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 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 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
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
- CareFirst Federal Employee Program (Std. & Basic PPO)
- CIGNA POS/Network POS
- Coventry of Delaware HMO/PPO
- Anthem BCBS Medi Blue SNP
- POS OA
- Lasso Healthcare - Medicare Medical Savings Account
- Aetna Advantage 6350PD
- CareFirst (NCA) Indemnity
- Cigna True Choice Plus Medicare (PPO)
- Health Services for Children with Special Needs
- NYC Medicare Advantage Plus
- TriWest Healthcare Alliance
- Choice POS
- Maryland Physicians Care MCO
- CareFirst FEP Blue Focus
- Optimum Choice
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- IH-Open EPO Plus
- Aetna Managed Choice Open Access (POS)
- Humana Gold Plus HMO
- Anthem BCBS of VA HealthKeepers (HMO)
- Medicare FFS
- IH-Open POS II
- IH-PPO
- CIGNA PPO
- Aetna Premier 200PD
- Aetna Signature Administrator PPO/TPA
- HumanaChoice PPO
- United Healthcare Select HMO - EPO/NPP
- Medicare Direct
- Select HMO/HealthFund/Health Network
- Police and Fire Clinic
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- TRICARE for Life East
- Anthem Federal Employee Program Basic
- OCI Direct (HMO)
- CIGNA HMO Open Access
- UnitedHealthcare Individual Exchange Plans
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- United Healthcare Select Plus (POS)
- HumanaChoice Honor's plan PPO
- CIGNA EPO
- IH-Open POS Plus
- Healthy Blue (HMO, POS)
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- OA Plus
- Amerigroup DC Alliance
- Kaiser Permanente Select
- Aetna VA Exchange
- Kaiser Permanente Signature - Added Choice
- United Healthcare Choice Cardiac Global
- Priority Partners - Maryland Health Choice
- Aetna Medicare Advantage PFFS Plan
- Magellan Complete Care of VA - VA Medicaid MCO
- IH-Open HMO Option
- IH-POS Plus
- CareFirst Blue Choice Opt Out Open Access
- Optima Family Care MCO - VA Medicaid MCO
- Aetna Classic 3500
- Cigna Achieve Medicare (HMO C-SNP)
- Aetna Open Choice (PPO)
- MedStar Family Choice - Maryland Health Choice
- Navigate
- CareFirst MedStar PPO
- Kaiser Permanente Select - Added Choice
- Aetna Basic
- Aetna Traditional Choice (PPO)
- United HealthCare Community Plan - Maryland Health Choice Program
- Private Health Care Systems (PPO)
- IH-Open HMO
- Anthem BCBS of VA HealthKeepers Plus
- Choice Fund PPO
- M.D. IPA Preferred (POS)
- AMERIVANTAGE/Amerigroup Community Care
- Aetna Managed Choice (POS)
- CareFirst Maryland Point of Service Plan
- Cigna Alliance Medicare (HMO)
- CIGNA HMO & Network (HMO)
- Cigna True Choice Medicare (PPO)
- Aetna Medicare Advantage HMO & PPO Plans
- CareFirst NASCO
- HealthyBlue PPO
- CareFirst Group Medicare Advantage
- UnitedHealthcare Medicare Adv. Special Needs Plans
- DC/MD SHOP QHP Small Business Plans
- Network OA
- Humana Medicare Advantage - HMO Open Access
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- Beech Street PPO
- Cigna TotalCare (HMO D-SNP)
- TRICARE East Prime
- Kaiser Permanente Flexible Choice POS Cardiac Global
- United Healthcare Choice Plus Cardiac Global
- Anthem BCBS Medi Blue Dual Adv
- Tricare Reserve Select
- Johns Hopkins Advantage MD PPO
- MedStar Family Choice DC Healthy Families
- Geisinger Medicare Advantage
- Advantra Platinum (PPO)
- Aetna Elect Choice/ Open Access (POS)
- United Healthcare Choice Plus
- Aetna Worker's Compensation Network
- Great-West Healthcare POS/CIGNA
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- United Healthcare Navigate Cardiac Global
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- Aetna Advantage 5750
- First Health PPO
- Sentara Health
- Kaiser Maryland Medicaid MCO
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- Coventry Health Care of Virginia
- Cigna Preferred Medicare (HMO)
- United Healthcare Options (PPO)
- Employee Health Plan
- MultiPlan, Inc
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- Kaiser Permanente Medicare Plus
- United Medicare Private Fee-for-Service (PFFS) plans
- CareFirst Blue Card Program
- Aetna Advantage 6350
- Choice Care Network/HUMANA (PPO)
- Core Essential (HMO)
- Erickson Advantage Plans
- United Healthcare Community Plan - VA Medicaid MCO
- CareFirst Blue Preferred PPO
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- CareFirst Maryland Indemnity or PPO
- Alterwood Advanatge HMO & DSNP Plans
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- Kaiser Permanente Medicare Advantage Signature and Select
- Aetna Student Health Insurance
- Optimum Choice Preferred (POS)
- United Student Resources
- IH-Network Only Plus
- Options PPO Cardiac Global
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- Choice POS II
- CareFirst Administrators
- CIGNA Indemnity
- First Health PPO
- Kaiser Permanente Select Cardiac Global
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- United Healthcare Choice
- TRICARE East Select
- AmeriHealth Caritas DC Healthy Families
- Kaiser Permanente Flexible Choice 3-tier POS
- Medicare Advantage - Advantra Value (PPO)
- Anthem Federal Employee Program Standard
- CareFirst MedStar Select PPO
- Veterans Affairs Community Care Network
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- Aetna Classic 5000
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- Kaiser Permanente HMO Plus and DHMO Plus Member
- IH-EPO Plus
- Uniformed Services Family Health Plan
- Johns Hopkins Advantage MD HMO
- MedStar Family Choice DC Healthcare Alliance
- Private Fee-for-Service Plans (PFFS)
- IH-Open Network Only Plus
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- WellPoint Maryland - Maryland Health Choice
- Anthem BCBS Medi Blue Plus
- CareFirst BlueChoice HMO
- Choice POS II Open Access
- CareFirst Community Health Plan of MD
- Humana Medicare Advantage - PPO
- Jai Medical Systems - Maryland Health Choice
- Aetna Better Health of VA
- Aetna Better Health of MD
- Coventry Health Care National Network PPO
- IH-POS
- Johns Hopkins Advantage MD PLUS PPO
- Mamsi Life & Health (Indem./PPO)
- CIGNA Connect EPO
- Blue Choice Advantage
- CareFirst EPO
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- CareFirst Dual Prime HMO-SNP
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- Aetna Quality Point of Service (POS)
- BlueChoice Open Access
- Kaiser Permanente Signature
- UnitedHealthcare and AARP Medicare Complete Plans
- CIGNA SureFit (HMO)
- IH-Indemnity
- AmeriHealth Caritas DC Healthcare Alliance
- UHC Passport
- Amerigroup DC Healthy Families
- CIGNA PPO Plus
- Aetna HMO
- HighMark
- M.D. IPA (HMO)
- Aetna Classic 5000PD
- IH-HMO
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