Donald J. McMahon, DO

Donald J. McMahon, DO
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4.94 out of 5 (102 ratings, 34 reviews)
Ratings and Reviews

Departments

Cooper University Health Care Titles

  • Gastroenterologist

Board Certifications

  • American Osteopathic Board of Internal Medicine (Gastroenterology)

Professional Type

Cooper Care Alliance

NPI

1285824839

About Me

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.

Office Locations

Turnersville
Cooper Care Alliance Gastroenterology at Turnersville

151 Fries Mill Road
Suite 401B
Turnersville , NJ 08012
Phone: 856.536.1515
Maps & Directions

Education & Training

Medical SchoolLake Erie College of Osteopathic Medicine, Erie, PA
InternshipInternal Medicine - Drexel University College of Medicine/Hahnemann University Hospital, Philadelphia, PA
ResidencyInternal Medicine - Drexel University College of Medicine/Hahnemann University Hospital, Philadelphia, PA
FellowshipGastroenterology - University of Medicine and Dentistry of New Jersey School of Medicine, Stratford NJ

Special Interests

Colorectal cancer screening, inflammatory bowel disease, biliary and liver diseases, hepatitis treatment

Memberships

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

Ratings and Reviews

Ratings and reviews come from patient responses to health care provider-related questions on the Clinician and Group Consumer Assessment of Healthcare Providers and Systems (CG-CAHPS) Patient Experience Survey that Cooper sends to patients after outpatient office visits.  Learn more about our survey and how ratings are calculated >>

Overall Rating

4.94 out of 5 (102 ratings, 34 reviews)
Jun 12, 2025
Great atmosphere and the doctor was very friendly
Jun 12, 2025
Yeah, Dr. McMahon and Dr. Mark Michelson, two of the greatest doctors I've ever met. I'm 72 years old, I see many. These two guys, I take the battle with me. I invite them to my next kid's birthday party. They're great guys, besides great human beings, they explain, they're truthful, and they kept me alive this far, that's why I love them. Have a blessed day, thank you.
Jun 12, 2025
Dr. McMahon and all his staff treated me very well. They took care of me, even helped me with my insurance, got everything added. They got me in right away. Explanation with Dr. McMahon was great. He gave me pathways to success to try to move forward with my current situation so that I can reach a better healing process. His skill and time in the, industry and healthcare was shown greatly and I feel as if I can call on him with any issues and be able to get an answer right away. It makes the situation for myself much easier to go through the process and I feel that I'm getting the best care.
Jun 12, 2025
Very friendly office. Dr. McMahon is very pleasant, easy to talk you and takes time to discuss issues with you. Have found my new Gastro Doc! !
Jun 12, 2025
Very nice and explained everything really good
Jun 12, 2025
This was a great, interactive visit.
May 12, 2025
Took his time to explain everything and if I have a problem with my my health to call the office
May 12, 2025
Thank you!
May 12, 2025
Dr McMahon was extremely informative and helpful explaining the procedure for my colonoscopy
May 12, 2025
It was wonderful. Everyone in this office was great. Highly recommend Dr. McMahon.