
Highlights
Age Groups Seen
- Adult 18-65
- Older Adult 65+
Languages
- English
Gender
MaleAffiliations
- Cooper University Hospital
About Donald J McMahon
Professional Statement
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.
Title
Gastroenterologist
Professional Memberships
Practice Group :
Cooper Care Alliance
Locations
- 151 Fries Mills Road, Suite 401-b, Turnersville, NJ 08012
- Get Directions
- phone: 856-536-1515
- fax: 856-412-5361
Clinical Interests
Colorectal cancer screening, inflammatory bowel disease, biliary and liver diseases, hepatitis treatmentEducation and Training
Education
- Fellowship: RowanSOM/OPTI/Jefferson Health/Virtua OLOL, Gastroenterology, 2010
- Internship/Residency: Drexel University College of Medicine / Hahnemann University Hospital, Internal Medicine, 2007
- Medical School: Lake Erie College of Osteopathic Medicine, 2004
Board Certifications
- Gastroenterology: American Osteopathic Board of Internal Medicine, 2011
Insurance
- Aetna Better Health Medicaid HMO
- Aetna First Health (Coventry)
- Aetna HMO/PPO/POS
- Aetna Medicare
- Aetna Quality Health
- Aetna Whole Health
- AmeriHealth HMO/PPO/POS
- AmeriHealth Medicare
- AmeriHealth Value Network
- Braven Health Medicare
- Cigna Evernorth Behavioral Health
- Cigna HMO/PPO/POS
- Cigna Medicare
- Cigna One Health
- Clover Health Medicare PPO
- Fidelis Care Medicaid HMO
- First MCO Group Health
- Galaxy Health Network Group Health
- Guardian
- Horizon Blue Cross Blue Shield of New Jersey HMO/PPO
- Horizon Blue Cross Blue Shield of New Jersey Omnia
- Horizon Blue Cross Blue Shield of New Jersey State Benefit Plans
- Horizon NJ Health Medicaid HMO
- Horizon NJ Health NJ Family Kidcare
- Humana Medicare Advantage Medicare HMO
- Humana Medicare Advantage Medicare PPO
- Humana Military Prime
- Humana Military Standard
- Humana Military TriCare
- Independence Blue Cross IBC PPO
- Independence Blue Cross Keystone Healthplan East
- Independence Blue Cross Medicare
- Independence Blue Cross Personal Choice
- Jefferson Health Plans Medicare HMO
- Jefferson Health Plans Medicare PPO
- Longevity Health Plan Medicare PPO I-SNP
- Magellan Behavioral Health
- MagnaCare Group Health
- Medicaid (NJ)
- Medicare
- MultiPlan PHCS
- Prime Health Services Group Health
- QualCare Emblem Health
- QualCare HMO/PPO
- Railroad Medicare
- Three Rivers Contigo
- Three Rivers Devon
- United Behavioral Health Group Health
- United Behavioral Health Medicaid
- United Behavioral Health Medicare
- United Behavioral Health Optum
- United Healthcare AARP
- United Healthcare Community Plan Medicaid HMO
- United Healthcare Community Plan NJ Family Kidcare
- United Healthcare Dual Complete D-SNP
- United Healthcare Group Health
- United Healthcare Medicaid
- United Healthcare Medicare
- United Healthcare Medicare Advantage
- US Family Health Plan
- VA Community Care Network
- WellCare Medicare
- Wellpoint Medicaid HMO
- Wellpoint Medicare
Ratings & Reviews
4.9 out of 5
322 ratings, 123 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- Reviewed on 5/30/2026
Doctor and staff were great.
- Reviewed on 5/28/2026
Dr. McMahon was a pleasure to see. He was professional, empathetic and thorough. I never felt rushed and all of my concerns were answered. I would recommend him to anyone.
- Reviewed on 5/25/2026
Always a pleasure seeing the staff and Dr.Lowe. He's thoughtful, thorough, and very friendly . Kudos to the medical and office staff. As a physician myself, having run my practice for decades, I can happily rate the practice A+++.
- Reviewed on 5/22/2026
He's a great doctor and a great guy.
