Thomas M. Masterson, MD
NPI 1649224643ActiveIndividual· Internal Medicine· Clinton, MD
Internal Medicine (MD) in Clinton, Maryland, trained at University of Virginia School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $1,594,840 for 15,538 claims, against $249,249 paid for services in 2024. Acadia Pharmaceuticals Inc reported $119.72 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1649224643 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 22, 2006 |
| Last updated in NPPES | Sep 30, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D50534 | MD |
| Internal Medicine | 207R00000X | 0101038350 | 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 - Internal Medicine (DC); Practitioner - Internal Medicine (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 835 |
|---|---|
| Services billed | 3,536 across 10 procedure codes |
| Paid by Medicare | $249,249 |
Part D prescriptions in 2024
| Prescriptions (claims) | 15,538 · 15,614 30-day fills |
|---|---|
| Patients | 600 |
| Total drug cost | $1,594,840 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Virginia School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Internal Medicine |
Medical group
- M Medical Group IncWashington, DC · 106 clinicians
Hospital affiliations
- Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD
- Medstar Washington Hospital CenterWashington, DC
- University of MD Capital Region Medical CenterUpper Marlboro, MD
Other facilities
- Amedisys HospiceHospice · Largo, MD
- Gilchrist Hospice Care, IncHospice · Hunt Valley, MD
- Crescent Cities Nursing & Rehabilitation CenterNursing home · Riverdale, MD
- Encore at Turf ValleyNursing home · Ellicott City, MD
- Future Care Capital RegionNursing home · Landover, MD
- Future Care PineviewNursing home · Clinton, MD
- Layhill Nursing and Rehabilitation CenterNursing home · Silver Spring, MD
Industry payments (Open Payments)
- 2025$119.72 · 3 payments from 1 company
- 2024$152.84 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Acadia Pharmaceuticals Inc | $119.72 | 3 |
What the 2025 payments were for
- Food and Beverage$119.72 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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