic Valve Replacement
  • Aortic Valve Surgery
  • Cardiovascular Surgery Department
  • Carotid Artery Stenosis
  • Coronary Artery Bypass Graft (cabg) Surgery
  • ECMO (Extracorporeal Membrane Oxygenation)
  • Heart Surgery
  • Heart Valve Surgery
  • Lung Surgery
  • Lung Transplant
  • Lung Transplantation
  • TAVR
  • Thoracic and Cardiovascular Surgery Section
  • Tricuspid Valve Insufficiency
  • Tricuspid Valve Repair
  • Tricuspid Valve Replacement
  • Tricuspid Valve Surgery
  • Valve Surgery
View all 20 Treatment & Services +

Specialty in Diseases & Conditions

  • Acquired Adult Cardiac Disease
  • Acquired Valve Disease
  • Aorta Disease
  • Aortic Insufficiency
  • Aortic Regurgitation
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Cardiovascular Disease
  • Carotid Artery Stenosis
  • Coronary Artery Disease
  • Lungs
  • Tricuspid Regurgitation
  • Tricuspid Valve Disease
  • Valve Disease
View all 15 Specialties +


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About James Yun, MD

James J. Yun, M.D., Ph.D. is a staff cardiac surgeon in the Department of Thoracic and Cardiovascular Surgery in the Sydell and Arnold Miller Family Heart, Vascular & Thoracic Institute.

Special Interests:  Cardiothoracic transplantation, adult cardiac surgery, extracorporeal membrane oxygenation (ECMO) therapy, cardiothoracic surgical education, interdisciplinary teamwork.

Number of Procedures Performed: Cleveland Clinic performs more than 4,000 heart surgeries each year. All Cleveland Clinic cardiac surgeons complete between 300-400 cardiac cases per year. 

Success rates: Among top U.S. hospitals for cardiac surgery, Cleveland Clinic’s volume is the highest with the best quality outcomes. You can view success rates for specific procedures at

Education and Training: Dr. Yun earned his undergraduate degree from Harvard University and his medical degree from Yale University School of Medicine.  He trained in general surgery at Yale-New Haven Hospital and Brigham & Women’s Hospital, then completed cardiothoracic surgery fellowship at Stanford University Hospital as well as advanced cardiac surgery and cardiothoracic transplant fellowship at Cleveland Clinic. 

During his general surgery training, he also earned a PhD in Experimental Pathology from the University of California, Los Angeles. 

Leisure Activities:  In his leisure time, Dr. Yun enjoys classical music and spending time with his family and fiancé.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - Cleveland Clinic
Cardiac Surgery
Cleveland, OH USA

Fellowship - Stanford University Hospital
Cardiothoracic Surgery
Stanford, CA USA

Residency - Brigham & Women's Hospital
General Surgery
Boston, MA USA

Residency - Yale-New Haven Hospital
General Surgery
New Haven, CT USA

Graduate School - University of California Los Angeles
Experimental Pathology
Los Angeles, CA USA

Medical Education - Yale University School of Medicine
New Haven, CT USA

Undergraduate - Harvard University
Cambridge, MA USA


  • Thoracic Surgery - Thoracic and Cardiac Surgery

Specialty Interests

Cardiothoracic transplantation, adult cardiac surgery, extracorporeal membrane oxygenation (ECMO) therapy, cardiothoracic surgical education, interdisciplinary teamwork.

Research & Publications

Research & Publications

See publications for James Yun, 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 5/6/2021, Dr. Yun 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

41 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

8 Patient Comments

Reviewed on Oct 7, 2021

*Dr. Yun & staff were the best!

Reviewed on Jul 23, 2021

Dr. Yeun is very professional and considerate. The tech/access of My Chart communication has been improved.

Reviewed on Jul 23, 2021

All 5 Best, Dr. Yuen!

Reviewed on Jun 10, 2021

*Dr. Yun followed Tom's care through the entire stay and worked with all dept. physicians.

Reviewed on Jun 7, 2021

Very pleased with the operation of Cleveland Clinic. We are happy to have chosen this clinic for our needs. Dr Yun thank you for your caring and knowledge.

Reviewed on May 21, 2021

Dr. Yun is the most amazing surgeon and person at the Cleveland Clinic. I have never been involved with a CCF Dr. that has shown such genuine care and concern for my health issues post surgery than this man. I can't say enough about how great he is.

Reviewed on Feb 19, 2021

Dr. Yun. Cant say enough great things about him.

Reviewed on Jan 25, 2021

Dr Yun was very attentive and showed genuine interest in me and my wife and answered all our questions. had a great attitude and personality. Happy it will be Dr Yun doing the valve replacement surgery.

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