John Lindsay Marshall, MD| Gastrointestinal Medical Oncology, Medical Oncology | MedStar Health
John Lindsay Marshall

John Lindsay Marshall, MD
Provider is directly employed by MedStar Health

4.9 out of 5 (352 reviews)

Specialties: Gastrointestinal Medical Oncology, Medical Oncology

Languages: English


About me

Chief, Hematology and Oncology
Professor of Medicine and Oncology
Director, Otto J Ruesch Center for the Cure of Gastrointestinal Cancers
Georgetown Lombardi Comprehensive Cancer Center 

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 cancer, with expertise in phase I, II, and III trial design, and has served as Principal Investigator for more than one hundred clinical trials throughout his career. While he has an interest in many areas of cancer research, his primary focus is on the use of precision medicine in treating cancer. Dr. Marshall has become an outspoken advocate for GI cancer patients and the importance of clinical research participation. In 2009, he established the Otto J Ruesch Center for the Cure of GI Cancers, an organization solely focused on improving the lives of GI cancer patients through innovative research, personalized medicine, and focused advocacy. In 2015, Dr. Marshall both established and directed the Precision Oncology Alliance, a national alliance established to study the impact of molecular profiling on cancer research, value, and outcomes. He currently is serving as the Oncology CMO for Indivumed, creating a global precision medicine research network.

Dr. Marshall's passion for medicine began at an early age when, at 14, he lost his mother to non-Hodgkin lymphoma and dedicated himself to becoming a doctor and helping find a cure for cancer. His deep care for his patients and his warm humor help Dr. Marshall develop strong doctor-patient relationships. He counts the relationships with his patients as one of the most gratifying parts of his job.

In 2006, he acquired the additional perspective of being a caregiver for a cancer patient as his wife, Liza, was diagnosed with an aggressive form of breast cancer and underwent nine months of treatment. In 2021, he and his wife published their first book, “Off Our Chests,” exploring the world of cancer medicine and the impact of a cancer diagnosis on patients, caregivers, and cancer professionals.

Dr. Marshall lives in Arlington, Virginia, with his wife.

About MedStar Georgetown Cancer Institute
MedStar Georgetown is part of the MedStar Georgetown Cancer Institute, which combines medical expertise, the latest therapies, and research across MedStar Health. Our research engine, the Georgetown Lombardi Comprehensive Cancer Center, is the only National Cancer Institute-designated comprehensive cancer center in the Washington, D.C., region. This partnership means we provide access to cutting-edge clinical trials and the latest breakthroughs in cancer care.

Clinical areas of focus

  • Colorectal Malignancy
  • Esophageal Cancer
  • Gastrointestinal (GI) Cancer
  • Gastrointestinal (GI) Stromal Tumors
  • Hepatoblastoma
  • Liver Cancer
  • Liver Metastases
  • Pancreas Cancer
  • Rectal Cancer
  • Small Bowel Cancer
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Conditions and procedures

Conditions I treat

  • Anal Cancer
  • Anorectal Cancer
  • Appendiceal Cancer
  • Bile Duct Mass
  • Carcinoid Of Stomach
  • Carcinoid Tumor
  • Carcinoid Tumor Of Pancreas
  • Cholangiocarcinoma
  • Colorectal Malignancy
  • Cystadenoma Of Pancreas
  • Esophageal Cancer
  • Gallbladder Cancer
  • Gastrin Secreting Tumor Of Pancreas
  • Gastroesophageal Junction Cancer
  • Gastrointestinal (GI) Cancer
  • Gastrointestinal (GI) Stromal Tumors
  • Hepatobiliary Malignancies
  • Hepatoblastoma
  • Insulinoma
  • Islet Cell Tumor
  • Liver Cancer
  • Liver Metastases
  • Lynch Syndrome
  • Malignant Carcinoid Tumor Of Colon
  • Malignant Neoplasm Of Pancreatic Duct
  • Malignant Rectal Neoplasm
  • Malignant Tumor Of Extrahepatic Bile Duct
  • Metastatic Colon Cancer
  • Neuroendocrine Tumors
  • Pancreas Cancer
  • Pancreas Head Cancer
  • Pancreas Tail Cancer
  • Pancreatic Mass
  • Pseudomyxoma Peritonei
  • Rectal Cancer
  • Rectal Carcinoma In Situ
  • Recurrent Colorectal Cancer
  • Small Bowel Cancer
  • Small Intestine Cancer
  • Stomach Cancer
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Procedures I perform

