MM
15 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Mattar, Gastroenterologist in Washington, DC?
Dr. Mark Mattar, MD is a Gastroenterologist, who primarily practices in Washington, DC with 2 additional practice locations. He has been practicing for over 15 years and is board certified. Dr. Mattar is fluent in English, Arabic, and Spanish, and is currently seeing new patients. Dr. Mattar’s practice accepts Cigna, Kaiser Permanente, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Mattar’s office at (202) 444-8541.
Is Dr. Mattar board certified as a Gastroenterologist?
Yes, Dr. Mark Mattar, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Mattar speak?
Dr. Mattar and their clinical team can communicate with patients in the following languages:
Arabic
English
Spanish
What conditions does Dr. Mattar treat?
As a Gastroenterologist, Dr. Mattar diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Mattar. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Crohn's Disease
- Crohn's Disease of the Small Intestine
- Crohn's Disease Affecting Small and Large Intestines
- Crohn’s Disease
- Regional Enteritis
- Inflammatory Bowel Disease (IBD)
- Terminal Ileitis
- Ileitis
- Panenteric Crohn's Disease
- Crohn's of Both Bowels', 'Generalized Crohn's Disease
ICD-10 Codes:
- K5090: Crohn's disease, unspecified, without complications
- K5000: Crohn's disease of small intestine without complications
- K5080: Crohn's disease of both small and large intestine without complications
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Ulcerative Colitis
- Ulcerative Pancolitis
- Colitis
- Inflammatory Bowel Disease (IBD)
- Chronic Colitis
- Chronic Pancolitis
- Extensive Ulcerative Colitis
ICD-10 Codes:
- K5190: Ulcerative colitis, unspecified, without complications
- K5100: Ulcerative (chronic) pancolitis without complications
Also known as:
- Routine Adult Health Checkup
- Health Checkup
- Adult physical exam
- Annual wellness visit for adults
- General adult medical exam
ICD-10 Codes:
- Z0000: Encounter for general adult medical examination without abnormal findings
What procedures does Dr. Mattar perform?
As a Gastroenterologist, Dr. Mattar performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Mattar. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly.
Also known as:
- Colonoscopy with Biopsy
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy with Tissue Removal
- Colonoscopy with Balloon Dilation
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Flexible colonoscopy with EMR
- Endoscopic mucosal resection (colon)
- Colon polyp removal during colonoscopy
- Flexible Colonoscopy with Dilation
- Colon Dilation during Colonoscopy
- Endoscopic Balloon Dilation of Colon
CPT Codes:
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 45390: Colonoscopy, flexible; with endoscopic mucosal resection
- 45386: Colonoscopy, flexible; with transendoscopic balloon dilation
Also known as:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Also known as:
- Diagnostic Upper Endoscopy with Biopsy
- Flexible Sigmoidoscopy with Biopsy
- Colonoscopy with Injections
- Colorectal Cancer Screening Tests
- Colonoscopy
- EGD with Biopsy
- Esophagogastroduodenoscopy
- Upper GI Endoscopy
- Stomach Scope with Sample
- Sigmoid Colon Scope with Biopsy
- Lower Endoscopy with Tissue Sample
- Flexible Sigmoidoscopy and Biopsy
- Rectum and Lower Colon Exam
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
CPT Codes:
- 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45331: Sigmoidoscopy, flexible; with biopsy, single or multiple
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
Also known as:
- Endoscopy and Biopsy of Small Intestine Pouch
- Kock pouch endoscopy
- Ileal reservoir evaluation
- Small bowel pouch biopsy
CPT Codes:
- 44386: Endoscopic evaluation of small intestinal pouch (eg, Kock pouch, ileal reservoir [S or J]); with biopsy, single or multiple
Also known as:
- Flexible Sigmoidoscopy
- Colorectal Cancer Screening Tests
- Sigmoidoscopy
- Lower colon exam
- Flexible colon scope
- Rectum and lower colon check
CPT Codes:
- 45330: Sigmoidoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Ileoscopy with Biopsy through Stoma
- Stoma Ileoscopy
- Small Bowel Scope with Biopsy
- Ileal Pouch Endoscopy
CPT Codes:
- 44382: Ileoscopy, through stoma; with biopsy, single or multiple
Does Dr. Mattar accept my insurance?
Dr. Mattar accepts most major insurance plans. Important: Please call our office at (202) 444-8541 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Mattar accept in Washington, DC?
Dr. Mattar in Washington, DC accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
BCBS Unspecified
Carefirst BlueCross BlueShield
Cigna
CVS Health (formerly Aetna)
Federal Employee Program
Medicare
State of Indiana
State of Tennessee
UnitedHealthcare
View All Insurances
Where is Dr. Mattar's office located?
Dr. Mark Mattar's Primary Practice
3800 Reservoir Rd NW
Washington, DC 20007
(202) 444-8541
What is Dr. Mattar's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Mattar's National Provider Identifier (NPI) number is 1841401031.
What common questions do patients ask about Dr. Mattar?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Mattar
What is Dr. Mark Mattar's specialty?
Dr. Mattar is a Gastroenterologist near Washington, DC. An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs. Contact Dr. Mattar to book an appointment today.
Is this Dr. Mark Mattar affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Mattar is affiliated with MedStar St. Mary's Hospital, MedStar Washington Hospital Center, Inova Fairfax Medical Campus which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Gastroenterologist?
Explore Gastroenterologist with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Mark Mattar accepting new patients in Washington, DC?
Yes, Dr. Mark Mattar is accepting new patients at this time.
Does Dr. Mark Mattar offer online booking?
Please contact Dr. Mattar's office at (202) 444-8541 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Mark Mattar?
Please contact Dr. Mattar's office at (202) 444-8541 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Mark Mattar have?
Dr. Mark Mattar is certified by the American Board of Internal Medicine.
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