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Gastroenterology Diagnostics of Northern New JerseyGastroenterology Diagnostics of Northern New Jersey

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Your Safety is Our Top Priority

Learn what measures we have taken to keep you safe.

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El cáncer de colon se puede prevenir.

Realícese una prueba por su familia. Realícese una prueba por usted.

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Patient Experience Exceeds Expectations

Our patient experience scores exceed national averages

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45? Time To Screen For Colon Cancer.

Early detection may save your life.

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How We're Keeping You Safe

Learn what steps we've added to keep you safe

Patient Registration

Pre-register online as soon as possible

Request an Appointment

Fill out the form to request an appointment.

About Us

Learn more about our center.

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, esophageal dilation, 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.

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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.

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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.

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Patient Registration

The patient registration portal is designed to help streamline your surgical process. Your medical information is secured and will not be shared with other institutions.

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Meet Our Physicians

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Rini Abraham Rini Abraham M.D. Oren Bernheim Oren Bernheim M.D. Ashok Gupta Ashok Gupta M.D. Michael Mainero Michael Mainero M.D. George Pavlou George Pavlou M.D. Ori Rackovsky Ori Rackovsky M.D. Joseph Shami Joseph Shami M.D. Ariy Volfson Ariy Volfson M.D.
4.8/5
4.8 /5
126 Reviews

Google
5.0/5
Mar 14, 2023
Google • Gastroenterology Diagnostics of Northern New Jersey

Excellent attention by staff and my procedure was done in time.

Google
5.0/5
Mar 7, 2023
Google • Gastroenterology Diagnostics of Northern New Jersey

Great service ! I woke up from Anesthesia in disbelief with how smooth and fast everything went ! Lucy was awesome ! Erika was very caring and Dr.Mainero was just AWESOME ! Definitely will recommend Dr.Mainero & Gastro Diagnostics to my family !

Google
5.0/5
Feb 28, 2023
Google • Gastroenterology Diagnostics of Northern New Jersey

I was super nervous to have the procedure, but everyone made the experience comfortable. Thank you to the whole team. I would definitely recommend them to my friend's and family.

Google
5.0/5
Feb 14, 2023
Google • Gastroenterology Diagnostics of Northern New Jersey

The center is immaculately clean, the staff is cordial, professional, and knowledgeable. They make you feel comfortable and at home.

Google
5.0/5
Feb 14, 2023
Google • Gastroenterology Diagnostics of Northern New Jersey

Excellent service


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Gastroenterology Diagnostics of Northern New Jersey
205 Browertown Road,
Suite 102, Woodland Park NJ 07424

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