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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).

Learn more about Dr. John Duncan:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. John Duncan is Excellent. Dr. Duncan has been reviewed by 4 patients who have provided 1 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. John Duncan, MD is board certified in Vascular Surgery and Thoracic Surgery (Cardiothoracic Vascular Surgery).

Education & Awards

Dr. Duncan graduated from Baylor College of Medicine, Houston.


Dr. Duncan has 2 hospital affiliations:

  • St Luke's Episcopal Hospital 
  • St. Luke's Episcopal Hospital (Texas Medical Center 


  • Spanish

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Additional Information
Dr. John Michael Duncan MD is a male Vascular Surgeon, has 41 years of experience and practices in Thoracic Surgery, Cardiothoracic Vascular Surgery, and Vascular Surgery.
Where does Dr. John M. Duncan practice?
Dr. John Duncan has 1 office location.
Dr. John Duncan practices Thoracic Surgery, Cardiothoracic Vascular Surgery, and Vascular Surgery near Houston, TX.
See Houston Cardiothoracic Surgeons and Houston Surgeons.