Patient Finds Answers Through Timely GI Evaluation at ASC
Discover how one patient found answers for chronic digestive issues at an ambulatory surgery center (ASC).
Woodland Park’s Leading GI Specialists Dedicated to Patient Care
Our Woodland Park gastroenterologists and staff at Gastroenterology Diagnostics of Northern NJ are dedicated to providing quality, affordable care to the community in our quest to lower colon cancer rates and treat an array of digestive diseases, including Crohn’s Disease, irritable bowel syndrome (IBS) and gastroesophageal reflux disease (GERD). Gastroenterology Diagnostics of Northern NJ is skilled in performing a myriad of digestive procedures, including colonoscopy, flexible sigmoidoscopy, upper endoscopy and small bowel enteroscopy.
We believe in compassionate medicine, where patients feel reassured and unrushed. We hold ourselves to the highest of standards as the center is accredited by the Accreditation Association for Ambulatory Health Care (AAAHC).
We are also honored to be part of the American Society for Gastrointestinal Endoscopy (ASGE) Endoscopy Unit Recognition Program (EURP), which honors units that have demonstrated a commitment to delivering quality and safety as reflected in their unit policies, credentialing, staff training and competency assessment as well as their quality improvement activities.
Our patients value the compassionate care they receive from our doctors and say they are likely to recommend our center to family and friends.
For Your Visit
Our gastroenterologists and staff at Gastroenterology Diagnostics of Northern NJ are committed to ensuring your experience with us is relaxed and worry-free, from your first office visit through your post-procedure follow-up. To assist us, we ask you read and comply with all guidelines.
We’re pleased to announce our partnership with StopColonCancerNow.com to help boost colon cancer screenings and prevention for residents in the Woodland Park area.
Patient Forms
At Gastroenterology Diagnostics of Northern NJ, your time is as valuable to us as it is to you. Upon scheduling your surgery, a member of our staff will provide you with the required forms to fill out.
Insurance and Billing
Gastroenterology Diagnostics of Northern NJ accepts most major insurance. As a courtesy to you, we will bill your insurance carrier; however, we cannot tell you what your policy will cover.
Artificial Intelligence
Gastroenterology Diagnostics of Northern NJ has integrated state-of-the-art Artificial Intelligence (AI) technology to enhance the precision and effectiveness of our colonoscopy procedure. This AI system digitally analyzes real-time video feeds, assisting our gastroenterologists in identifying polyps.
1,048 Reviews
Mar 18, 2026
Mar 18, 2026
My experience with Dr. Shami and the team was overall very positive. The preparation the day before the procedure was definitely the hardest part, but the office did a great job communicating with me. I received clear instructions ahead of time and text reminders several days before the procedure, and they were available if I had any questions. On the day of the colonoscopy, the staff made me feel very comfortable and well taken care of. The nurse who prepared me had excellent bedside manner and was very attentive. The anesthesiologist was also very kind and reassuring, which helped me feel calm before the procedure. Dr. Shami was professional and made me feel safe and confident in the care I was receiving. After the procedure, another nurse stayed with me during recovery and made sure I was comfortable, hydrated, and feeling better before I left. I really appreciated how attentive the whole team was. Overall, it was a great experience with a caring and professional medical team.
Mar 18, 2026
First off Dr Mainero is excellent and easy to talk to. the staff is very nice and have the routine down pat and are efficient. I would highly recommend them
Mar 16, 2026
Clean facility, expert staff from reception to the nurses and the doctors. I had a colonoscopy, so forgive me for not including a photo with my review.
Recent Posts
Dr. Joseph Shami Quoted in Best Life Article on Digestive Health
We’re proud to share that Dr. Joseph Shami of Gastroenterology Diagnostics of Northern New Jersey was recently featured in a Best Life article.
You're Not Too Young: Why Colon Cancer Screening Matters
Colorectal cancer is increasingly affecting adults under 50, making it a growing concern among younger populations.
Excellent communication, Very friendly Staff, A+++