  • Biologic Therapy For Gastrointestinal Diseases
  • Cancer Chemotherapy
  • Cancer Immunotherapy
  • Chemoradiation
  • Colon Cancer Chemotherapy
  • Gastrointestinal (GI) Cancer Genomics
  • Liver Cancer Genomics
  • Pancreatic Cancer Genomics
  • Rectal Cancer Genomics
  • Stomach Cancer Genomics
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Practice locations

Distance from Change LocationEnter your Location

3800 Reservoir Road Northwest
Lombardi Cancer Center
Washington, DC, 20007


Fax 202-444-1229

Get Directions

miles away

Fax 202-444-1229


MedStar Health accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Health, please call your insurance company.

  • List of insurance plans we accept
    • Aetna HMO
    • Aetna Signature Administrator PPO/TPA
    • WellPoint Maryland - Maryland Health Choice
    • Aetna Managed Choice Open Access (POS)
    • Tricare East Select
    • Aetna HMO-Open Access/Select OA
    • United Erickson Advantage Plans
    • Cigna Choice Fund PPO
    • United Optimum Choice
    • Innovation Health: POS Plus
    • Aetna Traditional Choice (PPO)
    • WellPoint Maryland
    • Cigna True Choice Plus Medicare (PPO)
    • Cigna Network Open Access
    • Aetna Quality Point of Service (POS)
    • CareFirst Administrators
    • Private Health Care Systems (PHCS) (PPO)
    • Cigna HMO Open Access
    • Kaiser Medicare Plus
    • UnitedHealthcare Individual Exchange Plans
    • Cigna POS Open Access & Open Access Plus
    • Aetna Select HMO/HealthFund/Health Network
    • United Nursing Home Plan (C-SNP
    • MedStar Family Choice DC Healthy Families
    • Veterans Affairs Community Care Network
    • CareFirst Blue Card Program (Out-of-area BCBS plans)
    • United Student Resources
    • Cigna PPO and PPO Plus
    • Aetna Choice POS & Choice POS II
    • Kaiser Flexible Choice
    • Traditional Medicare Fee for Service
    • CareFirst BC/BS Advantage Core/Enhanced
    • Carefirst BlueChoice Open Access
    • Cigna HMO & Network (HMO)
    • D-SNP)
    • Cigna EPO
    • Kaiser HMO Plus and DHMO Plus Member
    • United Optimum Choice Preferred (POS) & OCI Direct (HMO)
    • Aetna Managed Choice (POS)
    • Employee Health Plan (EHP)
    • Priority Partners - Maryland Health Choice
    • Kaiser Signature
    • Carefirst BlueChoice Opt Out Open Access
    • Cigna Indemnity
    • Beech Street PPO
    • Kaiser Permanente Signature-Added Choice
    • Police and Fire Clinic
    • CareFirst (NCA) Indemnity
    • Medicaid - Virginia
    • HumanaChoice PPO
    • Veterans Affairs Community Care Network (VA CCN)
    • Tricare for Life East
    • United Choice
    • MedStar Family Choice DC Healthcare Alliance
    • Aetna Elect Choice/ Open Access (POS)
    • Innovation Health: Open Network Only Plus
    • Medicaid - District of Columbia
    • Kaiser Medicare Advantage Signature and Select
    • Innovation Health: POS
    • Cigna TotalCare (HMO D-SNP)
    • Cigna True Choice Medicare (PPO)
    • Carefirst EPO
    • CareFirst Group Medicare Advantage
    • Aetna Open Choice (PPO)
    • Health Services for Children with Special Needs (HSCSN)
    • United Select HMO - EPO/NPP
    • Carefirst BlueChoice HMO
    • Cigna POS/Network POS
    • Aetna Medicare Advantage HMO & PPO Plans
    • United Options (PPO) (includes Empire PPO)
    • Cigna Achieve Medicare (HMO C-SNP)
    • Carefirst BlueChoice Opt Out Plus Open Access (POS)
    • Aetna Elect Choice/ EPO (Aetna Health Fund)
    • CareFirst MedStar Select PPO
    • Kaiser Select-Added Choice
    • United Core Essential (HMO)
    • Uniformed Services Family Health Plan (USFHP)
    • Virginia Premier
    • HumanaChoice Honor’s plan PPO
    • United Mamsi Life & Health
    • CareFirst Group Medicare Advantage prescription drug benefit (PPO)
    • United Community Plan - Maryland Health Choice Program
    • CareFirst MedStar PPO
    • Tricare East Prime
    • Aetna Open HMO/Open HMO Option/Open EPO Plus
    • Maryland Point of Service Plan (MPOS)
    • Medicaid - Maryland
    • Innovation Health: Indemnity
    • Carefirst Healthy Blue (HMO/POS)
    • Aetna Student Health Insurance
    • United MD IPA (HMO)
    • United AARP Medicare Complete
    • Carefirst Blue Preferred PPO
    • I-SNP
    • Innovation Health: HMO & EPO Plus
    • CareFirst Maryland Indemnity or PPO
    • United Group Medicare Advantage Plans
    • Cigna Alliance Medicare (HMO) |
    • Tricare Reserve Select
    • Kaiser Select
    • Innovation Health: Network Only Plus
    • Federal Employee Program (Std/Basic PPO/Blue Focus)
    • United Select Plus (POS)
    • Innovation Health: PPO
    • United MD IPA Preferred (POS)
    • Aetna HealthFund/Health Network Option OA
    • Innovation Health: Open POS II
    • United Golden Rule
    • Cigna Preferred Medicare
    • Innovation Health: Open POS Plus
    • United GEHA (for all other states) Compass Rose
    • HealthyBlue PPO
    • CareFirst NASCO
    • United Choice Plus
    • United Navigate
    • United Medicare Advantage DSNP District of Columbia
    • Coventry Health Care National Network PPO
    • Great-West Healthcare POS/CIGNA
    • Coventry Health Care of Virginia
    • First Health PPO
    • Coventry of Delaware HMO/PPO
    • MedStar Family Choice - Maryland Health Choice



