Loh-Shan Bryan Leung, MD
NPI 1639330772ActiveIndividual· Ophthalmology, Retina Specialist· Stanford, CA
Ophthalmology, Retina Specialist (MD) in Stanford, California, trained at Johns Hopkins University School of Medicine (class of 2005). In 2024 Medicare paid $65,151 for 348 patients, and Part D covered 63 of their prescriptions, 83% of them generic. Regeneron Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $121.99 in all, mostly food and beverage.
Overview
| NPI | 1639330772 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 20, 2008 |
| Last updated in NPPES | Apr 4, 2024 |
| Certified by provider | Apr 4, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology, Retina Specialist Primary | 207WX0107X | A109299 | CA |
| Ophthalmology | 207W00000X | 241716 | NY |
| Ophthalmology | 207W00000X | A109299 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 348 |
|---|---|
| Services billed | 1,220 across 22 procedure codes |
| Paid by Medicare | $65,151 |
Part D prescriptions in 2024
| Prescriptions (claims) | 63 · 104 30-day fills |
|---|---|
| Patients | 22 |
| Total drug cost | $3,798 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Johns Hopkins University School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Ophthalmology |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$121.99 · 2 payments from 2 companies
- 2024$23.90 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Pharmaceuticals, Inc. | $90.39 | 1 |
| Genentech USA, Inc. | $31.60 | 1 |
What the 2025 payments were for
- Food and Beverage$121.99 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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