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NYU Langone Nassau Gastroenterology Associates

We offer state-of-the-art gastroenterology care, as well as advanced screening, diagnosis, and treatment.

NYU Langone Nassau Gastroenterology Associates offers the highest level of patient care related to the prevention, diagnosis, and treatment of digestive disorders, including Crohn’s disease and ulcerative colitis. We perform a wide variety of screening and therapeutic procedures, including sigmoidoscopy, colonoscopy, upper endoscopy, and acid (pH) monitoring, in the comfort of our offices.

We also continue to advance our knowledge of gastrointestinal diseases through clinical trials, which our patients are invited to join. Clinical trials take place onsite at our location through our clinical research department, NYU Langone Long Island Clinical Research Associates.

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Our Team

Our doctors provide advanced care for gastrointestinal diseases.

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Our Leadership

  • Seymour Katz, MD

    Dr. Seymour Katz, the senior member of NYU Langone Nassau Gastroenterology Associates, has been practicing medicine since 1971 and is a world-renowned expert in managing inflammatory bowel disease and ulcerative colitis. He has participated in numerous clinical trials, lectured nationally and internationally, and is a past president of the American College of Gastroenterology, an international organization representing more than 12,000 physicians.

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Our Location

NYU Langone Nassau Gastroenterology Associates

1000 Northern Boulevard
Suite 140
Great Neck, NY 11021