GANJ – River Edge Location in River Edge
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Office in River Edge
  • Areas of Practice:
  • Gastroenterology

GANJ – River Edge Location

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

Aditi Chhada, MD

Dr. Aditi Chhada is a member of Hackensack Gastroenterology Associates.  Dr. Chhada has trained in diverse settings including city hospitals, veteran’s hospitals, and private academic centers, which has allowed her to gain a special knowledge and appreciation for the needs of all patients.

Dr. Chhada’s clinical interests encompass general gastroenterology and hepatology. This includes screening and prevention of colorectal cancer, esophageal motility disorders, inflammatory bowel disease, nutrition, cirrhosis, and women’ s health issues.

Education & Training
  • Graduated Magna Cum Laude from Boston University with a bachelor’s degree in Biology.
  • She then continued on in Boston for both medical school and Internal Medicine residency at Boston University School of Medicine and Boston Medical Center, respectively.
  • Dr. Chhada did her clinical fellowship in Gastroenterology at New York University where she earned national recognition for research on Helicobacter pylori.
  • Honors and Awards
  • Castle Connolly Top Doctor Since 2017
  • Castle Connolly Exceptional Women in Medicine 2022, 2023, 2024
  • Bergen County’s Top Doctors 2024
  • Steven Leibowitz, MD

    Dr. Steven Leibowitz is a member of Hackensack Gastroenterology Associates. Affiliated with Hackensack University Medical Center, the group utilizes the most advanced diagnostic and therapeutic modalities in managing inflammatory bowel disease, colorectal and GI malignancies, peptic and motility disorders and hepatobiliary diseases.

    A graduate of Georgetown University Medical School and trained at Cornell University-North Shore University Hospital and Memorial Sloan-Kettering Cancer Center in New York, Dr. Leibowitz prides himself on blending his expertise with quality time in providing care for his patients.

    Education & Training
  • Georgetown University Medical School
  • Cornell University-North Shore University Hospital
  • Memorial Sloan-Kettering Cancer Center
  • Honors and Awards
  • Awarded Castle Connolly Top Doctors 2023
  • Awarded Bergen County’s Top Doctors 2023
  • Richard Lin, MD

    Dr. Richard Lin is board certified in both internal medicine and gastroenterology. He has published abstracts in palliative metallic stenting as well as inflammation’s role in colon cancer. Dr. Lin is a member of Hackensack Gastroenterology Associates.

    While Dr. Lin treats a wide variety of gastrointestinal and liver conditions, including advanced biliary endoscopy, metallic stenting and capsule endoscopy, he has a particular interest in colon cancer as well as Asian American gastrointestinal issues including stomach cancer and Hepatitis B.

    Education & Training
  • Dr. Richard Lin graduated from Yale University with a bachelors in science in Molecular Biophysicis and Biochemistry before completing his medical degree at New York University.
  • Afterwards, he continued his internal medicine training at UCLA-Harbor in California, and then returned to NYU to finish his gastroenterology fellowship.
  • Board Certifications
  • Internal medicine
  • Gastroenterology
  • Honors and Awards
  • Awarded Castle Connolly Top Doctors 2023
  • George Nikias, MD

    Dr. George Nikias is a member of Hackensack Gastroenterology Associates.  His areas of expertise include advanced endoscopy, including ERCP and Endoscopic Ultrasound with Fine Needle Aspiration as well as the management of complex liver disease. Dr. Nikias also offers FibroScan®: painless, accurate, noninvasive way to assess liver health. Click here to learn more

    It is Dr. Nikias’ belief that an individual’s understanding of their illness is the first step in achieving wellness. He looks forward to educating his patients and helping them realize optimal digestive health.

    Education & Training
  • Dr. George Nikias is a graduate of New York Medical College.
  • He completed a residency in Internal Medicine at North Shore University Hospital and Memorial Sloan-Kettering Cancer Center followed by a fellowship in Hepatology at the Mayo Clinic in Rochester Minnesota and a fellowship in Gastroenterology at Memorial Sloan-Kettering Cancer Center.
  • Honors and Awards
  • Dr. Nikias has received numerous distinctions, including being named one of the metro area’s Top Doctors by Castle-Connoly every year since 2007.
  • He was named to the list of  Top Doctors in Gastroenterology by New York  Magazine in 2014.
  • Awarded Castle Connolly Top Doctors 2023
  • Awarded Bergen County’s Top Doctors 2023
  • Eric Rosendorf, MD

    Dr. Eric Rosendorf is Board Certified in Gastroenterology and Internal Medicine. He is a member of Hackensack Gastroenterology Associates.

    Dr. Rosendorf provides comprehensive diagnostic and therapeutic care within the field of Gastroenterology, including interests in colorectal cancer screening, acid reflux and acid related disorders, inflammatory bowel disease, irritable bowel syndrome, liver and pancreatic diseases. He has extensive experience with many diagnostic endoscopic procedures including upper endoscopy (EGD), colonoscopy with polyp removal and ERCP.

    Education & Training
  • He completed his Internal Medicine residency at Tufts-New England medical Center in Boston, Massachusetts in 1998.
  • He completed his Gastroenterology Fellowship at UMDNJ in Newark, New Jersey in 2005.
  • Board Certifications
  • Gastroenterology
  • Internal Medicine
  • 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: 201-489-7772
    Fax: 201-489-2544
    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.