Kong Chang, OD
Optometrist · Oklahoma City, OKNPI 1669429809
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 97.1% of the total across 112 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 18 manufacturers reported payments, led by Glaukos Corporation at 28.0% of the total. Among optometrist clinicians in OK with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 112 payments — averaging $64.57 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Glaukos Corporation$2K
- Bausch & Lomb Americas Inc.$1K
- Johnson & Johnson Vision Care, Inc.$1K
- Bausch & Lomb, A Division Of Bausch Health US, LLC$697
- Alcon$471
- Eyevance Pharmaceuticals LLC$434
- plus $1K from 12 others
What the payments were for
- Food & beverage$7,02297%
- Education$761%
- Entertainment$1342%
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 |
|---|---|---|
| Glaukos Corporation | 15 | $2,022 |
| Bausch & Lomb Americas Inc. | 14 | $1,109 |
| Johnson & Johnson Vision Care, Inc. | 21 | $1,092 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 11 | $697 |
| Alcon | 23 | $471 |
| Eyevance Pharmaceuticals LLC | 7 | $434 |
| Sun Pharmaceutical Industries Inc. | 3 | $320 |
| NEW World Medical,inc. | 1 | $178 |
| Optos, Inc. | 6 | $175 |
| Rxsight Inc | 1 | $146 |
| AbbVie(2 entities) | 2 | $128 |
| Kala Pharmaceuticals, Inc. | 1 | $120 |
| Shire North American Group Inc | 1 | $118 |
| The Cameron-ehlen Group, Inc. | 1 | $118 |
| ABB Con-cise Optical Group LLC | 1 | $33 |
| Coopervision Inc. | 2 | $26 |
| Dompe US, Inc. | 1 | $25 |
| Astellas Pharma US Inc | 1 | $18 |
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.
- INFUSE$561
- iDoseTR$500
- iStent Infinite$500
- Photrexa$483
- iStent inject W$388
- Acuvue$388
- KXL System$362
- ULTRA MULTIFOCAL TORIC$336
- CEQUA$221
- Photrexa Viscous and Photrexa$195
- Kahook Dual Blade$178
- Clearpath$178
- Ahmed Glaucoma Valve$178
- Streamline$178
- iStent Trabecular Micro-Bypass System Model iS3$153
- IACCESS$151
- iDose$150
- RXSIGHT CONTACT LENS$146
- RXSIGHT INJECTOR CARTRIDGE$146
- RXSIGHT INJECTOR HANDPIECE$146
How this compares
$7,232 in reported general payments places this provider in the 95th percentile of 714 optometrist providers in Oklahoma.
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 |
|---|---|---|
| Bepotastine Besilate | 91 | $18,410 |
| VyzultaLatanoprostene Bunod | 17 | $4,932 |
| Epinastine Hcl | 80 | $4,163 |
| Prednisolone Acetate | 137 | $4,056 |
| Alphagan PBrimonidine Tartrate | 13 | $2,520 |
| Azelastine Hcl | 22 | $1,124 |
| Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha | 78 | $927 |
| Brimonidine Tartrate | 30 | $547 |
| Latanoprost | 89 | $511 |
| Ofloxacin | 20 | $237 |
| Timolol Maleate | 21 | $105 |
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 |
|---|---|---|
| Bausch & Lomb Americas Inc.Vyzulta | $1,109 | $4,93217 claims |
| AbbVieAlphagan P | $128 | $2,52013 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 95th percentile of 714 optometrist providers in Oklahoma.
Other optometrist in Oklahoma City
- Joseph PhillipsOklahoma City$52K
- Scott ForesterOklahoma City$17K
- Trent PittOklahoma City$15K
- Bradley DanielOklahoma City$7K
- Kenneth GuthrieOklahoma City$7K
- Myranda PartinOklahoma City$7K
- Trevor ConklinOklahoma City$7K
- Carissa BeaudreauOklahoma City$6K
- Colby RicksOklahoma City$6K
- Rachel CaywoodOklahoma City$6K
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.