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Andrew T. Marshall, MD

Andrew T. Marshall, MD

Optum Provider

Specialty

Gastroenterology

Languages

English

Seeing patients at

Monday 7:00 AM - 5:00 PM
Tuesday 7:00 AM - 5:00 PM
Wednesday 7:00 AM - 4:00 PM
Thursday 7:00 AM - 5:00 PM
Friday 7:00 AM - 4:00 PM
Saturday 7:00 AM - 1:00 PM
Sunday Closed
Hours may vary, please contact to schedule and confirm appointment availability.

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.8

43 reviews

  • Apr 27, 2026
    Verified Review

    Very thorough.

  • Apr 15, 2026
    Verified Review

    This Doctor is amazing! Professional! Attentive to your need.

  • Apr 9, 2026
    Verified Review

    Dr Marshall shows concern, listens to my concerns and gives honest feedback.

  • Mar 26, 2026
    Verified Review

    He is 100% committed to treating me with compassion and professionalism. He is a no nonsense doctor that performs the gastrointestinal procedures seamlessly. I trust him explicitly

  • Mar 26, 2026
    Verified Review

    Compassionate thorough doctor

  • Mar 25, 2026
    Verified Review

    Personal and appointments are followed Basically very little waiting time in reception area

  • Mar 22, 2026
    Verified Review

    Extremely competent.

  • Mar 18, 2026
    Verified Review

    Dr. Marshall is always wonderful!

  • Mar 18, 2026
    Verified Review

    Compassionate, knowledgeable and explains things thoroughly.

  • Feb 26, 2026
    Verified Review

    Calming, doesn’t rush the patient out, answered all questions or concerns

  • Feb 20, 2026
    Verified Review

    Dr Marshall is very thorough and responsive, a good diagnostician.

  • Feb 14, 2026
    Verified Review

    He’s efficient, courteous , caring and extremely thorough

  • Feb 10, 2026
    Verified Review

    Always very professional and pleasant to deal with

  • Feb 5, 2026
    Verified Review

    Takes time and interest to listen to all my concerns with my well being

  • Feb 2, 2026
    Verified Review

    He is very thorough

  • Jan 17, 2026
    Verified Review

    Very friendly and knowledable

  • Jan 14, 2026
    Verified Review

    A trully knowledgable,empathetic but firm medical provider.

  • Jan 11, 2026
    Verified Review

    I find him compassionate and caring. But he has someone else call regarding test results, and if you have questions he doesn't get on the phone.

  • Jan 8, 2026
    Verified Review

    He is fantastic and cares about his patients

  • Jan 8, 2026
    Verified Review

    I'm very satisfied with Dr. Marshall as my physician for the past 30 years.

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  • About Andrew T. Marshall, MD

    Dr. Andrew T. Marshall is board certified in internal medicine and gastroenterology. He completed medical training at Emory University, Mount Sinai School of Medicine, and Harvard affiliated hospitals.

    Philosophy of care

    Dr. Marshall partners with patients to deliver thoughtful, comprehensive digestive and primary care.

    Gender

    Male

    Board certifications

    American Board of Internal Medicine

    Licenses

    NY, 193405

    Employed or contracted

    Employed

    Network Name

    ProHealth

    NPI

    1801846290

  • Insurance Accepted

    This list is for informational purposes only and may not reflect the most current plans accepted by the provider. Optum accepts most major health insurance plans. Please contact your insurance company to confirm your coverage, eligibility, and the provider's participation in your plan.

    • 1199
    • Aetna
    • Affinity
    • Anthem BCBS
    • CHN
    • Centivo
    • Cigna
    • Coventry
    • EmblemHealth
    • First Health
    • Humana
    • MagnaCare
    • Medicaid
    • Medicare
    • MultiPlan
    • NYSHIP
    • Northwell Direct
    • Oscar
    • Oxford
    • TRICARE
    • UHC
    • UMR
  • Medical School

    • Mount Sinai School Of Medicine Of New York University