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, disease monitoring, and colorectal cancer prevention. He is active in clinical research and medical education for trainees, the community, and patients. He is certified in intestinal ultrasound (IUS), which he applies to advancing IBD patient care and research. Dr. Mattar directs the IUS program at MedStar Health, which is the only center in the Mid-Atlantic outside of New York that serves as a certified training site.
Dr. Mattar sees patients in his gastroenterology practice in the IBD Center at MedStar Georgetown University Hospital. He embraces a collaborative approach to patient care as part of a multidisciplinary treatment team that includes dietitians and other key providers. To learn more about IBD, click here. He is also active in clinical trials for IBD therapies.
Dr. Mattar teaches at MedStar Georgetown University Hospital as 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
- Crohn's Disease
- Inflammatory Bowel Disease
- Ulcerative Colitis
Conditions and procedures
Procedures I perform
- Bedside Intestinal Ultrasound For Inflammatory Bowel Disease
- Colonoscopy
- Colonoscopy With Biopsy
- Colonoscopy With Chromoendoscopy
- Colonoscopy With Dilation
- EGD With Biopsy
- Esophagogastroduodenoscopy With Biopsy
- Pouchoscopy
- Sigmoidoscopy With Biopsy
- Small Intestinal Endoscopy With Biopsy
- Upper Gi Endoscopy
- Upper Gi Endoscopy With Biopsy
Practice locations
Distance from Change Location Enter your Location
3800 Reservoir Rd NW
Main Bldg 2nd Fl
Washington, DC, 20007
Insurance
MedStar Health accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Health, please call your insurance company.
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List of insurance plans we accept
- DC/MD SHOP QHP Small Business Plans
- Beech Street PPO
- Veterans Affairs Community Care Network
- OA Plus
- Advantra Platinum (PPO)
- IH-Open HMO
- CareFirst NASCO
- CIGNA HMO Open Access
- POS OA
- Cigna Achieve Medicare (HMO C-SNP)
- BlueChoice Open Access
- Cigna True Choice Medicare (PPO)
- Alterwood Advanatge HMO & DSNP Plans
- CIGNA Indemnity
- Employee Health Plan
- Aetna Better Health of VA
- Johns Hopkins Advantage MD HMO
- Core Essential (HMO)
- Aetna Managed Choice (POS)
- Aetna Medicare Advantage PFFS Plan
- United Healthcare Options (PPO)
- Cigna Alliance Medicare (HMO)
- Johns Hopkins Advantage MD PLUS PPO
- Anthem Federal Employee Program Standard
- CareFirst BlueChoice HMO
- Kaiser Permanente Signature
- Anthem BCBS Medi Blue Plus
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- Options PPO Cardiac Global
- Coventry Health Care of Virginia
- United Healthcare Community Plan - VA Medicaid MCO
- IH-POS Plus
- HealthyBlue PPO
- MultiPlan, Inc
- United Healthcare Select Plus (POS)
- TriWest Healthcare Alliance
- Anthem BCBS of VA HealthKeepers (HMO)
- Priority Partners - Maryland Health Choice
- Magellan Complete Care of VA - VA Medicaid MCO
- MedStar Family Choice DC Healthy Families
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- CareFirst EPO
- CareFirst Group Medicare Advantage
- CareFirst Blue Preferred PPO
- Choice Care Network/HUMANA (PPO)
- First Health PPO
- Erickson Advantage Plans
- IH-Open HMO Option
- HumanaChoice PPO
- Choice Fund PPO
- Tricare Reserve Select
- Aetna Better Health of MD
- IH-Network Only Plus
- First Health PPO
- Optima Family Care MCO - VA Medicaid MCO
- UnitedHealthcare and AARP Medicare Complete Plans
- United Medicare Private Fee-for-Service (PFFS) plans
- NYC Medicare Advantage Plus
- CareFirst Blue Card Program
- UnitedHealthcare Medicare Adv. Special Needs Plans
- Geisinger Medicare Advantage
- Coventry of Delaware HMO/PPO
- Kaiser Permanente Medicare Advantage Signature and Select
- Sentara Health
- AmeriHealth Caritas DC Healthcare Alliance
- CareFirst MedStar PPO
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- Blue Choice Advantage
- AMERIVANTAGE/Amerigroup Community Care
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- Humana Medicare Advantage - HMO Open Access
- Kaiser Permanente Signature - Added Choice
- CareFirst Federal Employee Program (Std. & Basic PPO)
- CIGNA Connect EPO
- Aetna Classic 5000PD
- Select HMO/HealthFund/Health Network
- United Student Resources
- Network OA
- UnitedHealthcare Individual Exchange Plans
