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
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
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
Practice locations
Distance from Change LocationEnter your Location
3800 Reservoir Road Northwest Lombardi Cancer Center Washington, DC, 20007
202-444-2223Fax 202-444-1229
Insurance
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.
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List of insurance plans we accept
- Cigna HealthSpring Medicare Advantage
- Aetna Better Health of Maryland
- UnitedHealthcare and AARP Medicare Complete Plans/ UHC Group Medicare Advantage Plans HMO, POS, PPO
- Blue Choice Advantage & Healthy Blue (HMO, POS)
- United Healthcare Options (PPO) (includes Empire PPO, GEHA, Compass Rose)
- UnitedHealthcare Medicare Adv/Special Needs Plans
- CFBCBS EPO
- Medicare Fee for Service
- UHC Community Plan of MD
- Kaiser Permanente Medicare Plus (Medicare Supplemental Plan)
- Kaiser Permanente Flexible Choice POS
- Kaiser MD Medicaid MCO
- Kaiser Permanente Select
- Kaiser Permanente Signature
- Kaiser Virginia Premier
- Kaiser PermanenteSelect-Added Choice
- Kaiser Permanente Signature-Added Choice
- CFBCBS Federal Employee Program (Std/Basic PPO/Blue Focus)
- Private Health Care Systems (PHCS) (PPO)
- M.D. IPA Preferred (POS)
- CIGNA POS/Network POS
- CIGNA HMO Open Access (OA)
- Innovation Health: POS
- United Healthcare Select HMO - EPO/NPP
- M.D. IPA (HMO)
- Aetna Medicare Advantage HMO & PPO Plans
- CFBCBS Maryland Indemnity or PPO
- CFBCBS Blue Choice Opt Out Open Access
- Coventry Health Care National Network PPO
- Great-West Healthcare POS/CIGNA
- CFBSBC Blue Preferred PPO
- Innovation Health: Indemnity
- Open POS II
- Open HMO
- Innovation Health: Open Network Only Plus
- United Healthcare Choice
- Coventry Health Care of Virginia
- Aetna Open Choice (PPO)
- CFBCBS BlueChoice HMO
- BlueChoice Open Access
- Innovation Health: PPO
- Innovation Health: Open POS Plus
- FIRST HEALTH
- Open EPO Plus
- Mamsi Life & Health (Indem./PPO)
- First Health PPO
- Aetna Elect Choice/ Open Access (POS)
- Innovation Health: POS Plus
- CIGNA HMO & Network (HMO)
- Aetna Traditional Choice (PPO)
- Choice Fund PPO
- HealthyBlue PPO
- Tricare Prime
- Optimum Choice Preferred (POS) & OCI Direct (HMO)
- CFBCBS Blue Choice Opt Out Plus Open Access (POS)
- PPO and PPO Plus
- CFBCBS Maryland Point of Service Plan (MPOS)
- Aetna Managed Choice Open Access (POS)
- POS OA & OA Plus
- Aetna Worker's Compensation Network
- Aetna Student Health Insurance
- CFBCBS (NCA) Indemnity
- CIGNA EPO
- Coventry of Delaware HMO/PPO
- Aetna Elect Choice/ EPO (Aetna Health Fund) Innovation Health: Network Only Plus
- CIGNA Indemnity
- Aetna HMO
- Aetna Innovations: HMO & EPO Plus
- Opoen HMO Option
- Select HMO/HealthFund/Health Network
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- Tricare for Life (Medicare Supplemental Plan)
- United Student Resources
- Network OA
- Choice POS & Choice POS II
- United Healthcare Choice Plus
- United Healthcare Select Plus (POS)
- Aetna Managed Choice (POS)
- MedStar Family Choice - Maryland Health Choice
- Aetna Quality Point of Service (POS)
- MedStar Select (MedStar Associates' Plan)
Videos
Education
Board Certification: American Board of Internal Medicine, Medical Oncology
Fellowship Program: MedStar Georgetown University Hospital (1993)
Residency Program: MedStar Georgetown University Hospital (1991)
Internship Program: MedStar Georgetown University Hospital (1989)
Medical School: University of Louisville (1988)
Awards
- 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