John Lindsay Marshall
NPI 1316935844ActiveIndividual· Internal Medicine, Hematology & Oncology· Washington, DC
Internal Medicine, Hematology & Oncology in Washington, District of Columbia, trained at University of Louisville School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $557,138 for 186 claims, against $41,512 paid for services in 2024. Taiho Oncology, Inc. was the largest of 7 companies reporting payments in 2025, $57,979 in all, mostly speaking and faculty fees.
Overview
| NPI | 1316935844 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Oct 10, 2005 |
| Last updated in NPPES | Mar 9, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 19655 | DC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 97 |
|---|---|
| Services billed | 381 across 11 procedure codes |
| Paid by Medicare | $41,512 |
Part D prescriptions in 2024
| Prescriptions (claims) | 186 · 213 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $557,138 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | University of Louisville School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Medstar Medical Group II LLCWashington, DC · 3,767 clinicians
- Suburban/Nrh Medical Rehabilitation IncBethesda, MD · 941 clinicians
Hospital affiliations
- Medstar Georgetown University HospitalWashington, DC
- Medstar Washington Hospital CenterWashington, DC
Industry payments (Open Payments)
- 2025$57,979 · 46 payments from 7 companies
- 2024$29,847 · 19 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Taiho Oncology, Inc. | $39,107 | 32 |
| Pfizer Inc. | $9,408 | 6 |
| Takeda Pharmaceuticals U.S.A., Inc. | $2,783 | 1 |
| Amgen Inc. | $2,683 | 2 |
| Glaxosmithkline, LLC. | $1,600 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$40,785 · 5 payments
- Consulting Fee$12,305 · 8 payments
- Travel and Lodging$4,449 · 24 payments
- Food and Beverage$438.79 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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