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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).

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Specialties & Research

Dr. Marten Duncan, DO is board certified in Gastroenterology.

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Duncan graduated from Western University of Health Sciences, Pomona.


Dr. Duncan has 4 hospital affiliations:

  • Shamokin Area Community Hospital 
  • Lewistown Hospital 

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Additional Information
Dr. Marten Boyd Duncan DO is a male Internist, has 13 years of experience and practices in Gastroenterology.
Where does Dr. Marten B. Duncan practice?
Dr. Marten Duncan has 5 office locations.
Dr. Marten Duncan practices Gastroenterology near Port Matilda, PA.
Additional practice locations include: Lewistown, PA and State College, PA.
See Port Matilda Gastroenterologists.