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