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 ultasound (IUS), which he applies to advancing IBD patient care and research.
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
- Abdominal Pain
- Colonoscopy
- Constipation
- Diverticulitis
- EGD With Biopsy
- Flexible Colonoscopy With Biopsy
- Gastric Cancer
- Gastroenteritis
- Gastrointestinal Bleeding
- Inflammatory Bowel Disease
- Irritable Bowel Syndrome
- Sigmoidoscopy With Biopsy
- Ulcerative Colitis-Associated Arthritis Treatment
Conditions and procedures
Conditions I treat
- Abdominal Pain
- Abscess Of The Intestine
- Achalasia
- Acute Cholecystitis
- Acute Pancreatitis
- Alimentary Tract Foreign Body
- Anal Abscess
- Anal Fissures
- Anoscopy
- Anus And Rectum Diseases
- Aphagia
- Aphagia And Dysphagia
- Bacterial Food Poisoning
- Barrett's Esophagus
- Benign Neoplasm Of Colon, Rectum, Anus And Anal Canal
- Benign Neoplasm Of Digestive System
- Biliary Tract Disease
- Biliary Tract Obstruction
- Bowel Obstruction
- Celiac Disease
- Choledocholithiasis
- Chronic Constipation
- Chronic Diarrhea
- Colitis
- Colon Cancer
- Colon Disease
- Colon Polyps
- Colonic Diverticulosis
- Colonoscopy
- Colorectal Malignancy
- Constipation
- Crohn's Disease
- Crohn's Disease [Regional Enteritis]
- Diaphragmatic Hernia
- Digestive System Complications
- Digestive System Diseases
- Digestive System Symptoms
- Diseases Of Esophagus
- Diseases Of Stomach And Duodenum
- Diverticulitis
- Duodenal Ulcer
- Duodenitis
- Dysphagia
- Esophageal Cancer
- Esophageal Hernia
- Esophageal Stricture
- Esophagitis
- Flatulence
- Functional Dyspepsia
- Functional Intestinal Disorders
- Gallbladder Cancer
- Gallbladder Disease
- Gallstones
- Gastrectomy
- Gastric Cancer
- Gastric Varices
- Gastritis
- Gastroenteritis
- Gastroesophageal Reflux Disease
- Gastroesophageal Reflux Disease (GERD) In Children
- Gastrointestinal Bleeding
- Hemangioma
- Hemorrhoids
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Ileal Disease
- Inflammatory Bowel Disease
- Inflammatory Bowel Disease (IBD) With Infection
- Intestinal Infections
- Intestinal Parasites
- Intestinal Stenosis
- Irritable Bowel Syndrome
- Jaundice
- Liver Cirrhosis
- Liver Encephalopathy
- Liver Failure
- Liver Fibrosis
- Malabsorption
- Malignant Neuroendocrine Tumors
- Microscopic Colitis
- Nonalcoholic Fatty Liver Disease (NAFLD)
- Noninfective Gastroenteritis
- Pancreas Cancer
- Pancreatic Diseases
- Pancreatic Failure
- Pancreatic Pseudocyst
- Pancreatitis
- Paralytic Ileus And Intestinal Obstruction
- Peptic Ulcer Disease
- Perianal Fistula
- Perianal Itching
- Peripheral Vascular Disease Of The Intestines
- Polycystic Liver Disease
- Portal Hypertension
- Primary Sclerosing Cholangitis
- Primary Sclerosing Cholangitis (PSC)
- Proctitis
- Rectal Cancer
- Rectal Ulcers
- Small Intestine Cancer
- Stomach Cancer
- Stomach Diseases
- Stomach Ulcers
- Ulcerative Colitis
- Upper Gi Series
- Viral Hepatitis
- Vomiting And Nausea
- Vomiting Blood
Procedures I perform
- Capsule Endoscopy
- Celiac Disease Treatment
- Colonoscopy
- Colonoscopy Through Stoma With Biopsy
- Colonoscopy With Injection
- EGD With Biopsy
- Endoscopic Lower Esophagus Extraction
- Endoscopic Mucosal Resection
- Endoscopic Stomach Feeding Device Insertion
- Endoscopic Stricture Dilation
- Enteroscopy
- Enteroscopy With Bleeding Control
- Ercp (ENDOSCOPIC RETROGRADE CHOLANGIOPANCREATOGRAPHY)
- Esophageal Dilation
- Fecal Microbiota Preparation Instillation
- Fecal Microbiota Transplant
- Flexible Colonoscopy With Biopsy
- Gastroesophageal Reflux Disease
