Mark Christopher Mattar, MD| Gastroenterology | MedStar Health

Mark Christopher Mattar, MD
Provider is directly employed by MedStar Health

4.4 out of 5 (295 reviews)

Specialties: Gastroenterology

Languages: Spanish, Arabic, English

877-303-1462

About me

Dr. Mattar is the director of the IBD Center, with expertise in diagnosing and treating inflammatory bowel diseases (IBD)Crohn's disease, colitis, and celiac disease. Dr. Mattar has a particular interest in IBD therapeutics and IBD and colorectal cancer prevention. He is active in clinical research and medical education for trainees, the community, and patients.
 
Dr. Mattar sees patients in his gastroenterology practice at MedStar Georgetown University Hospital. He embraces a team approach to patient care within the IBD Center at MedStar Georgetown as part of a multidisciplinary treatment team that includes dietitians and other key providers. He is also active in clinical trials for IBD and performs fecal microbiota transplantation for recurrent and refractory C. difficile infection.

Dr. Mattar teaches at MedStar Georgetown University Hospital as Associate Professor of Medicine, and is the director of the Fellowship Training Program in Gastroenterology. He is also an active member of the Crohn's and Colitis Foundation D.C. Metro chapter mission committee, the Professional Education National Scientific Advisory Committee and the Northeast Regional MyIBD Learning Planning Committee.

As the Quality Improvement Officer for the Division of Gastroenterology, Dr. Mattar has been recognized by the American Gastroenterological Association's Bridges to Excellence Program for his commitment to providing comprehensive quality care for patients with IBD.

Dr. Mattar enjoys family time with his wife and son, including fishing in local ponds and creeks. He especially enjoys exploring the Washington museums and playgrounds with his young son. He also enjoys checking out the local cafes and creating his own latte art. 

Patients and practitioners can connect with Dr. Mattar on Twitter (@gastrodocmattar) and follow his tweets on new developments in gastroenterology.

The mission of the training program he directs states, "To create an environment where compassionate medical trainees can learn to provide exceptional quality care to the patients we serve." He prides himself in treated his patients as he would his own family.

Clinical areas of focus

  • Colonoscopy
  • Crohn's Disease
  • Inflammatory Bowel Disease
  • Microscopic Colitis
  • Ulcerative Colitis
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Conditions and procedures

Conditions I treat

  • Abdominal Bloating
  • Abdominal Pain
  • Altered Bowel Habits
  • Anal Fissure
  • Anal Fistula
  • Anemia
  • Blood In Stool
  • Bright Red Blood Per Rectum
  • Celiac Disease
  • Clostridium Difficile
  • Colitis
  • Collagenous Colitis
  • Colon Stricture
  • Colonic Polyps
  • Colorectal Malignancy
  • Crohn's Disease
  • Diarrhea
  • Dysphagia
  • Epigastric Pain
  • Family History Of Colon Cancer
  • Gastroenteritis
  • Gastroesophageal Reflux Disease
  • Hemorrhoids
  • Ileitis
  • Inflammatory Bowel Disease
  • Iron Deficiency Anemia
  • Ischemic Colitis
  • Lymphocytic Colitis
  • Melena
  • Microscopic Colitis
  • Nausea
  • Proctitis
  • Rectal Bleeding
  • Rectal Cancer
  • Rectal Pain
  • Small Bowel Stricture
  • Stomach Cramps
  • Swallowing Problem
  • Ulceration Of Intestine
  • Ulcerative Colitis
  • Ulcerative Proctitis
  • Vomiting
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Procedures I perform

  • Biologic Therapy For Gastrointestinal Diseases
  • Colon Polypectomy
  • Colonoscopy
  • Colorectal Screening
  • Early Detection Of Cancer
  • Endoscopic Mucosal Resection Of Large Colon Polyps
  • Esophagogastroduodenoscopy (EGD)
  • Fecal Transplant
  • Gastrointestinal (GI) Cancer Screening
  • Ileoscopy
  • Proctosigmoidoscopy
  • Sigmoidoscopy
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Practice locations

Distance from Change LocationEnter your Location

3800 Reservoir Road Northwest
Building 2
Washington, DC, 20007

202-444-8541

Fax 877-303-1462

Get Directions

miles away

Fax 877-303-1462

Insurance

MedStar Medical Group accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Medical Group, please call your insurance company.

