Hoa Nguyen, M.D
NPI 1619931763ActiveIndividual· Internal Medicine· Westminster, CA
Internal Medicine (M.D) in Westminster, California, trained at University of Tennessee, Hsc, College of Medicine (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $247,084 for 2,936 claims, against $36,721 paid for services in 2024. Vivus LLC was the largest of 3 companies reporting payments in 2025, $64.89 in all, mostly food and beverage.
Overview
| NPI | 1619931763 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | Yes |
| NPI issued | Apr 14, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G58722 | CA |
| Internal Medicine, Gastroenterology | 207RG0100X | G58722 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 134 |
|---|---|
| Services billed | 400 across 12 procedure codes |
| Paid by Medicare | $36,721 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,936 · 6,526 30-day fills |
|---|---|
| Patients | 333 |
| Total drug cost | $247,084 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Gastroenterology |
Industry payments (Open Payments)
- 2025$64.89 · 3 payments from 3 companies
- 2024$594.54 · 9 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vivus LLC | $24.85 | 1 |
| Exact Sciences Corporation | $22.54 | 1 |
| Braintree Laboratories, Inc. | $17.50 | 1 |
What the 2025 payments were for
- Food and Beverage$64.89 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 74 internal medicine physicians in Westminster · All internal medicine physicians in California