- Gastrointestinal Motility Study
- Gastrointestinal Stromal Tumor Follow-Up
- Gastrointestinal Tube Placement
- Helicobacter Pylori (H. PYLORI) Treatment
- Hepatitis E Treatment
- Hydrogen Breath Test
- Ileoscopy With Biopsy
- Inflammatory Bowel Disease
- Lower Gi Endoscopy
- Lower Gi Therapeutic Substance Introduction
- Pancreatitis Treatment
- Sigmoidoscopy With Biopsy
- Transrectal Ultrasound
- Ulcerative Colitis-Associated Arthritis Treatment
- Upper Gi Endoscopy
- Urea Breath Test
- Variceal Band Ligation
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
- Kaiser Permanente Signature - Added Choice
- CareFirst Federal Employee Program (Std. & Basic PPO)
- Erickson Advantage Plans
- Choice Care Network/HUMANA (PPO)
- Aetna Advantage 6350
- CareFirst Blue Preferred PPO
- IH-Open HMO Option
- United Healthcare Select HMO-EPO/NPP Cardiac Global
- Aetna Advantage 6350PD
- NYC Medicare Advantage Plus
- BCBS Out-of-State Medicare Plans (Blue Advantage)
- Alterwood Advanatge HMO & DSNP Plans
- TriWest Healthcare Alliance
- Optima Family Care MCO - VA Medicaid MCO
- Cigna Achieve Medicare (HMO C-SNP)
- IH-Network Only Plus
- Options PPO Cardiac Global
- CareFirst Group Medicare Advantage prescription drug benefit (PPO)
- Navigate
- Humana Gold Plus HMO
- First Health PPO
- CareFirst MedStar PPO
- Aetna Basic
- Private Health Care Systems (PPO)
- Choice Fund PPO
- IH-Open HMO
- UHC Group Medicare Advantage Plans (HMO, POS, PPO)
- United Healthcare Select HMO - EPO/NPP
- IH-EPO Plus
- Police and Fire Clinic
- WellPoint Maryland - Maryland Health Choice
- TRICARE for Life East
- DC/MD SHOP QHP Small Business Plans
- Cigna TotalCare (HMO D-SNP)
- Beech Street PPO
- United Healthcare Choice Plus Cardiac Global
- OCI Direct (HMO)
- Aetna Better Health of VA
- Mamsi Life & Health (Indem./PPO)
- Johns Hopkins Advantage MD PLUS PPO
- Johns Hopkins Advantage MD PPO
- IH-POS
- United Healthcare Choice Plus
- Kaiser Permanente Signature
- Great-West Healthcare POS/CIGNA
- Optimum Choice & Optimum Choice Preferred (POS) Cardiac Global
- CIGNA EPO
- Fee-for-Service (FFS) District of Columbia, Maryland and Virginia Medicaid
- Aetna Advantage 5750
- Kaiser Permanente Select
- Amerigroup DC Healthy Families
- M.D. IPA (HMO)
- HUMANA/Choice Care Medicare Plans (Choice, Gold Choice)
- Core Essential (HMO)
- Priority Partners - Maryland Health Choice
- Anthem BCBS Medi Blue SNP
- United Healthcare Community Plan - VA Medicaid MCO
- Lasso Healthcare - Medicare Medical Savings Account
- CareFirst Maryland Indemnity or PPO
- Aetna Student Health Insurance
- Maryland Physicians Care MCO
- Optimum Choice
- CareFirst FEP Blue Focus
- Kaiser Permanente Select - Added Choice
- MD IPA (HMO) & MD IPA Preferred Cardiac Global
- United Healthcare Choice
- IH-Open POS II
- United HealthCare Community Plan - Maryland Health Choice Program
- TRICARE East Select
- Kaiser Permanente Flexible Choice 3-tier POS
- CIGNA PPO
- CareFirst MedStar Select PPO
- Aetna Premier 200PD
- AMERIVANTAGE/Amerigroup Community Care
- Aetna Signature Administrator PPO/TPA
- Anthem BCBS of VA HealthKeepers (POS & POS OA)
- CIGNA HMO & Network (HMO)
- Uniformed Services Family Health Plan
- Johns Hopkins Advantage MD HMO
- CareFirst Group Medicare Advantage
- Anthem BCBS of VA Key Care POS/PPO/Indemnity
- CareFirst BlueChoice HMO
- Jai Medical Systems - Maryland Health Choice
- Anthem Federal Employee Program Basic
- Choice POS II Open Access
- CIGNA HMO Open Access
- Anthem BCBS Medi Blue Dual Adv
- Aetna Better Health of MD
- Geisinger Medicare Advantage
