John M. Clark, DO

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Practice Philosophy

The role of the Lankenau Heart Group physician is one of both educator and healer, with the focus to treat each individual patient to improve longevity and quality of life. Not every patient needs to be treated in the same way, and our physicians take the patient’s preference into account when tailoring a personalized course of treatment for them. We believe it is key to listen to our patient and their family members to make sure they have a complete understanding of their cardiac illness as well as their treatment options. For the best possible outcome, it is valuable for both the patient and their family to have a voice in the patient’s care and be invested in their treatment plan.

This doctor is employed by Main Line HealthCare, the multispecialty physician network of Main Line Health, including more than 350 community and hospital-based physicians.

Locations and Appointments

Lankenau Heart Pavilion, Mezzanine Level
100 East Lancaster Avenue
Wynnewood, PA 19096
  • Phone: 484.476.1000
  • Fax: 484.476.9000
  • Accessibility: Public Transportation

Riddle Heath Center 2, Suite 2500
1088 West Baltimore Pike
Media, PA 19063
  • Phone: 484.227.8800
  • Fax: 484.227.2500
  • Accessibility: Public Transportation

Do you have questions or are you looking for help in choosing the right provider?

Call 1.866.CALL.MLH (1.866.225.5654), Monday through Friday between 8:00 am–6:00 pm ET, to speak with a member of our referral staff who can help find the doctor who is right for you.

About John M. Clark, DO

Dr. Clark specializes in evaluation and management of the diverse spectrum of adult patients presenting with heart failure, with a particular interest in right-sided heart failure and pulmonary hypertension. He also has special interest in:

  • Diagnosis of unexplained shortness of breath
  • Management of all FDA-approved durable left-ventricular assist devices (LVADS) and acute mechanical circulatory support
  • Evaluation and management of coronary artery disease, structural/valvular heart disease, cardiac arrhythmia, and all other major cardiac conditions
  • Evaluation and management of patients before and after heart transplant

He is a certified specialist in ECMO as well as a variety of cardiac imaging modalities, including adult echocardiography, cardiac computed tomography, and nuclear cardiology.

  • Years of Experience: 4
  • Language: English
Specialties Accepting New Patients
Heart Failure/Transplant Cardiology Board certified since 2018
Cardiovascular Disease Board certified since 2017
Genetics and Risk Assessment Board certified since 1
Primary Affiliation
Clinical Titles
  • Medical Director, Cardiovascular Genetics Services, Lankenau Medical Center


Medical school
  • Philadelphia College of Osteopathic Medicine
  • Lankenau Medical Center
  • Lankenau Medical Center
  • Temple University School of Medicine

*Members of the Main Line Health medical staff are affiliated with Bryn Mawr Hospital, Lankenau Medical Center, Paoli Hospital and Riddle Hospital. Membership on the medical staff of any of our hospitals does not constitute an employment or agency relationship.

Awards & Memberships

Current Membership & Activities
  • American College of Cardiology
  • Heart Failure Society of America

Patient Satisfaction Ratings and Comments