Donald J. McMahon, DO

Jefferson Health Provider

Jefferson Medical Group Jefferson Medical Group

Practice Information

Washington Township Gastroenterology
151 Fries Mill Road
Suite 301
Turnersville, NJ 08012
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Direct Phone: 215-955-8900

Office Hours:

Mon: 8am - 12/4:30pm (WT)
Tues: 8am - 12pm (WT)
Tues: 1 - 4:30pm (WD)
Thurs: 8am - 12pm (WT)

Specialty: Gastroenterology
Focus Area:
Gender: Male
Languages: English, French

Online Appointment Scheduling

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Background & Education

Medical School: Lake Erie College of Osteopathic Medicine
Internship: Hahnemann University Hospital (MCP/Drexel)
Residency: Hahnemann University Hospital (MCP/Drexel)
Fellowship: Kennedy Health System

Professional Appointments & Affiliations

Appointments & Affiliations:

  • Gastroenterologist, Jefferson Health – Washington Twp & West Deptford, NJ (2016-Present)
  • Assistant Professor, Rowan University School of Osteopathic Medicine, Department of Medicine/Gastroenterology – Stratford, NJ (2010-Present)
  • Medical Director - Division of Gastroenterology, Jefferson Health
  • Chief of Gastroenterology - Jefferson Health
  • Program Director for Gastroenterology Fellowship, RowanSOM


  • American College of Gastroenterology
  • American Gastroenterology Association
  • American Osteopathic Association
  • Crohn’s and Colitis Foundation of America


Dr. McMahon provides comprehensive diagnosis and treatment for all gastrointestinal complaints and diseases. His special interests include: colorectal cancer screening, inflammatory bowel disease, biliary and liver diseases and hepatitis treatment.

Ages served: 18+