MMG Board Certified Gastroenterologists

All of our physicians at Middlesex Monmouth Gastroenterology maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in Gastroenterology.

For more than 75 years, certification by the American Board of Internal Medicine (ABIM) has stood for the highest standard in Internal Medicine and its 19 subspecialties (including Gastroenterology) and means that internists have demonstrated to their peers and to the public that they have the clinical judgment, skills and attitudes essential for the delivery of excellent patient care. ABIM is not a membership society, but a non-profit, independent evaluation organization. Our accountability is both to the profession of medicine and to the public.

These brief biographies will familiarize you with each physician's training, professional credentials and work experience.

  • Steven C. Nadler, M.D., F.A.C.G.

    Dr. Nadler received his medical degree from UMDNJ, New Jersey Medical School in Newark, NJ. He completed his Internal Medicine Internship and Residency, as well as his Gastroenterology Fellowship training  at UMDNJ, Robert Wood Johnson University Hospital, New Brunswick, NJ. He is ABIM Board Certified in both Internal Medicine and Gastroenterology. He is a Fellow of the American College of Gastroenterology.

    Since 1993, Dr. Nadler has  provided Gastroenterology services to patients in Middlesex and Monmouth counties. He has expertise in all areas of digestive diseases, with special interest in endoscopic procedures, inflammatory bowel disease (ulcerative colitis and Crohn’s disease) and hepatitis.

    Dr. Nadler is the Medical Director of Freehold Endoscopy Associates / Endoscopy Center of Monmouth County.

  • Arthur J. Geller, M.D., F.A.C.P., F.A.C.G.

    Dr. Geller received his medical degree from Columbia University in NY. He completed his Internal Medicine training at the North Shore University Hospital, Memorial Sloan-Kettering Cancer Center program of the Cornell Hospitals. He completed his Gastroenterology Fellowship at UMDNJ, Robert Wood Johnson University Hospital, New Brunswick, NJ. Dr. Geller is Board Certified in both Internal Medicine and Gastroenterology and is a Fellow of the American College of Physicians and the American College of Gastroenterology.

    As a Wilson-Cook Scholarship recipient, Dr. Geller studied advanced endoscopic procedures at Georgetown University Medical Center in Washington, D.C. He also served as the therapeutic endoscopist at the liver transplant center at Albert Einstein Medical Center in Philadelphia. He has held teaching appointments at the University of Florida, Temple University in Philadelphia and Georgetown Medical School. Dr. Geller has authored chapters in medical textbooks on Gastroenterology and has authored several articles for medical journals.

    Dr. Geller has been named a “N.J. Top Doc” for his commitment to excellence in Gastroenterology for 2016, 2017, 2018, 2019, 2020, 2021 and 2022.

  • Colin C. Brown, M.D., M.S.P.H

    Dr. Brown received his medical degree from Temple University in Philadelphia. He completed his medical Internship and Residency training at Boston Medical Center and his Gastroenterology Fellowship training at University of Alabama Birmingham. He is Board Certified in Internal Medicine and Gastroenterology.

    Dr. Brown practiced Internal Medicine during his Fellowship years. He has co -authored papers on colorectal neoplasia and gastrointestinal angiodysplasia, and has contributed to an upcoming textbook on Gastroenterology and Hepatology.

    Dr. Brown is the Co-Medical Director of Allied Digestive Health's Clinical Research Organization.

  • Kunal Gupta, M.D., M.B.A.

    Dr. Gupta received his medical degree from the UMDNJ-Robert Wood Johnson Medical School in New Jersey, where he also completed his medical internship and residency training in Internal Medicine with Distinction in Research.  He completed the three-year Gastroenterology Fellowship program at the University of Vermont-Burlington with advanced training in Endoscopic Ultrasound (EUS) and Endoscopic Retrograde Cholangiopancreatography (ERCP).

    Dr. Gupta is Board-Certified in both Internal Medicine and Gastroenterology.

    Dr. Gupta currently serves as the Chair of Internal Medicine at CentraState Medical Center in Freehold, and the Chief of Gastroenterology at Bayshore Community Hospital (Holmdel, NJ). He is also the Co-Director of Advanced Endoscopy at CentraState Medical Center.

  • Robert S. Aaron, M.D.

    Dr. Aaron received his undergraduate degree from Tufts University, where he graduated with honors. He then received his M.D. from UMDNJ-Robert Wood Johnson Medical School, where he was elected into the Gold Humanism Honor Society. Dr. Aaron went on to complete his Internal Medicine residency at Lahey Hospital and Medical Center in Massachusetts. He then completed his Gastroenterology fellowship at Maimonides Medical Center in New York.

    Dr. Aaron is board certified in both Internal Medicine and Gastroenterology. He has a special interest in chronic liver disease and fecal microbiota transplantation and has expertise in all facets of general gastroenterology.

    Prior to joining MMG, Dr. Aaron was in private practice in Stoneham, MA.

MMG Board Certified Anesthesiologists

During endoscopic procedures at The Endoscopy Center of Monmouth County one of our outstanding, Board Certified anesthesiologists may administer sedation. This is done to maximize the patient’s comfort and safety. Our group of anesthesiologists has vast experience with sedation for endoscopy and colonoscopy, and each individual is an integral part of our team.

MMG Board Certified Pathologist

Specimens obtained during procedures at The Endoscopy Center of Monmouth County will be interpreted by our Board Certified pathologist who has extensive experience with interpreting gastrointestinal biopsy specimens. Our pathologist is always available to answer patient questions or concerns regarding their pathology results and welcomes the opportunity to help in the care of all MMG patients

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