May-May Chan
Optometrist · Pittsburg, CANPI 1669515169
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (53.5%), travel and lodging and gifts — rather than concentrated in one kind of arrangement. Alcon accounts for 67.8% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2019 at $1,783 and has fallen 83.0% since, to $303 in 2025.
Across 40 payments — averaging $64.61 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Alcon$2K
- Coopervision Inc.$185
- Johnson & Johnson Vision Care, Inc.$183
- Bausch & Lomb Americas Inc.$161
- Sun Pharmaceutical Industries Inc.$70
- Glaukos Corporation$65
- plus $169 from 5 others
What the payments were for
- Travel & lodging$1,18246%
- Food & beverage$1,38354%
- Gifts$191%
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 |
|---|---|---|
| Alcon | 15 | $1,752 |
| Coopervision Inc. | 7 | $185 |
| Johnson & Johnson Vision Care, Inc. | 3 | $183 |
| Bausch & Lomb Americas Inc. | 3 | $161 |
| Sun Pharmaceutical Industries Inc. | 4 | $70 |
| Glaukos Corporation | 1 | $65 |
| Dompe US, Inc. | 2 | $59 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 2 | $41 |
| Mallinckrodt Hospital Products Inc. | 1 | $27 |
| AbbVie | 1 | $22 |
| Carl Zeiss Meditec AG | 1 | $19 |
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.
How this compares
$2,584 in reported general payments places this provider in the 80th percentile of 6,778 optometrist providers in California.
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 Pittsburg
- Steve YoelinNewport Beach$4.1M
- Matthew GellerSpring Valley$3.5M
- Melissa EricksonDavis$522K
- Omid KhodaiLake Forest$499K
- Jason TuSan Diego$351K
- Scott SchachterPismo Beach$312K
- Alicia LauSan Diego$300K
- Vin DangBakersfield$284K
- Steven FerrucciSepulveda$272K
- Katie ChuRosemead$271K
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.