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Dr. Mark Mattar, MD

Gastroenterology*
3.7 (18)
Map Pin Small Washington, DC
Accepting new patients
20 years of experience

Offers telehealth

Overview of Dr. Mark Mattar, MD

Dr. Mark Mattar, MD is a Gastroenterology Specialist in Washington, DC. They specialize in Gastroenterology, has 20 years of experience, and is board certified in Gastroenterology. They graduated from Virginia Commonwealth University School of Medicine and is affiliated with MedStar Georgetown University Hospital. Dr. Mattar, completed a residency at UCLA Olive View Program. Patients rated Dr. Mattar an average 3.7 star rating.

Dr. Mattar works at Dr Margaret B Marshall - MD in Washington, DC. They frequently treat conditions like Inflammatory Bowel Disease, Enteritis and Infectious Diarrheal Disease along with other conditions at varying frequencies. They are accepting new patients and accept Aetna, Anthem and Anthem Blue Cross Blue Shield as well as other major insurance plans. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

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These providers are on the medical staff of Reston Hospital Center
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Compare Dr. Mattar with our nearby Gastroenterology Specialists at Reston Hospital Center
These providers are on the medical staff of Reston Hospital Center.

Dr. Mattar's Office Locations

  1. 1
    Division of Gatroenterology
    3800 Reservoir Rd NW, Washington, DC 20007 Icon Directions Right Arrow Directions Phone Icon (202) 444-1039

Hospital Affiliations
Admitting Hospitals

Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.

  • MedStar Georgetown University Hospital

Experience & Treatment Frequency

NEW FEATURE

What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

Very HighFrequency
HighFrequency
NormalFrequency
May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Inflammatory Bowel Disease
Enteritis
Infectious Diarrheal Disease

Treatment frequency



Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Inflammatory Bowel Disease
Enteritis
Infectious Diarrheal Disease
Abdominal Pain
Anal or Rectal Pain
Anemia
  • View other providers who treat Anemia
Cholangitis
Colorectal Polyp
Constipation
Crohn's Disease
Diarrhea
  • View other providers who treat Diarrhea
Duodenitis
Gastrointestinal Bleeding
Hemorrhoids
Intestinal Diverticulosis
Intestinal Ulcer
Irritable Bowel Syndrome
Noninfectious Gastroenteritis and Colitis
Primary Sclerosing Cholangitis
Ulcerative Colitis
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Duodenal Polypectomy
Endoscopy (Esophagus, Stomach, Small Intestine)
ERCP (Endoscopic Retrograde Cholangiopancreatography)
Flexible Sigmoidoscopy
Manometry
Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
Rigid Proctosigmoidoscopy
Benign Neoplasm of the Digestive System
Bile Duct Obstruction
Celiac Disease
Chronic Anal Fissure
Chronic Gastritis
Colon Cancer
Colorectal Cancer
Congenital Anomaly Intestine
Dehydration
Diffuse Esophageal Spasm
Digestive Disorders
Diverticulitis
Diverticulosis
Dysentery
Eosinophilic Esophagitis
Esophageal Motility Disorders
Esophageal Ulcer
Familial Adenomatous Polyposis
Food Allergy
Gallstones
Gas-Bloat Syndrome
Gastrointestinal Malabsorption
Gastroptosis
Hemochromatosis
Hepatitis B
Hepatitis C
Hepatorenal Syndrome
Hernia
  • View other providers who treat Hernia
Hiatal Hernia
Ileus
  • View other providers who treat Ileus
Intestinal Diverticulitis
Intestinal Fistula
Intestinal Obstruction
Lactose Intolerance
Liver Damage from Alcohol
Liver Fluke
Mallory-Weiss Syndrome
Malnutrition
Megacolon
Mesenteric Panniculitis
Nausea
  • View other providers who treat Nausea
Non-Alcoholic Fatty Liver Disease
Non-Neonatal Jaundice
Pancreatitis
Pelvic Abscess
Peptic Ulcer
Pouchitis
Pyloric Stenosis
Rectal Diseases
Rectal Ulcer
Reflux Esophagitis
Retroperitoneum Cancer
Viral Hepatitis
Vitamin_Deficiency
Cancer Counseling
Colon Cancer Screening
Colonoscopy
Colonoscopy With Polypectomy
Colorectal Cancer Screening
Endoscopy
Gallbladder Scan
Hepatitis A Screening
Hepatitis B Virus Screening
Hepatitis C Virus Screening
Hepatitis Screening
Impedance Testing
Instrumental Diagnostic Evaluation for Dysphagia
Liver Function Test
Percutaneous Edoscopic Gastrostomy (PEG)
pH Probe
  • View other providers who treat pH Probe
Screening Colonoscopy
VAP Lipid Testing
Wireless pH Testing
Check your insurance
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    Please double-check when making an appointment.

    View All Accepted Carriers

    • Aetna
    • Anthem
    • Anthem Blue Cross Blue Shield
    • Blue Cross and Blue Shield of Oklahoma
    • Blue Cross Blue Shield
    • CareFirst Blue Cross Blue Shield
    • Cigna
    • First Health
    • MultiPlan

    * Please verify this information when scheduling an appointment.

    Ratings & Reviews
    Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.

    Learn more about how FindCare's ratings and reviews work

    3.7
    Average provider rating
    Based on 18 ratings
    Patient Ratings (18)
    5 Star
    (11)
    4 Star
    (1)
    3 Star
    (0)
    2 Star
    (1)
    1 Star
    (5)
    Leave a review

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    Dr. Mattar's Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. Mattar

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

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    About Dr. Mark Mattar, MD

    Specialties*
    • Gastroenterology

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Specialties*
    Years of Experience
    • 20 years of experience
    Years of Experience
    Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.

    Languages Spoken
    • English
    Languages Spoken
    NPI Number
    • 1841401031
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    Fellowship
    • Georgetown University Hospital
    Fellowship
    Residency
    • UCLA Olive View Program
    Residency
    Internship
    • UCLA Olive View Program
    Internship
    Medical Education
    • Virginia Commonwealth University School of Medicine
    Medical Education
    Board Certifications
    • Gastroenterology
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Frequently Asked Questions

    Dr. Mark Mattar, MD is accepting new patients on Healthline FindCare. You can check to see if Dr. Mattar is offering online scheduling or call the provider’s office for more information.

    Dr. Mattar has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    Dr. Mattar works at Dr Margaret B Marshall - MD in Washington, DC. View the full address on Dr. Mattar’s profile.

    Dr. Mattar has seen patients for Inflammatory Bowel Disease, Enteritis and Infectious Diarrheal Disease, and more. You can see other conditions treated by Dr. Mattar on their profile. Please call the provider’s office to confirm all visit reasons.

    18 patients have reviewed Dr. Mattar. The overall rating for this provider is 3.7. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Mattar.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. Mattar, there are benefits to both methods. A person calling to schedule an with Dr. Mattar appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

    Telehealth Options
    This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Mattar, or would you like to choose another provider and have an online appointment right now?
    Find provider online now
    Call now to make an appointment
    (202) 444-1039

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