Myhanh J. Nguyen, MD
Opted out of Medicare from January 2025 to January 2027. Internal Medicine (MD) in Portsmouth, New Hampshire, licensed in NH and ME, with an NPI issued in November 2006. Mostly services rather than prescriptions: Medicare paid $3,519 for 28 patients in 2024, with only 15 Part D claims. Bayer Healthcare Pharmaceuticals Inc. reported $84.44 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1518034826 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 29, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
| Certified by provider | Dec 3, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 13553 | NH |
| Hospitalist | 208M00000X | 13553 | NH |
| Hospitalist | 208M00000X | MD23141 | ME |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 1, 2025 – Jan 1, 2027 |
| Can order and refer | Yes |
| Accepts assignment | Yes (participating) |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Medicare services in 2024
| Medicare patients | 28 |
|---|---|
| Services billed | 52 across 5 procedure codes |
| Paid by Medicare | $3,519 |
Part D prescriptions in 2024
| Prescriptions (claims) | 15 · 19 30-day fills |
|---|---|
| Patients | 11 |
| Total drug cost | $286.53 |
| Generic share | 87% of claims |
Industry payments (Open Payments)
- 2025$84.44 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $84.44 | 1 |
What the 2025 payments were for
- Food and Beverage$84.44 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Portsmouth
- 1083683833
- 1174297980
- 1235767476
- 1336769389
- 1407435944
- 1427171545
- 1538259502
- 1598149510
- 1972722015
- 1053415794
- 1386083962
- 1922687599
All 46 internal medicine physicians in Portsmouth · All internal medicine physicians in New Hampshire