- United HealthCare Community Plan - Maryland Health Choice Program
- IH-Open POS II
- HumanaChoice Honor's plan PPO
- M.D. IPA Preferred (POS)
- UHC Passport
- Private Fee-for-Service Plans (PFFS)
- Lasso Healthcare - Medicare Medical Savings Account
- IH-PPO
- IH-Indemnity
- Amerigroup DC Healthy Families
- Jai Medical Systems - Maryland Health Choice
- Kaiser Permanente Select - Added Choice
- Anthem Federal Employee Program Basic
- CareFirst (NCA) Indemnity
- Johns Hopkins Advantage MD PPO
- Kaiser Permanente Flexible Choice POS Cardiac Global
- IH-Open POS Plus
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- United Healthcare Choice
- Police and Fire Clinic
- Aetna Advantage 5750
- Aetna Worker's Compensation Network
- CareFirst Maryland Point of Service Plan
- CareFirst Dual Prime HMO-SNP
- M.D. IPA (HMO)
- Mamsi Life & Health (Indem./PPO)
- Aetna Premier 200PD
- Aetna Medicare Advantage HMO & PPO Plans
- Aetna Student Health Insurance
- United Healthcare Choice Plus
- Kaiser Permanente Select Cardiac Global
- CIGNA PPO
- MedStar Family Choice DC Healthcare Alliance
- United Healthcare Select HMO - EPO/NPP
- AmeriHealth Caritas DC Healthy Families
- CareFirst Blue Choice Opt Out Open Access
- WellPoint Maryland - Maryland Health Choice
- Cigna TotalCare (HMO D-SNP)
- United Healthcare Choice Cardiac Global
- CareFirst FEP Blue Focus
- TRICARE East Select
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- Anthem BCBS Medi Blue SNP
- TRICARE for Life East
- Aetna Classic 3500
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- United Healthcare Choice Plus Cardiac Global
- Choice POS
- CareFirst MedStar Select PPO
- Aetna Advantage 6350
- Aetna Quality Point of Service (POS)
- CareFirst Maryland Indemnity or PPO
- TRICARE East Prime
- OCI Direct (HMO)
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- Aetna Signature Administrator PPO/TPA
- IH-Open Network Only Plus
- Humana Gold Plus HMO
- Healthy Blue (HMO, POS)
- Private Health Care Systems (PPO)
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- CIGNA HMO & Network (HMO)
- Great-West Healthcare POS/CIGNA
- IH-EPO Plus
- Uniformed Services Family Health Plan
- HighMark
- MedStar Family Choice - Maryland Health Choice
- Choice POS II
- Aetna Traditional Choice (PPO)
- CIGNA EPO
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- CareFirst Administrators
- CareFirst Community Health Plan of MD
- CIGNA POS/Network POS
- Cigna Preferred Medicare (HMO)
- Anthem BCBS Medi Blue Dual Adv
- Medicare Advantage - Advantra Value (PPO)
- Kaiser Permanente Flexible Choice 3-tier POS
- Aetna Open Choice (PPO)
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- United Healthcare Navigate Cardiac Global
- IH-HMO
- Health Services for Children with Special Needs
- Navigate
- Kaiser Permanente HMO Plus and DHMO Plus Member
- IH-Open EPO Plus
- Aetna Elect Choice/ Open Access (POS)
- Optimum Choice Preferred (POS)
- Coventry Health Care National Network PPO
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- Aetna Classic 5000
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- Kaiser Permanente Medicare Plus
- IH-POS
- Kaiser Maryland Medicaid MCO
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- Amerigroup DC Alliance
- Anthem BCBS of VA HealthKeepers Plus
- Kaiser Permanente Select
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- Medicare Direct
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- Aetna Basic
- Aetna Managed Choice Open Access (POS)
- Cigna True Choice Plus Medicare (PPO)
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- Aetna Advantage 6350PD
- Aetna HMO
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- Choice POS II Open Access
- Optimum Choice
- CIGNA SureFit (HMO)
- Medicare FFS
- Humana Medicare Advantage - PPO
- Aetna VA Exchange
- Maryland Physicians Care MCO
- CIGNA PPO Plus
Videos
Education
Board Certification: American Board of Internal Medicine, Gastroenterology
Fellowship: Georgetown University School of Medicine GME (2010)
Residency: UCLA-Olive View Medical Center-GME (2007)
Medical School: Virginia Commonwealth University Medical School (2004)
Awards
- Fellow of the Crohn’s & Colitis Foundation (FCCF), 2024
Northern Virginia Top Doctor, 2021
Washingtonian Top Doctor Award since 2021
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