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Dr. Mark Lowenheim, MD

Port Jefferson, NY

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Lowenheim, Pediatric Gastroenterologist in Port Jefferson, NY?

    Dr. Mark Lowenheim, MD is a Pediatric Gastroenterologist, who primarily practices in Port Jefferson, NY. He is board certified. Dr. Lowenheim is fluent in English, and is currently seeing new patients. Dr. Lowenheim’s practice accepts UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Lowenheim’s office at (631) 403-4507.

    What are Areas of Expertise for Dr. Lowenheim?

    Dr. Mark Lowenheim, MD is a highly-rated, board-certified Pediatric Gastroenterologist known for expertly diagnosing, treating, and managing a wide array of related conditions or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Lowenheim empowers patients to confidently navigate their health journey, specializing in Inflammatory Bowel Disease/Crohn's, Nutrition, or comprehensive wellness support. Serving the Port Jefferson/NY community, Dr. Lowenheim is dedicated to enhancing lives through expert, patient-centered care.

    What languages does Dr. Lowenheim speak?

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

    • English

    What conditions does Dr. Lowenheim treat?

    As a Pediatric Gastroenterologist, Dr. Lowenheim 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. Lowenheim. 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:

    • 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:

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

    ICD-10 Codes:

    • R197: Diarrhea, unspecified

    Also known as:

    • Exposure to COVID-19
    • COVID-19 (Coronavirus Disease 2019)
    • COVID-19 contact
    • Suspected coronavirus exposure
    • SARS-CoV-2 exposure

    ICD-10 Codes:

    • Z20822: Contact with and (suspected) exposure to COVID-19

    Also known as:

    • Belly Button Pain
    • Abdominal Pain
    • Pain around navel
    • Periumbilical discomfort
    • Umbilical pain

    ICD-10 Codes:

    • R1033: Periumbilical pain

    Also known as:

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

    ICD-10 Codes:

    • K5900: Constipation, unspecified

    Which procedures does Dr. Lowenheim perform as a Pediatric Gastroenterologist?

    Does Dr. Lowenheim accept my insurance?

    Dr. Lowenheim accepts most major insurance plans. Important: Please call our office at (631) 403-4507 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Lowenheim accept in Port Jefferson, NY?

    Dr. Lowenheim in Port Jefferson, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • All Other Third Party

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • Service Employees International Union (SEIU)

    • State of Ohio

    • UnitedHealthcare

    View All Insurances

    Where is Dr. Lowenheim's office located?

    Dr. Mark Lowenheim's Primary Practice

    200 Belle Terre Rd Ste 400

    Port Jefferson, NY 11777

    (631) 403-4507

    Get Directions

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

    Dr. Lowenheim's National Provider Identifier (NPI) number is 1285676429.

    What common questions do patients ask about Dr. Lowenheim?

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

    What is Dr. Mark Lowenheim's specialty?

    Dr. Lowenheim is a Pediatric Gastroenterologist near Port Jefferson, NY. A pediatrician specializing in diagnosing and treating digestive system diseases in infants, children, and adolescents. This expert manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice and is skilled in performing complex diagnostic and therapeutic procedures using endoscopic techniques to visualize internal organs. Contact Dr. Lowenheim to book an appointment today.

    Is this Dr. Mark Lowenheim affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Lowenheim is affiliated with Mather Hospital 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 Pediatric Gastroenterologist?

    Explore Pediatric 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 Lowenheim accepting new patients in Port Jefferson, NY?

    Yes, Dr. Mark Lowenheim is accepting new patients at this time.

    Does Dr. Mark Lowenheim offer online booking?

    Please contact Dr. Lowenheim's office at (631) 403-4507 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Mark Lowenheim?

    Please contact Dr. Lowenheim's office at (631) 403-4507 for information regarding telehealth appointment availability or for scheduling assistance.

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