GANJ – Wayne Location (246 Hamburg Tpk.) in Wayne
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Office in Wayne
  • Areas of Practice:
  • Gastroenterology

GANJ – Wayne Location (246 Hamburg Tpk.)

About Us

Gastroenterology Associates of New Jersey (GANJ) is an integrated group practice comprised of a team of highly skilled gastroenterologists. As part of our dedication to complete care, our board certified physicians and professional staff will effectively evaluate, diagnose and treat acute and chronic gastrointestinal conditions and diseases.

With locations throughout northern & central New Jersey, our multidisciplinary practice offers coordinated and comprehensive services with an emphasis on personalized care for patients of all ages and activity levels. In addition, our practice is affiliated with five ambulatory surgery centers where our advanced procedures are performed in a warm, comfortable environment on an outpatient basis.

Speaking about issues relating to one’s gut health isn’t easy. The physicians here at GANJ help put their patients at ease so that they create a treatment plan for whatever the situation.

For more information on our premier physicians, locations or services, contact us today.

Our Doctors

Rini Abraham, MD, PharmD

Dr. Rini Abraham is a gastroenterologist at Gastroenterology Associates of New Jersey. Dr. Abraham has expertise in Botox® injections for achalasia, Bravo pH monitoring, Capsule endoscopy, Colonoscopy, Esophageal dilation for achalasia and esophageal strictures, Genetic testing for colon cancer screening, High-resolution anorectal manometry, High-resolution esophageal manometry, Management of inflammatory bowel diseases, Management of liver disease, Percutaneous endoscopic gastrostomy placement, and Upper endoscopy.

Education & Training
  • Dr. Abraham completed her fellowship in gastroenterology at New York University in New York, NY as well as her residency and internship at NYP/Weill Cornell Medical Center in New York, NY.
  • In addition, she received her medical degree from University Hospital in Newark, NJ and her pharmacy degree from the Albany College of Pharmacy and Health Sciences in Albany, NY.
  • Board Certifications
  • American Board of Internal Medicine – Internal Medicine
  • American Board of Internal Medicine – Gastroenterology
  • Honors and Awards
  • Castle Connolly Top Doctor Since 2020
  • Castle Connolly Exceptional Women in Medicine 2022, 2023, 2024
  • Oren E. Bernheim, MD

    Dr. Oren E. Bernheim is a gastroenterologist at Gastroenterology Associates of New Jersey (GANJ). Board certified by the American Board of Internal Medicine, Dr. Bernheim has expertise in Diagnostic and therapeutic upper and lower endoscopy, Management of chronic liver disease and cirrhosis, and Management of complicated inflammatory bowel disease. Prior to his position at GANJ, Dr. Bernheim conducted extensive research for the Division of Gastroenterology at Icahn School of Medicine at Mount Sinai in New York, NY.

    Throughout the course of his career, Dr. Bernheim has conducted several poster presentations, oral presentations and talks on various gastrointestinal issues. He also has authored multiple publications in medical journals dedicated to research in the field of gastroenterology.

    Education & Training
  • Dr. Bernheim completed a fellowship in gastroenterology at Mount Sinai Hospital in New York, NY.
  • His residency in internal medicine was completed at New York Presbyterian – Weill Cornell Medical Center in New York, NY, during which time he served as Assistant Chief Resident.
  • Furthermore, he received his medical degree with honors from the Albert Einstein College of Medicine in Bronx, NY and earned his Bachelor of Science in neuroscience and behavioral biology at Emory University in Atlanta, GA.
  • Honors and Awards
  • Castle Connolly Top Doctor Since 2020
  • Michael M. Mainero, MD

    Dr. Michael M. Mainero is a gastroenterologist at Gastroenterology Associates of New Jersey (GANJ). Along with three board certifications, Dr. Mainero specializes in all aspects of diagnostic and therapeutic endoscopies, including endoscopic retrograde cholangiopancreatography (ERCP) and endoscopic ultrasound.