- Reviewed on 5/22/2026
Dr. McMahon was terrific. He explained everything about my issues and was so helpful in talking through some other issues I have. He made me feel heard & like he was actually concerned with my well being.
- Reviewed on 5/21/2026
Dr. McMahon was fabulous. He made me feel very comfortable and he was extremely knowledgable. He gave me a few options for my care and left me with decisions that were very easy to make. He helped me to understand my situation and was willing to answer any other questions that I may have. I would recommend him to everyone. I would love all my family members to go to him if they ever had a problem.
- Reviewed on 5/21/2026
Dr McMahon and his entire staff are the best. Period.End of story. I was treated as a family member. All questions were answered. Expectation of procedures laid out and built around my timetable.couldn't ask for more!
- Reviewed on 5/20/2026
Thank you for making me feel comfortable in an uncomfortable situation. You have a great bedside manner.
- Reviewed on 5/15/2026
Dr. McMahon took the time to have a conversation about what I was experiencing with my symptoms and offered ways to alleviate my discomfort. He was extremely easy to speak with and was a very active listener. I appreciate his time and will refer any family members or friends that need care. It was a great experience overall.
- Reviewed on 5/15/2026
Dr explained everything clearly and put my mind at ease.
- Reviewed on 5/11/2026
Dr McMahon is excellent, knowledgeable.
- Reviewed on 5/8/2026
Dr. McMahon and his staff were awesome! Always make the uncomfortable visit comfortable. The best!
- Reviewed on 5/7/2026
Very professional knowledgeable, but still have to go through the procedure all in all great doctor
- Reviewed on 5/2/2026
The dr. Was amazing. Definitely made me comfortable
- Reviewed on 5/1/2026
Very friendly and professional office.Dr. McMahon great doctor.
- Reviewed on 4/29/2026
Very friendly and compassionate atmosphere
- Reviewed on 4/28/2026
Dr was friendly, professional and discussed my condition in an understandable manner.
- Reviewed on 4/25/2026
I had an excellent visit. I would highly and have already highly recommended the physician that I saw. There was nothing negative about anything from the time I walked in until the time I left. Thank you.
- Reviewed on 4/23/2026
I thought the doctor was great! Very friendly and he explained things very well. my wife was on the phone with us so she could ask some questions and now she is going to make him her main Gastro doctor.
- Reviewed on 4/23/2026
Dr. McMahon speaks to you in a way that makes you understand your issues and feel very comfortable about asking questions. He is professional and courteous . He is a great doctor and I can say that from experience. I highly recommend him.
- Reviewed on 4/19/2026
My doctor had a great personality and took time to discuss my medical history and the upcoming procedure.
- Reviewed on 4/19/2026
Wonderful doctor and staff. Listened to all my concerns and provided answers and options.
- Reviewed on 4/18/2026
Dr McMahon took his time explaining everything in detail and answered any concerns I may have had. His staff is very friendly and professional.
- Reviewed on 4/17/2026
It's been great
- Reviewed on 4/17/2026
Dr. was very personable and easy to talk to, and explained everything I needed to do thoroughly, Great communication skills and very knowledgeable offering sustainable solutions.
- Reviewed on 4/16/2026
All of the staff are professional, personable and efficient. They go above and beyond to make you comfortable and treat you with dignity which to me is extremely important.
- Reviewed on 4/15/2026
Place is very clean. People are very friendly
- Reviewed on 4/15/2026
The doctor was very nice and explained everything and was easy to understand and talk to.
- Reviewed on 4/9/2026
He was nice and friendly caring made me feel comfortable while explaining things to me very well kept space all staff was nice and respectful
- Reviewed on 4/8/2026
Been seeing Dr for many years! Always listens to my problems and answers questions so I can understand! He is very knowledgeable and also friendly! Great Dr
- Reviewed on 3/26/2026
Dr. McMahon took the time to listen to all my concerns about me and not once did I feel he was rushing me to get to his next appointment. I would definitely recommend him to anyone looking for a Gastroenterology that take his time and listen to his patients.
