Diem T. Nguyen, O.D.
NPI 1669554812ActiveIndividual· Optometrist· Easley, SC
Optometrist (O.D.) in Easley, South Carolina, trained at New England College of Optometry (class of 2002). In 2024 Medicare paid $58,183 for 554 patients, and Part D covered 356 of their prescriptions, 58% of them generic. Oyster Point Pharma, Inc. was the largest of 6 companies reporting payments in 2025, $236.65 in all, mostly food and beverage.
Overview
| NPI | 1669554812 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Oct 19, 2006 |
| Last updated in NPPES | Sep 22, 2026 |
| Certified by provider | Sep 22, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 2301 | SC |
| Optometrist | 152W00000X | 0618-001238 | VA |
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 (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 554 |
|---|---|
| Services billed | 954 across 20 procedure codes |
| Paid by Medicare | $58,183 |
Part D prescriptions in 2024
| Prescriptions (claims) | 356 · 592 30-day fills |
|---|---|
| Patients | 189 |
| Total drug cost | $82,783 |
| Generic share | 58% of claims |
Education and affiliations
| Medical school | New England College of Optometry |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Optometry |
Medical group
- Jervey Eye Group PAGreenville, SC · 21 clinicians
Industry payments (Open Payments)
- 2025$236.65 · 10 payments from 6 companies
- 2024$108.25 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Oyster Point Pharma, Inc. | $110.05 | 4 |
| Tarsus Pharmaceuticals, Inc. | $44.50 | 2 |
| Alcon Vision LLC | $26.24 | 1 |
| Bausch & Lomb Americas Inc. | $19.98 | 1 |
| Harrow Eye, LLC | $19.59 | 1 |
What the 2025 payments were for
- Food and Beverage$236.65 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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