Elizabeth V. Nguyen, D.O.
NPI 1689891640ActiveIndividual· Ophthalmology· Fountain Valley, CA
Ophthalmology (D.O.) with Orange County Ophthalmology Medical Group. and 1 other group, practicing in Fountain Valley, California. Their prescriptions cost Medicare Part D more than their services did: $845,379 for 2,547 claims, against $216,241 paid for services in 2024. Amgen Inc. was the largest of 10 companies reporting payments in 2025, $947.55 in all, mostly food and beverage. Lists Anaheim Community Hospital, LLC as a hospital affiliation.
Overview
| NPI | 1689891640 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Apr 19, 2007 |
| Last updated in NPPES | Jul 3, 2024 |
| Certified by provider | May 6, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 20A 10810 | CA |
| Ophthalmology | 207W00000X | 5101016090 | MI |
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 - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 839 |
|---|---|
| Services billed | 2,873 across 50 procedure codes |
| Paid by Medicare | $216,241 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,547 · 3,562 30-day fills |
|---|---|
| Patients | 551 |
| Total drug cost | $845,379 |
| Generic share | 43% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Ophthalmology |
Medical groups
- Orange County Ophthalmology Medical Group.Garden Grove, CA · 4 clinicians
- Michael K Tran M D IncWestminster, CA · 2 clinicians
Hospital affiliation
- Anaheim Community Hospital, LLCAnaheim, CA
Industry payments (Open Payments)
- 2025$947.55 · 38 payments from 10 companies
- 2024$1,146 · 38 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $184.12 | 9 |
| Tarsus Pharmaceuticals, Inc. | $157.24 | 5 |
| Alcon Vision LLC | $157.20 | 7 |
| Abbvie Inc. | $129.89 | 4 |
| Mallinckrodt Hospital Products Inc. | $80.53 | 3 |
What the 2025 payments were for
- Food and Beverage$947.55 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other ophthalmologists in Fountain Valley
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All 21 ophthalmologists in Fountain Valley · All ophthalmologists in California