Charles L. Nguyen, D.O.
NPI 1679704084ActiveIndividual· Internal Medicine· Houston, TX
Internal Medicine (D.O.) in Houston, Texas, trained at Philadelphia College of Osteopathic Medicine (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $578,198 for 10,477 claims, against $170,183 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 6 companies reporting payments in 2025, $438.15 in all, mostly food and beverage.
Overview
| NPI | 1679704084 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | Aug 3, 2009 |
| Last updated in NPPES | May 5, 2022 |
| Certified by provider | May 5, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | Q3746 | TX |
| Internal Medicine | 207R00000X | OS016027 | PA |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 384 |
|---|---|
| Services billed | 2,011 across 23 procedure codes |
| Paid by Medicare | $170,183 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,477 · 10,666 30-day fills |
|---|---|
| Patients | 368 |
| Total drug cost | $578,198 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Philadelphia College of Osteopathic Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Internal Medicine |
Medical groups
- Trumen Physician and Associates Post Acute PLLCHouston, TX · 133 clinicians
- Trumen Physicians and Associates PLLCHouston, TX · 131 clinicians
Hospital affiliations
- Chi St Joseph Health Regional HospitalBryan, TX
- Madison St Joseph Health CenterMadisonville, TX
Other facilities
- Caring Professional Health Services IncHome health agency · Houston, TX
- Altus HospiceHospice · Kingwood, TX
- Olive Branch HospiceHospice · Jasper, TX
- Vantage HospiceHospice · Houston, TX
- Eagle Crest Rapid RecoveryNursing home · Houston, TX
- Madisonville Care CenterNursing home · Madisonville, TX
- Park Manor of Cypress StationNursing home · Houston, TX
- The Village at Gleannloch FarmsNursing home · Spring, TX
- Treemont Health Care CenterNursing home · Houston, TX
Industry payments (Open Payments)
- 2025$438.15 · 19 payments from 6 companies
- 2024$184.78 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $160.80 | 7 |
| Neurocrine Biosciences, Inc. | $139.73 | 6 |
| Acadia Pharmaceuticals Inc | $57.04 | 3 |
| Alpha Cognition USA, Inc. | $31.83 | 1 |
| Heron Therapeutics, Inc. | $25.10 | 1 |
What the 2025 payments were for
- Food and Beverage$438.15 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Houston
- 1104090984
- 1841368131
- 1548971146
- 1104197193
- 1821963208
- 1912211376
- 1922760388
- 1285176263
- 1467059857
- 1780234997
- 1134719990
- 1316218530