- Reviewed on 3/21/2026
I really like him. He explained everything to the point that I understood and answered all my questions. I like the the way his office is run it doesn't feel like a factory
- Reviewed on 3/19/2026
I was extremely pleased with Dr. McMahon! He put my mind at ease, explaining everything about the problems I've been having. I felt so much genuine care and compassion as he diagnosed and answered all of my questions. His staff was very kind and professional as well. I would highly recommend Dr. McMahon to anyone who was in need of a GI doctor.
- Reviewed on 3/18/2026
I felt the Dr had a true concern about my health.
- Reviewed on 3/18/2026
Everyone was very nice and the Dr was super helpful!
- Reviewed on 3/11/2026
The Doctor was very friendly and he made sure I understood what we were talking about.
- Reviewed on 3/7/2026
He is one of the best GI doctors in south jersey
- Reviewed on 3/7/2026
Very grateful for the compassionate and exceptional care, understanding, and communication from Dr. McMahon and his entire staff. Thank you.
- Reviewed on 3/5/2026
Dr McMahon is very thorough and easy to talk to.
- Reviewed on 2/28/2026
Dr. McMahon seems nice, competent, easy to talk with. The visit was most satisfactory
- Reviewed on 2/22/2026
Everyone was so nice and made me feel like I was a person not just a number
- Reviewed on 2/16/2026
I received great customer service.
- Reviewed on 2/11/2026
Everyone from reception were very professional. Had a Blood test done. Dr Solarno called with test results, say white Blood count was high.
- Reviewed on 2/11/2026
Dr was easy to talk to and he explained things well. Receptionist was very friendly and helpful. Overall it was a good experience
- Reviewed on 2/6/2026
So there was nothing they could do to improve it. He was thorough, patient, took his time, was very empathetic and thorough. So I highly recommend him and it was my first time there.
- Reviewed on 2/5/2026
The staff and doctor were very nice and welcoming.
- Reviewed on 2/5/2026
Dr. McMahon was thorough and explained things were I can understand. His medical manners were excellent.
- Reviewed on 2/1/2026
Dr McMahon was very down to earth and even answered some questions regarding other fields of medicine that I had concerns about. He is very thorough! I've already recommended this office and him specifically! Thanks!
- Reviewed on 1/31/2026
Both Dr. McMahon and the staff was great
- Reviewed on 1/29/2026
I really enjoyed meeting Dr. McMahon and his staff, they were extremely nice and helpful. I appreciated the thorough and thoughtful way that Dr. McMahon discussed my issue with me, and how he outlined the treatment plan for me, making sure he answered every one of my questions. Excellent doctor!
- Reviewed on 1/28/2026
Everyone was very professional and made be feel comfortable and informed.
- Reviewed on 1/21/2026
Doctor listened and didn't rush me. He was very informative and kind.
- Reviewed on 1/15/2026
All the staff and the doctor were professional, competent and attentive to my needs. A great experience! Thank you.
- Reviewed on 1/15/2026
Dr. McMahon is by far the best gastroenterologist I have seen of the 5 I dealt with over the years. Dr. McMahon is one of the top medical professionals I have ever met in my entire 71 years of life. I have full confidence in his expertise and he is outstandingly thorough and caring. You can't ask for more.
- Reviewed on 1/11/2026
Time was excellent. Doctor and staff were all outstanding...All.were very efficent and very professional and helpful.
- Reviewed on 1/9/2026
Dr. McMahon made me feel so much better just by talking to me. I was really worried about what my kidney MRI said about my liver.
- Reviewed on 12/20/2025
Wonderful doctor and staff...glad I found this medical group!
- Reviewed on 12/19/2025
All personnel at Dr McMahon's practice, executed their respective duties with a high degree of professionalism and efficiency.
- Reviewed on 12/9/2025
Dr McMahon is great Dr always explains everything in detail and answers any questions I have
- Reviewed on 12/9/2025
All around amazing doctor with great staff.
