Phu Thien Nguyen, D.O.
General Practice (D.O.) in Garden Grove, California, trained at College of Osteo Med of the Pacific at Pomona (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $38,517 for 340 claims, against $22,498 paid for services in 2024. Boston Scientific Corporation was the largest of 5 companies reporting payments in 2025, $144.25 in all, mostly food and beverage. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1386642866 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jul 8, 2005 |
| Last updated in NPPES | Jun 18, 2026 |
| Certified by provider | Jun 18, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| General Practice Primary | 208D00000X | 20A7161 | CA |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Phu Ba Nguyen · Chiropractic | 1128a3 | Jun 20, 2005 | San Jose, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 220 across 7 procedure codes |
| Paid by Medicare | $22,498 |
Part D prescriptions in 2024
| Prescriptions (claims) | 340 · 808 30-day fills |
|---|---|
| Patients | 131 |
| Total drug cost | $38,517 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | College of Osteo Med of the Pacific at Pomona |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Obstetrics/Gynecology |
| Telehealth | Offers telehealth |
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$144.25 · 6 payments from 5 companies
- 2024$402.81 · 16 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $54.32 | 1 |
| Exeltis, USA Inc. | $38.91 | 2 |
| Novo Nordisk Inc | $20.02 | 1 |
| Lilly USA, LLC | $16.91 | 1 |
| Exact Sciences Corporation | $14.09 | 1 |
What the 2025 payments were for
- Food and Beverage$144.25 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 general practitioners in Garden Grove · All general practitioners in California