    Education & Training
  • Dr. Mainero completed a GI fellowship at St. Joseph’s Regional Medical Center in Paterson, NJ and Saint Michael’s Medical Center in Newark, NJ through Seton Hall University.
  • He also completed his residency in internal medicine at St. Joseph’s Regional Medical Center in Paterson, NJ.
  • Dr. Mainero is a Fifth Pathway physician, receiving his medical degree from Universidad Autónoma de Guadalajara in Jalisco, Mexico and completing a year of clinical work at Rutgers New Jersey Medical School in Newark, NJ.
  • Hospital Affiliations
  • Chairman of the Medical Executive Committee at St. Joseph’s Regional Medical Center in Paterson, NJ
  • Honors and Awards
  • Awarded Castle Connolly Top Doctors 2023
  • Awarded Bergen County’s Top Doctors 2023
  • Teaching Appointments
  • Clinical instructor at St. George’s University School of Medicine
  • Professional Memberships
  • Medical Society of New Jersey
  • American Society for Gastrointestinal Endoscopy
  • American College of Physicians
  • American College of Gastroenterology
  • American Gastroenterology Association
  • Our Services

    Serving multiple counties in northern and central New Jersey, Gastroenterology Associates of New Jersey (GANJ) utilizes the latest techniques of the industry to effectively diagnose and/or treat an array of acute and chronic gastrointestinal conditions. With a team approach and an extensive network of experienced physicians, GANJ is able to provide complete care for disorders of the digestive system for patients of all ages. All procedures are performed in the comfort of the office or in one of our advanced ambulatory surgery centers.

    Procedures we perform include:

    For more information on the procedures we perform or to schedule an appointment, contact us today.

    At Gastroenterology Associates of New Jersey, our specialized team of physicians and staff has years of combined experience providing care for acute and chronic gastrointestinal conditions. With an advanced network and a team approach, we provide an efficient diagnosis, customized treatment and preventive care plan for the individual needs of you and your family.

    Conditions we treat include:

    For more information on the conditions we treat or to schedule an appointment with one of our specialists, contact us today.

    Our Office
    Phone: 973-233-9559
    Fax: 862-336-9987
    Monday: 9:00 AM - 5:00 PM
    Tuesday: 9:00 AM - 5:00 PM
    Wednesday: 9:00 AM - 5:00 PM
    Thursday: 9:00 AM - 5:00 PM
    Friday: 9:00 AM - 5:00 PM
    Saturday: Closed
    Sunday: Closed
    Additional Contact Information

    Are you currently a patient of GANJ? Click here to access your encrypted, secure patient portal so you can access information 24/7 from the comfort and privacy of your own home or office.


    Please see below for a full list of our Accepted Insurance Plans:

    • Medicare NJ*
    • Medicaid NJ
    • Aetna PPO/HMO/Medicare
    • Amerigroup
    • Americhoice
    • Amerihealth (HMO/PPO/POS)
    • Empire BCBS
    • Beech Street / Medichoice
    • Humana
    • Cigna (HMO/PPO/POS)
    • Community Care Network
    • Consumer Health Network
    • Devon / Americare
    • Emblem Health (PPO/HMO)
    • First Health
    • Galaxy
    • GHI (PPO/HMO)
    • Healthnet
    • Horizon BCBS of NJ (PPO/HMO/Traditional)
    • Horizon NJ Health
    • Local 825
    • Local 1199 (thru Aetna)
    • Magnacare
    • Health Republic
    • Multiplan
    • “Oxford (Liberty/Freedom/Medicare)”
    • Qualcare (HMO / PPO)
    • Railroad Medicare
    • Tricare
    • “United Healthcare (HMO, PPO, POS, EPO)”
    • VNS
    • Wellcare

    *accepted by all of our doctors

    Please note: This list is not all-inclusive and some of our doctors do not participate in all of these plans. To confirm if the doctor participates, please contact your insurance company directly.