Mark Ewing Chisam, M.D.
NPI 1053381251ActiveIndividual· Radiology, Radiation Oncology· Williamsburg, VA
Radiology, Radiation Oncology (M.D.) in Williamsburg, Virginia, trained at Uniformed Services Uhs Fe Hebert School of Med (class of 1994). Mostly services rather than prescriptions: Medicare paid $94,175 for 102 patients in 2024, with only 11 Part D claims. Progenics Pharmaceuticals, Inc. reported $37.21 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1053381251 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 23, 2006 |
| Last updated in NPPES | Oct 3, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 0101054200 | VA |
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 - Radiation Oncology (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 102 |
|---|---|
| Services billed | 1,399 across 21 procedure codes |
| Paid by Medicare | $94,175 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11 · 15 30-day fills |
|---|---|
| Total drug cost | $134.59 |
Education and affiliations
| Medical school | Uniformed Services Uhs Fe Hebert School of Med |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Radiation Oncology |
Medical group
- Riverside Physician Services IncWilliamsburg, VA · 797 clinicians
Hospital affiliation
- Riverside Regional Medical CenterNewport News, VA
Industry payments (Open Payments)
- 2024$37.21 · 2 payments from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Progenics Pharmaceuticals, Inc. | $37.21 | 2 |
What the 2024 payments were for
- Food and Beverage$37.21 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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