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Dr. Ann Marie Stephenson Thomas, DO

Rockville, MD

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Stephenson Thomas, Gastroenterologist in Rockville, MD?

    Dr. Ann Marie Stephenson Thomas, DO is a Gastroenterologist, who primarily practices in Rockville, MD with 2 additional practice locations. She is board certified. Dr. Stephenson Thomas is fluent in English, and is currently seeing new patients. Dr. Stephenson Thomas’s practice accepts Cigna, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Stephenson Thomas’s office.

    What languages does Dr. Stephenson Thomas speak?

    Dr. Stephenson Thomas and their clinical team can communicate with patients in the following languages:

    • English

    What conditions does Dr. Stephenson Thomas treat?

    As a Gastroenterologist, Dr. Stephenson Thomas 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. Stephenson Thomas. 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:

    • 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:

    • Colon Polyps
    • Colonic Polyps
    • Colorectal Polyps
    • Intestinal Polyps
    • Bowel Polyps

    ICD-10 Codes:

    • Z86010: Personal history of colon polyps

    Also known as:

    • Acid Reflux
    • GERD
    • Acid Reflux (GER & GERD) in Adults
    • Acid Reflux (GER & GERD) in Children
    • Acid Reflux (GER & GERD) in Infants
    • Gastroesophageal Reflux
    • Heartburn
    • Indigestion

    ICD-10 Codes:

    • K219: Gastro-esophageal reflux disease without esophagitis

    Also known as:

    • Change in Bowel Habits
    • Abnormal Bowel Movements
    • Bowel Movement
    • Altered Bowel Habits
    • Irregular Bowel Movements
    • Changes in Pooping
    • Unusual stool
    • Changes in poop
    • Fecal changes

    ICD-10 Codes:

    • R194: Change in bowel habit
    • R195: Other fecal abnormalities

    Also known as:

    • Other Pre-Procedure Examination
    • Various pre-op checks
    • Miscellaneous pre-surgery exams
    • Other pre-treatment assessments

    ICD-10 Codes:

    • Z01818: Encounter for other preprocedural examination

    Also known as:

    • History of Adenomatous and Serrated Colon Polyps
    • Past Colon Polyps
    • Previous Adenomas
    • History of Precancerous Colon Growths

    ICD-10 Codes:

    • Z860101: Personal history of adenomatous and serrated colon polyps

    Also known as:

    • Upper Middle Abdominal Pain
    • Abdominal Pain
    • Epigastric pain
    • Pain below breastbone
    • Upper stomach pain

    ICD-10 Codes:

    • R1013: Epigastric pain

    Also known as:

    • Constipation
    • Difficulty Passing Stool
    • Infrequent Bowel Movements
    • Hard Stools

    ICD-10 Codes:

    • K5900: Constipation, unspecified

    Also known as:

    • Rectal Bleeding
    • Gastrointestinal Bleeding
    • Gastrointestinal (GI) Bleeding
    • Anal Bleeding
    • Blood in Stool
    • Lower GI Bleed

    ICD-10 Codes:

    • K625: Hemorrhage of anus and rectum

    Also known as:

    • Abdominal Bloating
    • Gas
    • Gas in the Digestive Tract
    • Bloated Stomach
    • Swollen Belly
    • Gaseous Distension

    ICD-10 Codes:

    • R140: Abdominal distension (gaseous)

    Also known as:

    • Iron Deficiency Anemia
    • Anemia
    • Iron
    • Anemia from Iron Lack
    • Low Iron Anemia
    • Sideropenic Anemia

    ICD-10 Codes:

    • D509: Iron deficiency anemia, unspecified

    Also known as:

    • Barrett's Esophagus
    • Esophagus Disorder
    • Barrett’s Esophagus
    • Barrett's condition
    • Esophageal metaplasia

    ICD-10 Codes:

    • K2270: Barrett's esophagus without dysplasia

    Also known as:

