Phuong T. Nguyen, M.D.
Internal Medicine, Gastroenterology (M.D.) in Newport Beach, California, trained at University of California, Geffen School of Medicine (class of 1990). Medicare paid $48,356 for services to 234 patients in 2024. Amgen Inc. was the largest of 13 companies reporting payments in 2025, $2,234 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 | 1801838750 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 12, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G76446 | 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 | Phuong Thi Nguyen · Owner/Operator | 1128a1 | Oct 19, 2000 | Lake Forest, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 234 |
|---|---|
| Services billed | 394 across 28 procedure codes |
| Paid by Medicare | $48,356 |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Gastroenterology |
Medical group
- Hoag ClinicNewport Beach, CA · 460 clinicians
Hospital affiliation
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
Industry payments (Open Payments)
- 2025$2,234 · 33 payments from 13 companies
- 2024$3,195 · 27 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $481.93 | 7 |
| Cook Medical LLC | $477.43 | 6 |
| Merit Medical Systems Inc | $225.24 | 2 |
| Boston Scientific Corporation | $202.99 | 5 |
| Medtronic, Inc. | $147.66 | 2 |
What the 2025 payments were for
- Food and Beverage$2,045 · 32 payments
- Travel and Lodging$189.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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