Dien Nguyen, O.D.
NPI 1770636557ActiveIndividual· Optometrist· Fremont, CA
Optometrist (O.D.) with Permanente Medical Group Inc, practicing in Fremont, California. Their prescriptions cost Medicare Part D more than their services did: $2,723 for 96 claims, against $373.50 paid for services in 2024. Coopervision Inc. was the largest of 2 companies reporting payments in 2025, $223.60 in all, mostly food and beverage.
Overview
| NPI | 1770636557 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Jan 18, 2007 |
| Last updated in NPPES | Dec 30, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 11458T | 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 - Optometry (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 15 across 1 procedure code |
| Paid by Medicare | $373.50 |
Part D prescriptions in 2024
| Prescriptions (claims) | 96 · 219 30-day fills |
|---|---|
| Patients | 38 |
| Total drug cost | $2,723 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Optometry |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
- 2025$223.60 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Coopervision Inc. | $124.18 | 1 |
| Johnson & Johnson Vision Care, Inc. | $99.42 | 1 |
What the 2025 payments were for
- Food and Beverage$223.60 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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