William Weng Ping Ko, M.D.
NPI 1548268873ActiveIndividual· Ophthalmology· San Gabriel, CA
Ophthalmology (M.D.) in San Gabriel, California, trained at Boston University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $966,513 for 5,863 claims, against $301,401 paid for services in 2024. Alcon Vision LLC was the largest of 2 companies reporting payments in 2025, $154.01 in all, mostly food and beverage.
Overview
| NPI | 1548268873 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 11, 2005 |
| Last updated in NPPES | Feb 22, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G73648 | 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 | 902 |
|---|---|
| Services billed | 4,664 across 20 procedure codes |
| Paid by Medicare | $301,401 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,863 · 10,155 30-day fills |
|---|---|
| Patients | 1,032 |
| Total drug cost | $966,513 |
| Generic share | 61% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Ophthalmology |
Industry payments (Open Payments)
- 2025$154.01 · 3 payments from 2 companies
- 2024$16.60 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $124.94 | 1 |
| Sun Pharmaceutical Industries Inc. | $29.07 | 2 |
What the 2025 payments were for
- Food and Beverage$154.01 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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