Associates in Gastroenterology

E. Serrin Gantt, MD, Ann Marie Stephenson, DO, Shira Spilman, PA-C, William R. Stern, MD

About Us 

At Associates in Gastroenterology, we care about you and your health. Specializing in the diagnosis, treatment and prevention of diseases of the digestive system and liver, we have been promoting excellence in digestive health since 1982.  Our board certified physicians are experts in all aspects of gastroenterology and liver disease and our caring staff will make sure your concerns are fully addressed.  We perform more than 2,000 colonoscopies and endoscopies per year with access to a state of the art AAAHC certified outpatient endoscopy center.


  • 9420 Key West Avenue
    Suite 202
    Rockville, MD 20850


    (301) 251-9555


    (301) 309-0765

Additional Providers

Appointment Forms

The following forms have been posted for your convenience.  We encourage you to download and complete your registration forms prior to your office visit.  This will help us provide you with the most efficient service!  

(We make every effort to keep this information up-to-date, however, forms are subject to change without notice.)

Associates in Gastroenterology

Registration Forms

Preparation Instructions

Locations & Physicians

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