Dr. Mark Mattar, MD
Dr. Mark Christopher Mattar MD is a male Internist, has 6 years of experience and practices in Gastroenterology.
Video profile
Dr. Mark Mattar has 2 office locations.
Medstar Georgetown University Hospital
3800 Reservoir Rd NW
Northwest Washington, Washington, DC 20007

Phone Number
Locations and availability (2)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

  • Currently 4 of 4 stars
Patient comments (1)

The overall average patient rating of Dr. Mark Mattar, Gastroenterologist is Excellent. Dr. Mattar has been reviewed by 1 patients who have provided 1 comments. The rating is 4 out of 4 stars.

Patient Ratings
Ease of Appointment 4.0
  • Currently 4 of 4 stars
Promptness 4.0
  • Currently 4 of 4 stars
Courteous Staff 4.0
  • Currently 4 of 4 stars
Accurate Diagnosis 4.0
  • Currently 4 of 4 stars
Bedside Manner 4.0
  • Currently 4 of 4 stars
Spends Time with Me 4.0
  • Currently 4 of 4 stars
Follows Up After Visit 4.0
  • Currently 4 of 4 stars

Specialties & Research

Dr. Mark Mattar, MD is board certified in Gastroenterology.

  • He has special expertise in 7 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Colon Cancer
  • Hepatitis
  • Inflammatory Bowel Diseases (IBD)
  • Irritable Bowel Syndrome (IBS)
  • Probiotics
  • Ulcerative Colitis

Education & Awards

Dr. Mattar graduated from Virginia Commonwealth University, Richmond.


Dr. Mattar has 2 hospital affiliations:

  • Inova Mt Vernon Hospital 
  • Georgetown University Hospital 

Accepted Insurance Plans

Dr. Mattar accepts these health insurances in at least one office:

  • Aetna - 3 plans


  • Arabic
  • Spanish

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Additional Information
Where does Dr. Mark C. Mattar practice?
Dr. Mark Mattar practices Gastroenterology near Washington, DC.
Additional practice locations include: Alexandria, VA.
See Washington Gastroenterologists.