  • List of insurance plans we accept
    • Aetna Elect Choice/ EPO (Aetna Health Fund) Innovation Health: Network Only Plus
    • Aetna Quality Point of Service (POS)
    • Aetna Student Health Insurance
    • Aetna Medicare Advantage HMO & PPO Plans
    • CFBCBS BlueChoice HMO
    • CFBCBS Blue Choice Opt Out Plus Open Access (POS)
    • CFBCBS Maryland Point of Service Plan (MPOS)
    • CFBCBS Maryland Indemnity or PPO
    • CFBCBS (NCA) Indemnity
    • CIGNA HMO & Network (HMO)
    • CIGNA POS/Network POS
    • Great-West Healthcare POS/CIGNA
    • CIGNA Indemnity
    • Coventry Health Care of Virginia
    • Coventry of Delaware HMO/PPO
    • First Health PPO
    • FIRST HEALTH
    • Tricare Prime
    • Tricare for Life (Medicare Supplemental Plan)
    • MedStar Family Choice - Maryland Health Choice
    • MedStar Select (MedStar Associates' Plan)
    • United Healthcare Select HMO - EPO/NPP
    • United Healthcare Select Plus (POS)
    • United Healthcare Choice Plus
    • United Student Resources
    • M.D. IPA (HMO)
    • M.D. IPA Preferred (POS)
    • Optimum Choice Preferred (POS) & OCI Direct (HMO)
    • Mamsi Life & Health (Indem./PPO)
    • Aetna Worker's Compensation Network
    • Coventry Health Care National Network PPO
    • United Healthcare Choice
    • CIGNA HMO Open Access (OA)
    • Network OA
    • POS OA & OA Plus
    • CIGNA EPO
    • PPO and PPO Plus
    • Choice Fund PPO
    • CFBSBC Blue Preferred PPO
    • HealthyBlue PPO
    • CFBCBS Blue Choice Opt Out Open Access
    • BlueChoice Open Access
    • Aetna Traditional Choice (PPO)
    • Innovation Health: Indemnity
    • Aetna Open Choice (PPO)
    • Innovation Health: PPO
    • Aetna Managed Choice (POS)
    • Innovation Health: POS Plus
    • Aetna Elect Choice/ Open Access (POS)
    • Innovation Health: Open Network Only Plus
    • Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
    • Innovation Health: POS
    • Open HMO
    • Opoen HMO Option
    • Open EPO Plus
    • Aetna Managed Choice Open Access (POS)
    • Choice POS & Choice POS II
    • Innovation Health: Open POS Plus
    • Open POS II
    • Aetna HMO
    • Select HMO/HealthFund/Health Network
    • Aetna Innovations: HMO & EPO Plus
    • Aetna Better Health of Maryland
    • Blue Choice Advantage & Healthy Blue (HMO, POS)"
    • CFBCBS EPO
    • CFBCBS Federal Employee Program (Std/Basic PPO/Blue Focus)
    • Cigna HealthSpring Medicare Advantage
    • Kaiser MD Medicaid MCO
    • Kaiser Permanente Flexible Choice POS
    • Kaiser Permanente Medicare Plus (Medicare Supplemental Plan)
    • Kaiser Permanente Select
    • Kaiser Permanente Signature
    • Kaiser Permanente Signature-Added Choice
    • Kaiser PermanenteSelect-Added Choice
    • Kaiser Virginia Premier
    • Medicare Fee for Service
    • Private Health Care Systems (PHCS) (PPO)
    • UHC Community Plan of MD
    • United Healthcare Options (PPO) (includes Empire PPO, GEHA, Compass Rose)"
    • UnitedHealthcare and AARP Medicare Complete Plans/ UHC Group Medicare Advantage Plans HMO, POS, PPO"
    • UnitedHealthcare Medicare Adv/Special Needs Plans

Videos

Education

Board Certification: American Board of Internal Medicine, Gastroenterology

Fellowship Program: MedStar Georgetown University Hospital (2010)

Residency Program: Olive View - UCLA Medical Center (2007)

Medical School: Virginia Commonwealth University (2004)

Awards

  • Northern Virginia Top Doctor, 2021
  • Washingtonian Top Doctor Award, 2021
  • Washingtonian Top Doctor Award, 2020
  • Fellow, American Gastroenterology Association, 2020
  • Fellow, American College of Gastroenterology, 2018
  • Gastroenterology Fellows Award for Excellence in Teaching, 2015
  • American Gastroenterological Association's Bridges to Excellence Program, 2014
  • Commitment to Patient Care, VA Medical Center, 2012

News and publications


Ratings and reviews

  • Provider explained things understandably

    4.5
  • Provider listened carefully

    4.5
  • Provider knew medical history

    4.4
  • Provider showed respect

    4.6
  • Provider spent enough time with patient

    4.4
  • Oct 4, 2022

    Strong understanding.

  • Sep 6, 2022

    Routine check-up by phone.

  • Aug 31, 2022

    Dr Mattar is very professional and pleasant.