John Marshall is an Oncology physician affiliated with Georgetown University. ClinicalTrials.gov lists 17 registered studies matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Research metrics aren't shown for this record. Either we found no confident publication match for this name, or more than one physician shares the matched author record. We'd rather show nothing than someone else's numbers. Why? →
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
3800 Reservoir Rd NW
Washington, DC 200072113
Telephone
202-444-2223Registry record last updated 9 Mar 2012.
Clinical trials
- An Imaging Study in ER Negative Breast Cancer by Targeting αvβ6
Sponsor: Queen Mary University of London
- Role of Active Deresuscitation After Resuscitation:
Sponsor: Unity Health Toronto
- Evaluating Novel Therapies in ctDNA Positive GI Cancers
Sponsor: Georgetown University
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
26 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- TAIHO ONCOLOGY, INC.Program year202532 payments$39,107openpaymentsdata.cms.gov ↗
- PFIZER INC.Program year20256 payments
- Takeda Pharmaceuticals U.S.A., Inc.Program year20251 payment
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Nervous system
47%Opioid Agonist18%Oxycodone Hcl100%Part D<11 patientsBenzodiazepine16%Lorazepam100%Part D<11 patients+ 1 more class in this area
Cancer & immunology
30%Nucleoside Analog Antiviral15%Lonsurf100%Part D<11 patientsPoly(ADP-Ribose) Polymerase Inhibitor15%Lynparza100%Part D<11 patientsMetabolism & gastrointestinal
12%Serotonin-3 Receptor Antagonist12%Ondansetron Hcl100%Part D<11 patients
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
NIH funding
6 NIH research awards on record, funded 1996–2009 per NIH RePORTER. The latest:
- CLINICAL TRIAL: PHASE 1 CLINICAL TRIAL OF DAILY ORAL GLEEVE AND ONE HOUR WEEKLY
Georgetown University
FY2009$24,172M01RR023942 - CLINICAL TRIAL: PHASE 1 CLINICAL TRIAL OF DAILY ORAL GLEEVE AND ONE HOUR WEEKLY
Georgetown University
FY2008$99,168M01RR023942 - A PHASE I OPEN LABEL SAFETY AND PHARMACOKINETIC STUDY OF SGT-53
Georgetown University
FY2008$1,428M01RR023942
Awards in the NIH RePORTER records where a principal investigator name matches this physician at an organization in their practice state. Latest award years shown; each row links to the project record on RePORTER.
Similar KOLs
Other experts from the same institution or the same specialty.
Augusto Pichard, MD
Georgetown University
Virginia Steen
Georgetown University
Joseph Verbalis
Georgetown University
Craig Kessler
Georgetown University
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments — shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”