Board Certification: American Board of Internal Medicine, Medical Oncology

Fellowship: Georgetown University-School Of Medicine (1993)

Residency: Georgetown University-School Of Medicine (1991)

Medical School: University of Louisville Department of Orthopaedic Surgery (1988)


  • 2008-present―Director, Otto J. Ruesch Center for the Cure of Gastrointestinal Cancers, Georgetown University
  • 1998-present—Director, Gastrointestinal Oncology, Georgetown Lombardi Comprehensive Cancer Center
  • 2020— Team Science Award, The Society for Immunotherapy of Cancer
  • 2019―Edward M. Kovach Cura Personalis Award, Georgetown University
  • 2019—Waun Ki Hong MD Memorial Lecture, Yonsei Song-dang Institute for Cancer Research, Seoul, Korea
  • 2017—Nobility in Science Award, National Pancreas Foundation
  • 2016―Educator of the Year Award, Physicians’ Education Resource®, LLC (PER®)
  • 2015-2019―Director, Caris Life Sciences, Precision Oncology Alliance
  • 2014-present—Founding director, GI Cancer Alliance Network
  • 2008-2019― America's Top Doctors for Cancer, Castle Connolly Medical Ltd
  • 2008-2009—President, International Society of GI Oncology
  • 2001―Gallo Award for Outstanding Clinical Research, The Cancer Institute of New Jersey
  • 1992―American Cancer Society Fellow

Ratings and reviews

  • Explanations the care provider gave you about your problem or condition

  • Extent to which the care provider listened to you

  • Care provider's discussion of any proposed treatment (options, risks, benefits, etc.)

  • Care provider's efforts to include you in decisions about your care

  • Concern the care provider showed for your questions or worries

  • Likelihood of recommending this care provider to others

  • Apr 11, 2024

    Dr Marshall is excellent and always addresses concerns!! Grateful gir his outstanding care!!

  • Apr 5, 2024

    Dr Marshall took time to explain my options completely and showed caring and compassion for my situation.

  • Apr 4, 2024

    Dr. Marshall is a caring and wonderful doctor. I have gotten excellent care.