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Phone: 800-275-6401
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To schedule an appointment

Physicians call:1.800.332.8901
Patients call:1.800.275.6401

This physician sees patients at the following locations:

Gastroenterology Electric Ave Lewistown
310 Electric Ave Suite 100
Lewistown, PA 17044
Gastroenterology Gray's Woods State College
132 Abigail Lane
Port Matilda, PA 16870
Gastroenterology Moshannon Valley Philipsburg
210 Medical Center Dr
Philipsburg, PA 16866

Marten B Duncan, DO

Practicing Specialties:

  • Gastroenterology, Board Certified, 2004


  • College of Osteopathic Medicine of the Pacific 1998


  • Madigan Army Medical Center 2001


  • Walter Reed Army Medical Center 2004
  • U. of Maryland Medical Center 2005
    Hepatology and Endoscopic Ultrasound

Clinical Interests:

ERCP and diseases of the biliary tree
Evaluation of pancreatic diseases (cystic masses of the pancreas)
Endoscopic ultrasound (EUS) and fine needle aspiration (FNA)
Gastrointestinal stenting
Evaluation and management of autoimmnue hepatitis, hemochromatosis, PSC, PBC

Professional Memberships:

  • American College of Gastroenterology
  • American Society of Gastrointestional Endoscopy

Hospital Affiliations:

  • Geisinger Endoscopy Centre Lewistown
  • Geisinger Gray's Woods Outpatient Surgery
  • Geisinger Lewistown Hospital
  • Geisinger Medical Center
  • Geisinger Wyoming Valley Medical Center
  • OSW - GMC Outpatient Surgery - Woodbine
  • Same Day Surgery at SWB
  • Mount Nittany Medical Center