GANJ – Clifton Location (1011 Clifton Ave.)
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.
Andrew Boxer, MD
Dr. Andrew S. Boxer is a gastroenterologist at Gastroenterology Associates of New Jersey. He is board certified by the American Board of Internal Medicine in internal medicine and gastroenterology.
Steven Gronowitz, MD, FACG
Dr. Steven D. Gronowitz is a double board certified by the American Board of Internal Medicine and the American Board of Gastroenterology. Prior to his position at GANJ, he was in private practice for over ten years.
- Dr. Gronowitz has conducted over ten oral/poster presentations throughout the course of his career on relevant topics regarding gastroenterology.
- Recipient of a Certificate of Distinction by The Leo M. Davidoff Society for outstanding achievement as a house officer in the teaching of medical students.
- Awarded Castle Connolly Top Doctors 2023
- Awarded Bergen County’s Top Doctors 2023
Natan Krohn, MD
Dr. Natan Krohn is a gastroenterologist at Gastroenterology Associates of New Jersey (GANJ). He is double board certified by the American Board of Internal Medicine and American Board of Gastroenterology. Prior to his position at GANJ, Dr. Krohn conducted research for Marion Bessin Liver Research Center and the Albert Einstein College of Medicine in Bronx, NY on various topics relevant to the medical community.
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:
- Colonoscopy
- Upper endoscopy (EGD)
- Capsule endoscopy
- Complex polypectomy
- Esophageal manometry
- Bravo® esophageal pH monitoring
- Endoscopic retrograde cholangiopancreatography (ERCP)
- Endoscopic ultrasound (EUS)
- Flexible sigmoidoscopy
- Hemorrhoidal banding
- Breath tests
- Percutaneous endoscopic gastronomy (PEG)
- Pancreatic cyst management
- Radio frequency ablation
- Other Therapeutic endoscopy
- Infusion therapy
- Ano-rectal manometry
- Cholangioscopy
- Double-balloon enteroscopy
- Endoscopic mucosal resection (EMR)
- Endoscopic sub-mucoscal dissection (ESD)
- Endoscopic lithotripsy
- Fistula closure
- Genomic Analysis
- The ORBERA® Balloon
- TIF Procedure
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:
- Colon Cancer screening and polyp surveillance
- Gastroesophageal reflux disease (GERD)
- Swallowing problems
- Barrett’s Esophagus
- Diverticulosis and Diverticulitis
- Celiac disease/gluten intolerance
- Irritable Bowel Syndrome
- Ulcerative Colitis
- Crohn’s Disease
- Constipation, diarrhea & stool abnormalities
- Abdominal pain and gastritis
- Ulcers
- Gallstones
- Pancreatitis
- Liver Disease
- Hemorrhoids
- Cancers of the esophagus, stomach, small intestine and colon; and of the pancreas, bile ducts, liver and gallbladder
- Hernias
- Dumping syndrome
For more information on the conditions we treat or to schedule an appointment with one of our specialists, contact us today.
Fax: 973-471-3032
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
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.