About Us

In the Washington Metropolitan area, you have many options when choosing a gastroenterologist, but my practice is different!  Here are some of the ways:

  • Phones are answered by a real person who will actually be able to help you with scheduling office visits and endoscopic procedures was well as insurance and billing matters.
  • I am Board Certified gastroenterologist and I will personally be attending to your care.
  • You will be seen by the same person for your consultation, procedures, and follow up visits.
  • Procedures are performed at both an outpatient surgical center and Medstar Montgomery Medical Center, depending on your medical needs, insurance plan, and preferences. 

Did you know that —

Your out-of-pocket cost is typically 50% lower if procedures are performed in an ambulatory surgery center.  Hospital based doctors may not be able to offer this option.

A Board Certified doctor has years of formal training in their specialty, while a nurse practitioner or physician assistant may have no formal training at all.


Marc L. Kozam, MD

I have been in private practice in Olney, Maryland since 1996, live with my family in nearby Sandy Spring, and am proud to have served over 13,000 patients from my community.

I received my undergraduate degree in Biochemical Sciences at Harvard University, then did research at Massachusetts General Hospital before entering the University of Alabama School of Medicine.  I completed my internship and residency in internal medicine at the University of Maryland, then completed my fellowship in gastroenterology at Georgetown University Hospital.

I have been listed in Washingtonian’s Best Doctors and was named as Medstar Montgomery’s Physician of the Year.

I serve as President of the Medical Staff at Medstar Montgomery Medical Center and am a member of the Board of Directors. I also Chair the Quality & Safety Committee and am Physician Chair of the Pharmacy and Therapeutics Committee.


Gina Metzler

Gina is the Office Manager and handles matters related to medical insurance and billing.  She has worked in this role since 2005.  If you have questions, she likely knows the answer.


Hazel Burrel-Jones

Hazel will likely greet you, either in person or on the phone.  She has worked in the medical field for more than 30 years and has worked with me since 2006.  Her primary responsibilities are for scheduling and medical records, but will gladly help with other matters.