Dr. Rosendorf is Board Certified in Gastroenterology and Internal Medicine. He completed his Internal Medicine residency at Tufts-New England medical Center in Boston, Massachusetts in 1998 and his Gastroenterology Fellowship at UMDNJ in Newark, New Jersey in 2005. Dr. Rosendorf 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.
Call us at 201-489-7772 if you have any questions or would like to schedule an appointment.
Dr. Aditi Chhada 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. She has performed additional research on colorectal cancer screening and prevention, specifically in patients with renal disease. Dr. 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.
Call us at 201-489-7772 if you have any questions or would like to schedule an appointment.
Awards and Recognitions
Castle Connolly Top Doctor Since 2017
Castle Connolly Exceptional Women in Medicine 2022, 2023, 2024
Bergen County's Top Doctors 2024
Gabrielle Yohannan graduated from the Master of Science in Physician Assistant program at Seton Hall University in May, 2019.
The program provides a foundation for graduates to practice evidence-based, patient-centered medicine. Ms. Yohannan has developed a focus in the management of gastrointestinal diseases in both the office and hospital settings.
She joined our practice in August, 2019.
Anna M. Nieves is an Advanced Practice Nurse with Gastroenterology Associates of New Jersey. She is board certified by the American Nurses Credentialing Center in Adult and Gerontology Primary Care.
Prior to her position with GANJ Anna was a Critical Care Nurse. She assisted in the management of a diverse population of patients with both acute and chronic conditions, served as Charge Nurse and Preceptor/ Mentor to staff nurses.
She received her Master Of Science in Nursing from Walden University and her Bachelor of Science in Nursing from the College of Saint Elizabeth in Morristown, NJ.
In addition, she is multi-lingual, fluency in English and Spanish.
Diane Naraine is a Family Nurse Practitioner, board-certified by the American Academy of Nurse practitioners (AANP) and is ACLS, BLS/instructor and PALS certified.
Diane joined Gastroenterology Associates of New Jersey in May 2019. She graduated from Montclair State University with her Bachelors of Science in Biology and later went on to earn her Accelerated Bachelor’s Degree in Nursing (BSN) at Felician College. During her time at Montclair State University, she served as an Emergency Medical Technician (EMT) on the campus.
After working several years as an Emergency Trauma Nurse, she quickly advanced her education earning her Master’s Degree in Nursing from Fairleigh Dickson University in just two years. Diane also received induction into the National Nursing Honor Society: Sigma Theta Tau. Majority of her Nursing experience and skills was earned at Hackensack University Medical Center Emergency Trauma Department. When Diane is not helping patients she enjoys teaching CPR to the community.
William Paterson College, BSN, Wayne, NJ
William Paterson University, MSN, Wayne, NJ
Dr. Kenneth G. Zierer is a gastroenterologist at Gastroenterology Associates of New Jersey. He is triple board certified in internal medicine, pediatrics and gastroenterology by the American Board of Internal Medicine.
Dr. Zierer also offers FibroScan®: painless, accurate, noninvasive way to assess liver health. Click here to learn more
Dr. Zierer completed a fellowship in hepatology, a combined residency and internship program for internal medicine and pediatrics as well as his medical degree from Rutgers New Jersey Medical School in Newark, NJ. In addition, he received his bachelor’s degree from George Washington University in Washington, D.C.
Awarded Castle Connolly Top Doctors 2023
Awarded Bergen County's Top Doctors 2023
Dr. Mark E. Tanchel is board certified in gastroenterology by the American Board of Internal Medicine. He is a member of the American Gastroenterological Association and the American Society for Gastrointestinal Endoscopy.
A native of Cape Town, South Africa, Dr. Tanchel completed his Gastroenterology fellowship at the University of California San Francisco Medical Center and his medical residency at Tufts-New England Medical Center in Boston. He is a graduate of Tufts University School of Medicine in Boston, where he earned the Walter Dameshek Award for outstanding achievement in Internal Medicine and the Robert J. Fahey Award for excellence in physical diagnosis. He is also a summa cum laude graduate of Brandeis University.
Dr. Tanchel is affiliated with Hackensack University Medical Center at Hackensack Meridian Health where has participated in teaching gastroenterology fellows from the UMDNJ Newark School of Medicine. Dr. Tanchel’s work has been published in peer-reviewed publications. He has been selected as a Top Doctor by NJ TopDocs, as well as a Top Doctor for the New York Metro Area by Castle Connolly.
Dr. Tanchel is a member of Hackensack Digestive Disease Associates
Awards and Recognitions:
Bergen County's Top Doctors 2023
NJ Top Docs 2024
Castle Connolly New York Metro Area
Dr. Frank Ruiz is a gastroenterologist at Gastroenterology Associates of New Jersey.
Dr. Ruiz completed a fellowship in gastroenterology, a residency and internship in internal medicine as well as his medical degree at Rutgers New Jersey Medical School in Newark, NJ.
In addition, he received his Bachelor of Science degree from Seton Hall University in South Orange, NJ.
Awarded Castle Connolly Top Doctors 2023
Dr. Ori Rackovsky carries dual board certification in internal medicine and gastroenterology by the American Board of Internal Medicine.
Dr. Rackovsky earned a bachelor of arts magna cum laude from Yeshiva University in New York City. He earned his medical degree, with distinction in research, from the Icahn School of Medicine at Mount Sinai in New York City. During medical school, Dr. Rackovsky was the recipient of the prestigious Medical Research Fellowship from Howard Hughes Medical Institute to support his research in digestive diseases. Following medical school, he completed his residency in internal medicine at Mount Sinai, during which time he was elected to the Alpha Omega Alpha medical honor society in recognition of outstanding mentoring and clinical skills. He completed his fellowship at Mount Sinai's Dr. Henry D. Janowitz Division of Gastroenterology, where he trained with leaders in the field of inflammatory bowel diseases.
Dr. Rackovsky’s work in liver fibrosis and inflammatory bowel disease has been published in peer-reviewed journals and presented at local, national, and international conferences.
Awarded Castle Connelly Top Doctors Award yearly since 2021
