Richard L. Nguyen, M.D.
NPI 1134178486ActiveIndividual· Ophthalmology· Garden Grove, CA
Ophthalmology (M.D.) in Garden Grove, California, trained at Loma Linda University School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $1,099,489 for 10,128 claims, against $87,742 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $240.79 in all, mostly food and beverage.
Overview
| NPI | 1134178486 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 6, 2006 |
| Last updated in NPPES | Feb 13, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G77473 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 627 |
|---|---|
| Services billed | 1,004 across 10 procedure codes |
| Paid by Medicare | $87,742 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,128 · 11,802 30-day fills |
|---|---|
| Patients | 1,073 |
| Total drug cost | $1,099,489 |
| Generic share | 72% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Ophthalmology |
Industry payments (Open Payments)
- 2025$240.79 · 10 payments from 2 companies
- 2024$26.29 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $215.24 | 9 |
| Alcon Vision LLC | $25.55 | 1 |
What the 2025 payments were for
- Food and Beverage$240.79 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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