- MedStar Family Choice DC Healthy Families
- Tricare Reserve Select
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- CareFirst EPO
- CareFirst Dual Prime HMO-SNP
- CareFirst BlueCross BlueShield Advantage Core/Enhanced
- UnitedHealthcare and AARP Medicare Complete Plans
- United Healthcare Navigate Cardiac Global
- Mamsi Life & Health (Indem./PPO) Cardiac Global
- Healthy Blue (HMO, POS)
- Sentara Health
- CIGNA PPO Plus
- Amerigroup DC Alliance
- Coventry Health Care of Virginia
- HighMark
- IH-HMO
- Aetna Classic 5000PD
- Aetna VA Exchange
- CIGNA POS/Network POS
- POS OA
- CareFirst Blue Choice Opt Out Open Access
- IH-POS Plus
- Optimum Choice Preferred (POS)
- Choice POS
- Aetna Open Choice (PPO)
- MedStar Family Choice - Maryland Health Choice
- IH-Open EPO Plus
- CareFirst Administrators
- Anthem BCBS of VA HealthKeepers (HMO)
- Choice POS II
- IH-PPO
- Medicare Advantage - Advantra Value (PPO)
- Veterans Affairs Community Care Network
- M.D. IPA Preferred (POS)
- Anthem Federal Employee Program Standard
- CareFirst Maryland Point of Service Plan
- HumanaChoice PPO
- CareFirst NASCO
- Aetna Medicare Advantage HMO & PPO Plans
- MedStar Family Choice DC Healthcare Alliance
- Select HMO/HealthFund/Health Network
- Kaiser Permaenete Signature - Added Choice Cardiac Global
- UnitedHealthcare Medicare Adv. Special Needs Plans
- IH-Open Network Only Plus
- UnitedHealthcare Medicare Advantage DSNP District of Columbia
- CareFirst Community Health Plan of MD
- Coventry Health Care National Network PPO
- Aetna Elect Choice/ Open Access (POS)
- BCBS of Michigan (BCN Advantage,Security Blue, Freedom, Medicare PLUS Blue Group PPO)
- BlueChoice Open Access
- Aetna Quality Point of Service (POS)
- CIGNA SureFit (HMO)
- AmeriHealth Caritas DC Healthcare Alliance
- IH-Indemnity
- UHC Passport
- First Health PPO
- CareFirst Blue Choice Opt Out Plus Open Access (POS)
- MultiPlan, Inc
- Kaiser Permanente Medicare Plus
- CareFirst Blue Card Program
- Coventry of Delaware HMO/PPO
- United Healthcare Choice Cardiac Global
- Magellan Complete Care of VA - VA Medicaid MCO
- Aetna Medicare Advantage PFFS Plan
- CareFirst (NCA) Indemnity
- Health Services for Children with Special Needs
- Cigna True Choice Plus Medicare (PPO)
- Kaiser Permanente Medicare Advantage Signature and Select
- United Student Resources
- Aetna Classic 3500
- Aetna Managed Choice Open Access (POS)
- Aetna Elect Choice/ EPO (Aetna Health Fund)
- CIGNA Indemnity
- Medicare FFS
- Kaiser Permanente Select Cardiac Global
- Aetna Traditional Choice (PPO)
- AmeriHealth Caritas DC Healthy Families
- Anthem BCBS of VA HealthKeepers Plus
- Cigna Alliance Medicare (HMO)
- Aetna Managed Choice (POS)
- Kaiser Permanente HMO Plus and DHMO Plus Member
- Aetna Classic 5000
- Cigna True Choice Medicare (PPO)
- Medicare Direct
- Private Fee-for-Service Plans (PFFS)
- HealthyBlue PPO
- Humana Medicare Advantage - HMO Open Access
- Network OA
- Anthem BCBS Medi Blue Plus
- Humana Medicare Advantage - PPO
- TRICARE East Prime
- Kaiser Permanente Flexible Choice POS Cardiac Global
- UnitedHealthcare Individual Exchange Plans
- United Healthcare Select Plus (POS)
- CIGNA Connect EPO
- Advantra Platinum (PPO)
- Blue Choice Advantage
- HumanaChoice Honor's plan PPO
- Aetna Worker's Compensation Network
- IH-Open POS Plus
- Kaiser Maryland Medicaid MCO
- OA Plus
- Aetna HMO
- United Healthcare Options (PPO)
- Cigna Preferred Medicare (HMO)
- Employee Health Plan
- United Medicare Private Fee-for-Service (PFFS) plans
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