William Hemsley Merwin III, M.D.
NPI 1043697600ActiveIndividual· Student in an Organized Health Care Education/Training Program· Baltimore, MD
Student in an Organized Health Care Education/Training Program (M.D.) in Baltimore, Maryland, trained at Georgetown University School of Medicine (class of 2015). Part D covered 332 prescriptions written in 2024, 38% of them generic. Inspire Medical Systems, Inc. reported $137.67 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1043697600 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 4, 2015 |
| Last updated in NPPES | Jun 11, 2025 |
| Certified by provider | Jun 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Student in an Organized Health Care Education/Training Program Primary | 390200000X | — | MD |
| Internal Medicine | 207R00000X | D0091613 | 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 - Critical Care (Intensivists) (DC); Practitioner - Hospitalist (MD) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 332 · 480 30-day fills |
|---|---|
| Patients | 55 |
| Total drug cost | $235,336 |
| Generic share | 38% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Hospitalist |
Medical group
- Medstar Medical Group II LLCWashington, DC · 3,767 clinicians
Hospital affiliations
- Johns Hopkins Hospital, theBaltimore, MD
- Medstar Franklin Square Medical CenterRosedale, MD
Industry payments (Open Payments)
- 2025$137.67 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Inspire Medical Systems, Inc. | $137.67 | 1 |
What the 2025 payments were for
- Food and Beverage$137.67 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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