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