Thomas McNamara, MD
NPI 1427047877ActiveIndividual· Internal Medicine· Bethesda, MD
Internal Medicine (MD) in Bethesda, Maryland, trained at Georgetown University School of Medicine (class of 1975). Their prescriptions cost Medicare Part D more than their services did: $356,439 for 3,393 claims, against $115,259 paid for services in 2024. Lilly USA, LLC was the largest of 8 companies reporting payments in 2025, $284.47 in all, mostly food and beverage.
Overview
| NPI | 1427047877 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 18, 2005 |
| Last updated in NPPES | Jan 16, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D0032610 | MD |
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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 311 |
|---|---|
| Services billed | 1,409 across 33 procedure codes |
| Paid by Medicare | $115,259 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,393 · 7,804 30-day fills |
|---|---|
| Patients | 336 |
| Total drug cost | $356,439 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Suburban/Nrh Medical Rehabilitation IncBethesda, MD · 941 clinicians
- Bethesda Medical AssociatesBethesda, MD · 7 clinicians
Hospital affiliation
- Sibley Memorial HospitalWashington, DC
Other facilities
- Adventist Home Health Services, Inc.Home health agency · Silver Spring, MD
- Bayada Home Health Care, IncHome health agency · Gaithersburg, MD
Industry payments (Open Payments)
- 2025$284.47 · 13 payments from 8 companies
- 2024$131.68 · 6 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $68.31 | 3 |
| Pfizer Inc. | $48.08 | 2 |
| Sumitomo Pharma America, Inc. | $47.48 | 2 |
| Abbvie Inc. | $41.24 | 2 |
| Amgen Inc. | $21.73 | 1 |
What the 2025 payments were for
- Food and Beverage$284.47 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 364 internal medicine physicians in Bethesda · All internal medicine physicians in Maryland