Thanh Loan Dorsam, OD
Optometrist · Washington, DCNPI 1447319629
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 95.8% of the total across 78 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 17 manufacturers reported payments, led by Johnson & Johnson Vision Care, Inc. at 24.8% of the total. Reporting peaked in 2023 at $1,263 and has fallen 54.5% since, to $575 in 2025. Among optometrist clinicians in DC with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 78 payments — averaging $38.55 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson Vision Care, Inc.$746
- Alcon$565
- Glaukos Corporation$381
- Sun Pharmaceutical Industries Inc.$264
- Coopervision Inc.$254
- Oyster Point Pharma, Inc.$158
- plus $640 from 11 others
What the payments were for
- Food & beverage$2,88096%
- Entertainment$1274%
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 |
|---|---|---|
| Johnson & Johnson Vision Care, Inc. | 28 | $746 |
| Alcon | 7 | $565 |
| Glaukos Corporation | 4 | $381 |
| Sun Pharmaceutical Industries Inc. | 5 | $264 |
| Coopervision Inc. | 12 | $254 |
| Oyster Point Pharma, Inc. | 4 | $158 |
| LKC Technologies, Inc. | 2 | $144 |
| Optos, Inc. | 1 | $127 |
| Bausch & Lomb Americas Inc. | 5 | $101 |
| Rxsight Inc | 1 | $75 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 3 | $59 |
| Tarsus Pharmaceuticals, Inc. | 1 | $31 |
| Lombart Brothers, Inc. | 1 | $28 |
| ABB Con-cise Optical Group LLC | 1 | $25 |
| Topcon Healthcare, Inc. | 1 | $20 |
| Oasis Medical, Inc. | 1 | $17 |
| Novartis | 1 | $15 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- TOTAL30$430
- OCT OPHTHALMOSCOPE$255
- PANORAMIC OPHTHALMOSCOPE$255
- KXL1B-CE-marked KXLsystem$135
- KXL System$135
- NFC-700$127
- TYRVAYA$107
- CEQUA$106
How this compares
$3,007 in reported general payments places this provider in the 90th percentile of 71 optometrist providers in District of Columbia.
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.
Other optometrist in Washington
- Saba MatternWashington$11K
- Evelyn DearingWashington$5K
- Gregory FoleyWashington$4K
- Nastaran GolrizWashington$4K
- Nguyen WatermanWashington$4K
- Arnold MillerWashington$3K
- Cheryl TranWashington$3K
- Dalia ElkassabanyWashington$3K
- Nickey NeagleWashington$3K
- Maureen KimmethWashington$3K
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.