Tammy T. Nguyen
NPI 1457973992ActiveIndividual· Optometrist· Tigard, OR
Optometrist in Tigard, Oregon, trained at Pacific University - College of Optometry (class of 2020). Their prescriptions cost Medicare Part D more than their services did: $17,849 for 83 claims, against $5,719 paid for services in 2024. Glaukos Corporation was the largest of 2 companies reporting payments in 2025, $68.55 in all, mostly food and beverage.
Overview
| NPI | 1457973992 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | May 7, 2020 |
| Last updated in NPPES | Jul 9, 2021 |
| Certified by provider | Jun 16, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | ATI4550 | OR |
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 (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 43 |
|---|---|
| Services billed | 93 across 10 procedure codes |
| Paid by Medicare | $5,719 |
Part D prescriptions in 2024
| Prescriptions (claims) | 83 · 118 30-day fills |
|---|---|
| Patients | 24 |
| Total drug cost | $17,849 |
| Generic share | 58% of claims |
Education and affiliations
| Medical school | Pacific University - College of Optometry |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Optometry |
Medical groups
- Tigard Vision Center, Inc.Tigard, OR · 4 clinicians
- Murray Scholls Optique IncBeaverton, OR · 3 clinicians
- West Linn Vision Center IncWest Linn, OR · 3 clinicians
Industry payments (Open Payments)
- 2025$68.55 · 2 payments from 2 companies
- 2024$351.11 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaukos Corporation | $50.07 | 1 |
| Johnson & Johnson Vision Care, Inc. | $18.48 | 1 |
What the 2025 payments were for
- Food and Beverage$68.55 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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