Andrew Hung Nguyen Nguyen, MD
NPI 1366590291ActiveIndividual· Internal Medicine, Rheumatology· Riverside, CA
Internal Medicine, Rheumatology (MD) in Riverside, California, trained at Western University of Health Sciences College of Dental Med (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $1,639,685 for 2,237 claims, against $674.80 paid for services in 2024. Abiomed was the largest of 2 companies reporting payments in 2025, $275.32 in all, mostly food and beverage.
Overview
| NPI | 1366590291 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 8, 2007 |
| Last updated in NPPES | Dec 3, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 20A8400 | 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 | 11 |
|---|---|
| Services billed | 13 across 4 procedure codes |
| Paid by Medicare | $674.80 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,237 · 4,916 30-day fills |
|---|---|
| Patients | 516 |
| Total drug cost | $1,639,685 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Western University of Health Sciences College of Dental Med |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Rheumatology |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Industry payments (Open Payments)
- 2025$275.32 · 2 payments from 2 companies
- 2024$266.74 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $146.15 | 1 |
| Actelion Pharmaceuticals US, Inc. | $129.17 | 1 |
What the 2025 payments were for
- Food and Beverage$275.32 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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