Dr. Joseph G. Shami is a board-certified physician in internal medicine and gastroenterology by the American Board of Internal Medicine. His clinical focus includes performing high resolution esophageal manometry, pH testing and Transoral Incisionless Fundoplication or TIF.
During his time with GANJ, Dr. Shami was also Emeritus Chief for the Division of Gastroenterology, Department of Medicine at St. Joseph’s Regional Medical Center, totaling 14 years overall in the position.
He was also a clinical assistant professor at the School of Health and Medical Sciences at Seton Hall University in South Orange, NJ, for 20 years.
Dr. Shami completed his fellowship in gastroenterology and residency in internal medicine at St. Joseph’s Regional Medical Center. He received his medical degree from the Universita Cattolica del Sacro Cuore in Rome, Italy, and earned a bachelor of science degree in biology from St. Peter’s University in Jersey City, NJ.
Dr. Shami holds several memberships including:
- American College of Gastroenterology
- American College of Physicians
- American Gastroenterological Association
- American Society of Gastrointestinal Endoscopy
- Crohn’s and Colitis Foundation of America
Dr. Shami is fluent in English and Italian, as well as proficient in Spanish and Arabic.
College: Rutgers University, New Brunswick, NJ
Medical School:UMDNJ, Newark, NJ
Residency: UMDNJ, Newark, NJ
Fellowship: UMDNJ, Newark, NJ
Dr. Ramamoorthy is a member of North Jersey Gastroenterology
Awarded by NJ Monthly Magazine Top Doctors 2022
Dr. Haleh Pazwash is a gastroenterologist at Gastroenterology Associates of New Jersey (GANJ). She is double board certified by the American Board of Internal Medicine and the American Board of Gastroenterology.
Dr. Pazwash is currently Chair of the Division of Gastroenterology at Valley Hospital. She had previously served as Chair of Endoscopy Committee until 2017. Prior to her position at GANJ, Dr. Pazwash was in private practice and a partner at Gastrointestinal Associates, P.A. in Ridgewood, NJ. She also volunteered as an associate clinical professor at St. Vincent’s Catholic Medical Center in New York, NY.
Dr. Pazwash completed a fellowship in gastroenterology at St. Vincent’s Catholic Medical Center and a residency in internal medicine at Thomas Jefferson University Hospital in Philadelphia, PA. She received her medical degree from Robert Wood Johnson Medical School and her Bachelor of Arts from Rutgers University in New Brunswick, NJ.
Dr. Pazwash has conducted extensive research, published articles and presented throughout the course of her career, primarily focusing on aspects of endoluminal gastroplication (ELGP). She has also given lectures on various gastrointestinal disorders and diagnostic procedures.
She is a member of the American College of Gastroenterology, the American Society for GI Endoscopy and the New York Society for Gastrointestinal Endoscopy.
Latest published study - BMC Gastroenterology
Awards and Recognitions
Castle Connolly Top Doctor Since 2018
Castle Connolly Exceptional Women in Medicine 2022, 2023, 2024
Bergen County's Top Doctors 2023, 2024
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.
In addition to his position at GANJ, Dr. Mainero is a clinical instructor at St. George’s University School of Medicine and Chairman of the Medical Executive Committee at St. Joseph’s Regional Medical Center in Paterson, NJ.
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.
Dr. Mainero is currently a member of the Medical Society of New Jersey, the American Society for Gastrointestinal Endoscopy and the American College of Physicians. He is also a member of the American College of Gastroenterology and the American Gastroenterology Association.
Awarded Castle Connolly Top Doctors 2023
Awarded Bergen County's Top Doctors 2023
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.
He completed a fellowship in gastroenterology and hepatology at the Montefiore Medical Center in Bronx, NY and a residency in internal medicine at Mount Sinai Hospital in New York, NY. Dr. Krohn also received his medical degree with special distinction for research in hepatology from the Albert Einstein College of Medicine and a Bachelor of Arts in history with summa cum laude honors from Yeshiva University in New York, NY.
In addition to his extensive research during his medical training, Dr. Krohn has three publications and has received academic awards including the Samuel Belkin Scholarship and the Ira Marienhoff Scholarship.
Awarded Castle Connelly Top Doctors 2023
Awarded Bergen County's Top Doctors 2023
David L. Feit, MD attended medical school at Columbia University College of Physicians and Surgeons. His residency training in Internal Medicine was completed at Columbia Presbyterian Medical Center in New York city. He also completed sub-specialty training in Gastroenterology at Columbia Presbyterian in New York City. Dr. Feit is board-certified in Gastroenterology and Internal Medicine. Dr. Feit has been selected as a “Top Doctor” by Castle Connolly, New Jersey Monthly magazine and 201 magazine. Dr. Feit is a member of Hackensack Digestive Disease Associates
Awarded Castle Connolly Top Doctors 2021
Dr. Natasha Chhabra is a gastroenterologist at Gastroenterology Associates of New Jersey. Board-certified by the American Board of Internal Medicine in both Internal Medicine and Gastroenterology.
Dr. Chhabra’s expertise includes:
- Anorectal disorders
- Capsule endoscopy
- Diagnostic and therapeutic upper and lower endoscopy
- Colonoscopy
- Dilation
- Endoscopic band ligation
- Fecal transplantation for Clostridium difficile
- Ischemic bowel disease
- Management of chronic liver disease and cirrhosis
- Percutaneous endoscopic gastrostomy
- Surveillance and ablation of Barrett’s esophagus
- Upper endoscopy
Dr. Chhabra completed her fellowship in Gastroenterology and Hepatology at Montefiore Medical Center in Bronx, NY. She received her medical degree and completed a residency in Internal Medicine at New York University School of Medicine in New York, NY. She graduated summa cum laude from New York University with an interest in Biochemistry and business studies. Throughout her medical training, Dr. Chhabra has had several publications and presentations on various topics.
Awards and Recognitions
Castle Connolly Rising Star 2021, 2022
Castle Connolly Top Doctor Since 2023
Castle Connolly Exception Women in Medicine 2024
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.
Dr. Boxer completed his fellowship in gastroenterology at NYU Langone Medical Center in New York, NY and his residency in internal medicine at Mount Sinai Hospital in New York, NY.
He received his medical degree from Robert Wood Johnson Medical School in New Brunswick, NJ, during which time he was elected to the Alpha Omega Alpha National Medical Honor Society.
In addition, he received his bachelor’s degree in biomedical engineering and biomathematics from Rutgers University in New Brunswick, NJ.
Dr. Boxer has contributed to several publications and conducted many presentations on various topics to the medical community. He has also received several awards throughout the course of his medical training, including the Ira M. Goldstein Award for Outstanding Teaching, the Housestaff Teaching Award, and The Arnold P. Gold Foundation Award for Humanism and Excellence in Teaching.
Media coverage: Becker's Healthcare
Dr. Rini Abraham is a gastroenterologist at Gastroenterology Associates of New Jersey. Dual board certified by the American Board of Internal Medicine in internal medicine and gastroenterology, Dr. Abraham has expertise in:
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.
Throughout her medical training, Dr. Abraham has conducted several presentations on various topics.
Click here for Dr. Abraham's recent presentation on bloating.
Awards and Recognitions
Castle Connolly Top Doctor Since 2020
Castle Connolly Exceptional Women in Medicine 2022, 2023, 2024, 2025
