Theodore Thien Nguyen, MD
NPI 1104484781ActiveIndividual· Internal Medicine· Loma Linda, CA
Internal Medicine (MD) in Loma Linda, California, trained at Loma Linda University School of Medicine (class of 2019). 173 Medicare patients in 2024, $34,429 paid; nearly all of their 310 Part D prescriptions were generic (94%). Atos Medical Inc reported $30.05 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1104484781 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 30, 2019 |
| Last updated in NPPES | Aug 3, 2022 |
| Certified by provider | Aug 3, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A178744 | CA |
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 - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 173 |
|---|---|
| Services billed | 464 across 8 procedure codes |
| Paid by Medicare | $34,429 |
Part D prescriptions in 2024
| Prescriptions (claims) | 310 · 325 30-day fills |
|---|---|
| Patients | 100 |
| Total drug cost | $17,662 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Hospitalist |
Medical group
- Faculty Physicians and Surgeons of LlusmLoma Linda, CA · 1,315 clinicians
Hospital affiliation
- Loma Linda University Medical CenterLoma Linda, CA
Industry payments (Open Payments)
- 2025$30.05 · 1 payment from 1 company
- 2024$33.11 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Atos Medical Inc | $30.05 | 1 |
What the 2025 payments were for
- Food and Beverage$30.05 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 220 internal medicine physicians in Loma Linda · All internal medicine physicians in California