Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Mark Mattar, MD

Individual provider Gastroenterology Physician · NPI 1841401031

Dr. Mark Mattar, MD is a Gastroenterology in Washington, District of Columbia. Qualified in 2004, 22 years ago. Practices with Medstar Medical Group II LLC, a 3,717-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California, District of Columbia and Virginia.

Years since qualifying
22
Licensed in
CA, DC, VA
In the registry since
2007
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3800 Reservoir Rd NW
Washington, DC 20007
Phone: (024) 448-5412
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 8109 Hinson Farm Rd, Alexandria, VA 22306-3415 — (703) 780-0994

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD036652 (DC)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 0101247425 (VA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence A95008 (CA)

Record details

NPI number1841401031
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 27, 2007
Last updated in NPPESJanuary 17, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Medstar Medical Group Ii Llc — 3717 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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