Stephen T. Nguyen, M.D.
NPI 1265596050ActiveIndividual· Internal Medicine· Gaithersburg, MD
Internal Medicine (M.D.) in Gaithersburg, Maryland, licensed in MD, with an NPI issued in December 2006. Their prescriptions cost Medicare Part D more than their services did: $1,396,151 for 10,056 claims, against $176,092 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 14 companies reporting payments in 2025, $1,825 in all, mostly food and beverage. Lists Adventist Healthcare Shady Grove Medical Center as a hospital affiliation.
Overview
| NPI | 1265596050 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Dec 19, 2006 |
| Last updated in NPPES | Aug 14, 2025 |
| Certified by provider | Aug 14, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D0063163 | 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 | 390 |
|---|---|
| Services billed | 5,784 across 21 procedure codes |
| Paid by Medicare | $176,092 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,056 · 21,699 30-day fills |
|---|---|
| Patients | 462 |
| Total drug cost | $1,396,151 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliation
- Adventist Healthcare Shady Grove Medical CenterRockville, MD
Other facilities
- Adventist Home Health Services, Inc.Home health agency · Silver Spring, MD
- Amedisys Home Health CareHome health agency · Largo, MD
Industry payments (Open Payments)
- 2025$1,825 · 64 payments from 14 companies
- 2024$1,904 · 82 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $432.89 | 10 |
| Bayer Healthcare Pharmaceuticals Inc. | $349.38 | 11 |
| Gilead Sciences, Inc. | $305.84 | 13 |
| Exact Sciences Corporation | $228.24 | 6 |
| Glaxosmithkline, LLC. | $103.36 | 5 |
What the 2025 payments were for
- Food and Beverage$1,825 · 64 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 81 internal medicine physicians in Gaithersburg · All internal medicine physicians in Maryland