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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (4)

The overall average patient rating of Dr. John Duncan is Good. Dr. Duncan has been reviewed by 7 patients who have provided 4 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 4.2
Courteous Staff 4.2
Accurate Diagnosis 4.2
Bedside Manner 4.2
Spends Time with Me 4.2
Follows Up After Visit 4.2

Specialties & Research

Dr. John Duncan, MD is board certified in Internal Medicine and Cardiovascular Disease.

  • He has special expertise in 5 areas:
  • Acute Coronary Syndrome (ACS)
  • Heart Block
  • High Blood Pressure (Hypertension)
  • High Cholesterol (Hypercholesterolemia)
  • Unstable Angina

Education & Awards

Dr. Duncan graduated from University of Nebraska, Omaha.


Dr. Duncan has 14 hospital affiliations:

  • Baylor Heart And Vascular Center 
  • Medical Center Of Arlington 


  • Spanish
  • English

> > > > Dr. John Duncan, MD

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Additional Information
Dr. John Weinandt Duncan MD is a male Internist, has 33 years of experience and practices in Internal Medicine and Cardiovascular Disease.
Where does Dr. John W. Duncan practice?
Dr. John Duncan has 3 office locations.
Dr. John Duncan practices Internal Medicine and Cardiovascular Disease near Plano, TX.
Additional practice locations include: Dallas, TX.
See Plano Internists and Plano Cardiologists.