Sam S. Yang, MD
NPI 1811049034ActiveIndividual· Ophthalmology· Walnut Creek, CA
Ophthalmology (MD) with Permanente Medical Group Inc, practicing in Walnut Creek, California. Their prescriptions cost Medicare Part D more than their services did: $22,745 for 553 claims, against $3,325 paid for services in 2024. Astellas Pharma Global Development reported $32.82 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1811049034 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 17, 2007 |
| Last updated in NPPES | Dec 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A75699 | 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 Practitioner - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 11 |
|---|---|
| Services billed | 42 across 10 procedure codes |
| Paid by Medicare | $3,325 |
Part D prescriptions in 2024
| Prescriptions (claims) | 553 · 1,104 30-day fills |
|---|---|
| Patients | 122 |
| Total drug cost | $22,745 |
| Generic share | 66% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Ophthalmology |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
- 2025$32.82 · 1 payment from 1 company
- 2024$167.47 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma Global Development | $32.82 | 1 |
What the 2025 payments were for
- Food and Beverage$32.82 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 ophthalmologists in Walnut Creek · All ophthalmologists in California