William G. Tsiaras, M.D.
NPI 1376609180ActiveIndividual· Ophthalmology· Providence, RI
Ophthalmology (M.D.) in Providence, Rhode Island, trained at Warren Alpert Medical School of Brown University (class of 1975). In 2024 Medicare paid $82,394 for 546 patients, and Part D covered 916 of their prescriptions, 72% of them generic. Abbvie Inc. was the largest of 3 companies reporting payments in 2025, $81.54 in all, mostly food and beverage.
Overview
| NPI | 1376609180 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Dec 28, 2006 |
| Last updated in NPPES | Jul 18, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 4952 | RI |
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 (RI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 546 |
|---|---|
| Services billed | 1,203 across 12 procedure codes |
| Paid by Medicare | $82,394 |
Part D prescriptions in 2024
| Prescriptions (claims) | 916 · 1,770 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $96,274 |
| Generic share | 72% of claims |
Education and affiliations
| Medical school | Warren Alpert Medical School of Brown University |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Ophthalmology |
Industry payments (Open Payments)
- 2025$81.54 · 4 payments from 3 companies
- 2024$139.05 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $38.67 | 2 |
| Alcon Vision LLC | $24.06 | 1 |
| Bausch & Lomb Americas Inc. | $18.81 | 1 |
What the 2025 payments were for
- Food and Beverage$81.54 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 45 ophthalmologists in Providence · All ophthalmologists in Rhode Island