Browse Health
Surgical Specialist
25 years of experience
Accepting new patients
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 (2)

The overall average patient rating of Dr. Mark Duncan is Excellent. Dr. Duncan has been reviewed by 5 patients who have provided 2 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 4.6
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Mark Duncan, MD is board certified in Surgery.

  • He has special expertise in 9 areas:
  • Adrenal Gland Cancer
  • Colon Cancer
  • Colorectal Cancer
  • Esophagus Cancer (Esophogeal Neoplasm)
  • Gallbladder Cancer
  • Intestinal Cancer
  • Pancreatic Cancer
  • Soft Tissue Cancer (Sarcoma)
  • Stomach Cancer

Education & Awards

Dr. Duncan graduated from Mayo Medical School, Rochester. He has 3 awards.

Castle Connolly America's Top Doctors® (2009, 2012 - 2015)
Castle Connolly America's Top Doctors® for Cancer (2009, 2012, 2014 - 2015)
Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. Duncan has 5 hospital affiliations:

  • The Johns Hopkins Hospital 
  • Johns Hopkins Bayview Medical Center 


  • English

> > > > Dr. Mark Duncan, MD

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Additional Information
Dr. Mark Douglas Duncan MD is a male Surgeon, has 25 years of experience and practices in Surgery.
Where does Dr. Mark D. Duncan practice?
Dr. Mark Duncan has 1 office location.
Dr. Mark Duncan practices Surgery near Baltimore, MD.
See Baltimore Surgeons.