- Reviewed on 12/7/2025
Dr. McMahon was very professional, patient conversationist. He asked me how did I feel what was my main concerns? We had a conversation about being a diabetic. He was very understanding very polite and I enjoy talking to him. He also informed me that if I ever needed anything to, please let him know and he would do whatever he can do to help so. I had a very good visit and I would go back there again. He also scheduled me for my colonoscopy and told me what to expect. He's very good at what he does and also talking to people.
- Reviewed on 12/6/2025
Very nice and explained everything really good
- Reviewed on 12/6/2025
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! !
- Reviewed on 12/4/2025
Dr McMahon explained things to me in a way that was easy to understand. He was friendly and easy to speak to. I have no concerns about this procedure now. My wife went to him a couple months ago and also had a great experience.
- Reviewed on 12/3/2025
Great Doctor
- Reviewed on 11/27/2025
They were great professional and really guided me through what I needed to know about my colonoscopy
- Reviewed on 11/26/2025
I was very pleased with this doctor and his staff
- Reviewed on 11/26/2025
Great experience everything was Great
- Reviewed on 11/14/2025
Dr. McMahon explained everything about the colonoscopy and frequency/reasons for frequency, also recent medical problem (not GI-related). He was very friendly and explained things very thoroughly. Would highly recommend.
- Reviewed on 11/13/2025
Provider explained everything thoroughly and answered all my questions. Very patient
- Reviewed on 11/5/2025
Dr.McMahon was excellent. He was very thorough and proactive in my visit. I'm very pleased.
- Reviewed on 11/5/2025
Hopping that the meds work. Having trouble swolling them.
- Reviewed on 11/5/2025
Great experience! Would definitely recommend!
- Reviewed on 10/30/2025
The Dr is definitely one of the best and I been seeing him for a long time.
- Reviewed on 10/30/2025
It was a wonderful experience. The doctor listened and was very helpful explaining the plans for my continued care.
- Reviewed on 10/25/2025
Everyone made me feel quite comfortable and I feel trust for my physician. It is good walking out of your doctor's office feeling like you can trust him.
- Reviewed on 10/16/2025
Dr McMahon is extremely personable, has great "bedside Manners" and explains everything in simple terms. I look forward to developing the doctor patient relationship with Dr McMahon.
- Reviewed on 10/16/2025
Doctor was absolutely wonderful explained everything I understood what he said and the explanation was so simple I was like wow I really like this guy definitely one of my new doctors to go to if needed...
- Reviewed on 10/15/2025
Dr. McMahon was very kind and took the time to allay my fears. His positivity and humor really helped me calm my nerves:-)
- Reviewed on 10/10/2025
Very knowledgeable. Put you at ease
- Reviewed on 10/10/2025
The doctor was very nice, knowledgeable, and helpful, and the office was very, very good from top to bottom.
- Reviewed on 10/2/2025
The Dr and his staff were very courteous and knowledgeable
- Reviewed on 9/18/2025
It was the first time I met this specialist and he made me feel totally comfortable!
- Reviewed on 9/17/2025
Dr McMahon has excellent ways of explain how things and is an excellent doctor! He is very personable and easy to discuss your concerns with.
- Reviewed on 9/10/2025
Dr. McMahon treated as if I was his own family member. Very pleasant, understanding, and easy to communicate with.
- Reviewed on 9/9/2025
Dr McMahon is a very friendly, smart and cares about how I was doing. He takes a very good amount of time with me and explains everything so I can understand what's going on. He's the best!
- Reviewed on 9/7/2025
Dr. Donald McMahon & his staff are exemplary medical professionals. From the first moment I arrived & checked-in to my check-out, I was very impressed by everyone's professionalism & courtesy. They all made me - and the other patients - feel comfortable and at ease. Dr. McMahon was so easy to talk to and provided excellent advice - his medical expertise is very much appreciated. He and his staff emphasized that they are always available to answer any questions I might have and address any concerns related to my health. It was a very positive experience and a model for all medical offices!
- Reviewed on 9/7/2025
It was a very pleasant experience
- Reviewed on 9/5/2025
Very professional ! !
- Reviewed on 9/3/2025
Loved Dr Mahon He eased my mind !
- Reviewed on 8/27/2025
Don is absolutely fabulous. Explained all and made me feel right at home.
