All locations are open for appointments and procedures, including COVID-19 testing. Schedule an appointment online or call your doctor’s office. Patients may be accompanied by visitors. Read our updated visitor policy.

If you need help accessing our website, call 855-698-9991
Skip to main content

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.

Recognition

U.S. News & World Report’s “Best Hospitals” ranks NYU Langone among the top 10 hospitals in the country for gastroenterology and GI surgery.

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.

Our Location

NYU Langone Nassau Gastroenterology Associates

1999 Marcus Avenue, Suite 300, Lake Success, NY, 11042

Additional Information

Patient Forms

Review our forms for new and existing NYU Langone patients.

Information About Your Doctor’s Office Visit

Get information to help you prepare and learn what to expect.

Parking

We provide onsite parking with complimentary valet service.

Wi-Fi

Free Wi-Fi is available to patients and visitors.

Referrals

Patients or doctors seeking a referral to one of our physicians may call our office at 516-466-2340.

Office Hours

We are open Monday through Wednesday from 7:00AM to 5:00PM, Thursday from 9:00AM to 5:00PM, and Friday from 8:00AM to 5:00 PM.