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Providers / John W Duncan, MD

Dr. John Duncan

John W Duncan, MD

Board-Certified Cardiologist

John Duncan, MD, is board-certified in cardiovascular disease, nuclear cardiology, and internal medicine, and specializes in general and nuclear cardiology and vascular medicine. He practices at HeartPlace in Plano, Texas, providing patients with the highest quality of care.

Dr. Duncan received his medical degree at the University of Nebraska Medical School in Lincoln, Nebraska. He then completed his internship in internal medicine at East Tennessee State University and continued his training with a residency in internal medicine at Good Samaritan Medical Center.

Dr. Duncan holds affiliations with multiple hospitals, including Baylor Scott & White Medical Center Plano and Medical City Plano, both in North Texas.

With more than 30 years of service, Dr. Duncan has been recognized as one of D Magazine's Best Doctors in Collin County, Texas, and he has been featured in the media for his expertise and extensive experience in cardiovascular disease.

He offers his patients genuine dedication, giving them excellent support and guidance to maintain a healthy life.



  • Cardiovascular Disease
  • Nuclear Cardiology
  • Internal Medicine


  • Baylor Scott & White Medical Center Plano
  • Baylor Scott & White | The Heart Hospital Plano
  • Medical City Frisco
  • Medical City Plano
  • Methodist Richardson Medical Center
  • Texas Health Plano


  • Fellowship, Cardiology: Good Samaritan Medical Center​ 
  • Residency, Internal Medicine: Good Samaritan Medical Center​ 
  • Internship, Internal Medicine: East Tennessee State University​ 
  • Medical School, MD Degree: University of Nebraska Medical School, Lincoln, NE




Find John Duncan, MD at the following locations