    • Irritable Bowel Syndrome (IBS)
    • Irritable Bowel Syndrome
    • Spastic Colon
    • Functional Bowel Disorder
    • IBS

    ICD-10 Codes:

    • K589: Irritable bowel syndrome, unspecified

    Also known as:

    • Heartburn
    • Acid Reflux
    • Indigestion
    • GERD Symptoms

    ICD-10 Codes:

    • R12: Heartburn

    Also known as:

    • Difficulty Swallowing
    • Swallowing Disorder
    • Dysphagia
    • Trouble swallowing
    • Painful swallowing

    ICD-10 Codes:

    • R1310: Dysphagia, unspecified

    Also known as:

    • Fatty Liver Disease
    • Liver Disease
    • Nonalcoholic Fatty Liver Disease (NAFLD) & NASH
    • Nonalcoholic Fatty Liver Disease & NASH in Children
    • NAFLD
    • NASH
    • Hepatic steatosis

    ICD-10 Codes:

    • K760: Fatty (change of) liver, not elsewhere classified

    Also known as:

    • Diarrhea
    • Loose stools
    • Runny poop
    • Frequent bowel movements

    ICD-10 Codes:

    • R197: Diarrhea, unspecified

    Also known as:

    • Family History of Digestive Organ Cancer
    • Cancer
    • Family History
    • Genetic risk for gastrointestinal cancer
    • Family history of GI cancer
    • Hereditary digestive cancer

    ICD-10 Codes:

    • Z800: Family history of malignant neoplasm of digestive organs

    Also known as:

    • Family History of Colon Polyps
    • Colonic Polyps
    • Family History
    • Genetic colon polyps
    • Hereditary bowel polyps
    • Inherited risk for colon polyps

    ICD-10 Codes:

    • Z8371: Family history of colonic polyps

    Which procedures does Dr. Stephenson Thomas perform as a Gastroenterologist?

    Does Dr. Stephenson Thomas accept my insurance?

    Dr. Stephenson Thomas accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Stephenson Thomas accept in Rockville, MD?

    Dr. Stephenson Thomas in Rockville, MD accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • All Other Third Party

    • Carefirst BlueCross BlueShield

    • ConnectiveRx

    • CVS Health (formerly Aetna)

    • Department of Defense / Tricare

    • Express Scripts

    • Federal Employee Program

    • Hennepin Health Plan (MN)

    • Medicare

    • UnitedHealthcare

    View All Insurances

    Where is Dr. Stephenson Thomas' office located?

    Dr. Ann Marie Stephenson Thomas' Primary Practice

    14955 Shady Grove Rd Ste 150

    Rockville, MD 20850

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    Dr. Ann Marie Stephenson Thomas' Practice 2

    9420 Key West Ave

    Potomac, MD 20850

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    Dr. Ann Marie Stephenson Thomas' Practice 3

    9420 Key West Ave Ste 202

    Rockville, MD 20850

    (301) 251-9555

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    What is Dr. Stephenson Thomas's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. Stephenson Thomas's National Provider Identifier (NPI) number is 1376742601.

    What common questions do patients ask about Dr. Stephenson Thomas?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Stephenson Thomas

    What is Dr. Ann Marie Stephenson Thomas's specialty?

    Dr. Stephenson Thomas is a Gastroenterologist near Rockville, MD. 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. Stephenson Thomas to book an appointment today.

    Is this Dr. Ann Marie Stephenson Thomas affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Stephenson Thomas is affiliated with Adventist Healthcare Shady Grove Medical Center which is a Castle Connolly Top Hospital. 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 Ann Marie Stephenson Thomas accepting new patients in Rockville, MD?

    Yes, Dr. Ann Marie Stephenson Thomas is accepting new patients at this time.

    Does Dr. Ann Marie Stephenson Thomas offer online booking?

    Please contact Dr. Stephenson Thomas's office for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Ann Marie Stephenson Thomas?

    Please contact Dr. Stephenson Thomas's office for information regarding telehealth appointment availability or for scheduling assistance.

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