Summary

Dr. John Marshall is a gastroenterology specialist with additional expertise in hematology and oncology. He earned his medical degree from the University of Louisville School of Medicine and completed his residency at Georgetown University Hospital. With 38 years of clinical experience, Dr. Marshall brings extensive knowledge to his practice. He provides care in English.

Dr. Marshall practices at MedStar Georgetown University Hospital in Washington, DC. His clinical focus includes treating liver cancer, colorectal cancer, and colon cancer. He also provides emergency care services. Patients have given him an average rating of 4.5 on Vitals, reflecting their confidence in his care.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.5
  • 38 years of experience
  • 23 insurance plans accepted
  • speaks English
  • Georgetown University Hospital
  • 24 written reviews
  • 1 award
  • 3 specialties
  • 16 areas of expertise
  • 1 board certification
  • 1 hospital affiliation
  • 1 office location
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Awards

  • Vitals Preferred Provider

    • Vitals Preferred Provider Award
      • Preferred Provider badge recognizes providers that are committed to transparency, responsiveness and great service to patients, and have earned a high patient satisfaction rating.

  • Click for our Methodology

Office Location

MedStar Georgetown University Hospital

3800 Reservoir Rd NwWashington, DC 20007
Mon12:01 am - 11:59 pm
Tue12:01 am - 11:59 pm
Wed12:01 am - 11:59 pm
Thu12:01 am - 11:59 pm
Fri12:01 am - 11:59 pm
Sat12:01 am - 11:59 pm
Sun12:01 am - 11:59 pm

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John L. Marshall, MD
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John L. Marshall, MDJoseph James Jennings, MDShandiz Shahbazi, MDBrooke Ann Spencer, FNPBC, MSN
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.5 
4.7 
4.5 
4.9 
38 Years of Experience 14 Years of Experience 8 Years of Experience 13 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English, Farsi Speaks English
Washington , DCMcLean , VAMcLean , VAMcLean , VA
Med School: University of Louisville School of Medicine Med School: Georgetown University Med School: Virginia Commonwealth University
Current Profile
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Insurance Plans Accepted by John L. Marshall

  • Accepts Medicaid
  • AARP
  • Aetna
  • AmeriHealth
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - Federal Employees Program
  • Blue Cross Blue Shield - PPO
  • CareFirst Blue Cross Blue Shield
  • CareFirst Blue Cross Blue Shield - HMO
  • CareFirst Blue Cross Blue Shield - PPO
  • Cigna
  • Healthlink
  • Highmark Blue Cross Blue Shield of Delaware
  • Highmark Blue Cross Blue Shield of Delaware - PPO
  • Humana
  • Kaiser Permanente
  • Medicaid
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicare
  • Tricare
  • UnitedHealthcare
  • UnitedHealthcare - ACA

Medical Specialties

John L. Marshall has the following 3 specialties

Specialty Expertise

John L. Marshall has the following 16 areas of expertise

  • Biological Therapy (Immunotherapy)
  • Blood Cancer
  • Bone Marrow Transplant
  • Cancer
  • Chemotherapy
  • Clinical Research
  • Epidemiology
  • Gastrointestinal Cancer
  • Hematology
  • Hepatocellular Carcinoma
  • Hodgkin's Lymphoma
  • Leukemia
  • Lymphoma
  • Myelofibrosis
  • Myeloma
  • Oncology

Certifications, License, & Education

38 Years Experience

John L. Marshall holds an active medical license in the state of District Of Columbia.

Medical License

Medical Doctor with an active medical license in the state of District Of Columbia that expires in 2027.

Education & Training

Residency

Completed their residency at Georgetown University Hospital.

Medical School

Graduated from University of Louisville School of Medicine in 1988.

NPI Number

John L. Marshall's NPI number is 1316935844.

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Frequently Asked Questions

Does John Marshall accept my insurance?
You can see the insurance plans that John Marshall accepts on their Vitals profile.
Is John Marshall accepting new patients?
John Marshall is accepting new patients on Vitals. View John Marshall's profile on Vitals to make an appointment.
Where is John Marshall's office located?
John Marshall's office is located at 3800 Reservoir Rd Nw, Washington, DC, 20007.
Does John Marshall accept virtual/telehealth appointments?
John Marshall has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
What languages does John Marshall speak?
John Marshall speaks English.

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