William Tsiaras, MD
Ophthalmology · Providence, RINPI 1376609180
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 37 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 9 manufacturers reported payments, led by AbbVie at 38.9% of the total. Reporting peaked in 2019 at $164 and has fallen 50.4% since, to $82 in 2025. That places this record below the midpoint for ophthalmology clinicians in RI, where the typical reported total is $781.
Across 37 payments — averaging $20.12 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$289
- Alcon$175
- Aerie Pharmaceuticals, Inc.$89
- Johnson & Johnson$51
- Bausch & Lomb, A Division Of Bausch Health US, LLC$43
- Oyster Point Pharma, Inc.$34
- plus $63 from 3 others
What the payments were for
- Food & beverage$744100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| AbbVie(2 entities) | 16 | $289 |
| Alcon | 8 | $175 |
| Aerie Pharmaceuticals, Inc. | 5 | $89 |
| Johnson & Johnson | 2 | $51 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 2 | $43 |
| Oyster Point Pharma, Inc. | 1 | $34 |
| Novartis | 1 | $23 |
| Mallinckrodt Enterprises LLC | 1 | $21 |
| Bausch & Lomb Americas Inc. | 1 | $19 |
How this compares
$744 in reported general payments places this provider in the 45th percentile of 69 ophthalmology providers in Rhode Island.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| LumiganBimatoprost | 99 | $37,129 |
| RestasisCyclosporine | 15 | $9,061 |
| RhopressaNetarsudil Mesylate | 11 | $5,640 |
| Latanoprost | 287 | $5,092 |
| RocklatanNetarsudil Mesylat/Latanoprost | 14 | $4,804 |
| Timolol Maleate | 184 | $4,245 |
| CombiganBrimonidine Tartrate/Timolol | 12 | $3,077 |
| SimbrinzaBrinzolamide/Brimonidine Tart | 13 | $2,809 |
| Prednisolone Acetate | 34 | $1,365 |
| Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol | 12 | $1,339 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 48 | $1,035 |
| Brimonidine Tartrate | 68 | $886 |
| Dorzolamide Hcl | 23 | $617 |
| Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha | 20 | $264 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieLumigan, Restasis, Combigan | $289 | $49,267126 claims |
| Aerie Pharmaceuticals, Inc.Rhopressa, Rocklatan | $89 | $10,44425 claims |
| AlconSimbrinza | $175 | $2,80913 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 45th percentile of 69 ophthalmology providers in Rhode Island.
Other ophthalmology in Providence
- Sarah AnisProvidence$163K
- Jesse RichmanProvidence$30K
- Yoash EnzerProvidence$11K
- David TienProvidence$6K
- Jane CookProvidence$4K
- Christopher NewtonProvidence$3K
- Joseph DucharmeProvidence$3K
- King ToProvidence$2K
- Gaurav GuptaProvidence$2K
- Carolina ChiouProvidence$2K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.