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John L. Marshall, MD
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5 Patient Reviews
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Office Hours

  • Sun:12:00am - 12:00am
  • Mon:12:00am - 12:00am
  • Tue:12:00am - 12:00am
  • Wed:12:00am - 12:00am
  • Thu:12:00am - 12:00am
  • Fri:12:00am - 12:00am
  • Sat:12:00am - 12:00am

John L. Marshall, MD

Internal Medicine Physician - Hematology, Internal Medicine Physician - Gastroenterology

Biography

Dr. Marshall received his training at Duke University, the University of Louisville, and Georgetown University. Dr. Marshall is an internationally recognized expert in new drug development for GI canc… Read more ›

Featured Review See More Reviews

I am so very grateful to have Dr. Marshall as my oncologist. His thoughtfulness kindness and expertise is unparalleled!…

Anonymous

Summary

Provider Training

UniversityDegreeFocusGraduated
University of Louisville School of MedicineMedical Degree1988

InstitutionFocusYear
Residency - Georgetown University HospitalNot Specified

Photos

Provider Profile 0Provider Profile 1

Specialties

Languages Spoken
English
Medical Specialties
  • Internal Medicine Physician - Sub-Specialty: Hematology
  • Internal Medicine Physician - Sub-Specialty: Gastroenterology

Years In Practice: 31 (started in 1995)

Accepts New Patients: Yes

Payment Options

Payment Details

Reviews

Average Rating: 5
Number of Reviews: 5
Most Recent Review: 01/27/2026
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Office & Staff Evaluation Not rated

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Office Appearance & Atmosphere Not rated
Handling of Billing Matters Not rated
Average Wait Time Not Rated

Provider Evaluation

Listening Skills
Clear Explanations
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Verified Patient

“I am so very grateful to have Dr...”

I am so very grateful to have Dr. Marshall as my oncologist. His thoughtfulness kindness and expertise is unparalleled!

Anonymous 01/27/2026
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Verified Patient

“This was follow up appt and Dr M...”

This was follow up appt and Dr Marshall listened to our concerns and acted quickly to schedule scan on based on test results

Anonymous 10/25/2025
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Verified Patient

“He listened to my concerns...”

He listened to my concerns

Anonymous 09/10/2025
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Verified Patient

“Dr Marshall is very attentive an...”

Dr Marshall is very attentive and caring. I watched him take his own patients to the back, which as a nurse myself is amazing to see. I travel a long distance and he makes it worth it

Anonymous 12/18/2025
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Verified Patient

“Would recommend highly...”

Would recommend highly

Anonymous 09/18/2025

Locations

Affiliated Practices

Practice Colleagues

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Dr Robert Danner, MD   -   Internal Medicine Physician
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Kelly Johnson-Arbor, MD   -   Emergency Medicine Physician
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Joseph Roswarski, MD   -   Internal Medicine Physician
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Procedures & Services

Procedures & Treatments Offered

    Commonly Prescribed Medications

    John L. Marshall, MD has not yet listed the medications that he commonly prescribes.

    Accepted Insurance

    Accepted Insurance

    John L. Marshall, MD has not yet specified the insurance plans he accepts.
     

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