Dr. Mark Mattar, MD

Dr. Mattar practices at Medstar Medical Group II in Arlington, Virginia.

Dr. Mattar's NPI, 1841401031, was assigned on May 27, 2007. Dr. Mattar holds District of Columbia license MD036652.

Dr. Mattar's primary practice is Medstar Medical Group II, at 2000 15th N St, Arlington, VA 22201 in Arlington County. The practice phone is (443) 444-5606.

Dr. Mattar's primary practice is Medstar Medical Group II in Arlington, Virginia. Dr. Mattar is also affiliated with MedStar Georgetown University Hospital. The medical group on file is MedStar Medical Group.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mattar practices. Vendor and product names are available with a free account.

Gastroenterology is Dr. Mattar's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Mattar's licenses on file in 3 states: District of Columbia, California and Virginia.

CMS data shows 252 Medicare services from Dr. Mattar across 8 procedure codes in 2024, for 227 Medicare patients. Medicare paid $35,350 for them.

CMS counts 227 Medicare patients who saw Dr. Mattar in 2024. The largest group is 65 to 74, with 104 patients. 74% of them have high blood pressure, and 73% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.58, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Mattar's median patient age at 49, with 52% women.

In 2024, Dr. Mattar wrote 301 Medicare Part D claims for 55 patients. 38% of them were for generic drugs. CMS names the drug for 209 of them, across 6 drugs with 11 or more claims each, at $3,929,479 in total drug cost. In 2023, CMS named 123 claims across 3 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Mattar for performance year 2024, reported as part of a group. Dr. Mattar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mattar as offering telehealth. CMS counts 95 procedures of colonoscopy by Dr. Mattar, more than 79% of the clinicians it reports for that procedure.

Dmand AI links 22 papers to Dr. Mattar, published from 2018 to 2025. 2021 was the busiest year, with 3. The most frequent topics are Colitis, Ulcerative, Clostridioides difficile and Colitis. Dr. Mattar has published most often in World J Gastrointest Endosc. Dr. Mattar's most frequent co-authors are Alexander Eric Dao, MD, David B. Doman, MD and Obada M. Tabbaa, MD.

Dmand AI links Dr. Mattar to 3 clinical trials. 1 is still active or recruiting. Conditions studied include Crohn Disease, Inflammatory Bowel Diseases and Clostridium Infections.

CMS Open Payments shows 508 general payments to Dr. Mattar from 19 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 80% of the total. Abbvie Inc. paid the most, $209,855.