- Reviewed on 8/27/2025
Cooper always goes above And beyond.. great staff all around
- Reviewed on 8/27/2025
Dr. McMahon was awesome, I have already recommended him to friends and family.
- Reviewed on 8/26/2025
It took a very long time to get an appt with Dr. McMahon but he was great. I would def return.
- Reviewed on 8/20/2025
He was my doctor when he was at Jefferson Health, I trust and like him enough to have followed him to Cooper.
- Reviewed on 8/17/2025
Excellent work experience dealing with a very intimate and difficult issue. Only missing piece was seeing a summary on mychart post visit.
- Reviewed on 8/13/2025
Dr. McMahon was very easy to talk to and explained everything very thoroughly.
- Reviewed on 8/10/2025
The whole staff were terrific. Dr was wonderful. Great experience
- Reviewed on 8/8/2025
The whole entire staff that I interacted with was very helpful, friendly, and courteous. Dr. McMahon was really good and listened to me about my concern from a previous experience and reassured me that I will be taking care of and not to worry which will make things a little bit less worrisome.
- Reviewed on 8/8/2025
Great doctor, and friend.
- Reviewed on 8/5/2025
Dr. McMahon and his staff are wonderful!
- Reviewed on 8/3/2025
Everyone is just so considerate and friendly. My Dr. Is the Best.
- Reviewed on 7/31/2025
This was an introductory visit. I felt very comfortable with Dr. McMahon. He explained things to me and listened to my concerns. We decided on a plan of care which I'm very comfortable with. I will totally recommend him to family and friends!
- Reviewed on 7/24/2025
Dr. McMahon is a very good doctor and person!
- Reviewed on 7/23/2025
This visit was my 1st visit,a consultation for a colonoscopy. Dr McMahon from greeting to departure made me feel very comfortable & confident in the fact that he's a great dr. He answered all of my questions &worries no matter how trivial they were.
- Reviewed on 7/18/2025
Friendly courteous knowledge compassionate
- Reviewed on 7/18/2025
Dr. McMahon reassured me. I had a situation with a previous facility and it had nothing to do with Cooper. A lot of scary diagnoses and treatments that they wanted to do and removing surgically parts that may or may not have needed to as a suggestion, but Dr. McMahon took the time and at least is more reassuring for me than what I've had in the past of how to go further with my treatment. So I do appreciate that because it was getting to the point where I really wasn't trusting doctors anymore. And he hasn't given me a reason not to trust him, so I feel happy about that.
- Reviewed on 7/17/2025
I found Dr McMahon to be very considerate and compassionate. He explained everything in a way that was easy to understand and took as much time as I needed.
- Reviewed on 7/3/2025
Very good
- Reviewed on 7/3/2025
Great Doctor.
- Reviewed on 7/2/2025
I had a great experience with Dr. McMahon and his entire office. Dr. McMahon is very patient, caring, and he listens to your concerns. Dr. McMahon and his staff are very professional, friendly and efficient. Thank you so much.
- Reviewed on 7/2/2025
I was impressed with the Dr and his staff.
- Reviewed on 7/2/2025
Nothing really. It was all said in my answers. This is a terrific staff and a great doctor
- Reviewed on 6/20/2025
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.
- Reviewed on 6/19/2025
Great atmosphere and the doctor was very friendly
- Reviewed on 6/16/2025
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.
- Reviewed on 6/6/2025
This was a great, interactive visit.
- Reviewed on 3/14/2025
Dr. McMahon was quite familiar with my previous health experiences. It was obvious that he had read my file before our visit.
- Reviewed on 3/13/2025
Thanks
- Reviewed on 3/9/2025
Dr McMan was great
- Reviewed on 2/14/2025
Dr.Mcmahan is a compassionate doctor and treated me with respect .Explained everything well and answered all questions.I recommended him to all my friends and family.
- Reviewed on 1/11/2025
Dr. McMahon, Listens to what you have to say and doesn't like keeping you on medications you don't need. I wasn't rushed. I felt what I had to say, really mattered.
- Reviewed on 1/10/2025
was very down to earth and comfortable with him.