Thanh-Lan Trong Quan, MD
NPI 1831133511ActiveIndividual· Ophthalmology· Westminster, CA
Ophthalmology (MD) in Westminster, California, trained at University of California, Geffen School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $3,634,510 for 9,947 claims, against $374,987 paid for services in 2024. Alcon Vision LLC was the largest of 11 companies reporting payments in 2025, $2,674 in all, mostly food and beverage.
Overview
| NPI | 1831133511 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 15, 2006 |
| Last updated in NPPES | Apr 8, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G69821 | 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 DME Supplier - Physician - Ophthalmology (CA); Practitioner - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,342 |
|---|---|
| Services billed | 4,156 across 36 procedure codes |
| Paid by Medicare | $374,987 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,947 · 15,235 30-day fills |
|---|---|
| Patients | 1,335 |
| Total drug cost | $3,634,510 |
| Generic share | 36% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Ophthalmology |
Industry payments (Open Payments)
- 2025$2,674 · 77 payments from 11 companies
- 2024$1,869 · 69 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $727.93 | 12 |
| Amgen Inc. | $591.04 | 27 |
| Bausch & Lomb Americas Inc. | $375.81 | 10 |
| Sun Pharmaceutical Industries Inc. | $273.59 | 7 |
| Abbvie Inc. | $138.00 | 7 |
What the 2025 payments were for
- Food and Beverage$2,674 · 77 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other ophthalmologists in Westminster
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- 1659434546
- 1710900477
- 1972879427
- 1104003185
- 1144953738
- 1174972145
- 1245606698
All 18 ophthalmologists in Westminster · All ophthalmologists in California