Payment overview · 2025
General Payments
$20,483.20
49 reported records · 7 companies
Healthcare provider profile · identity verified
Robert T Chang, MD
Allopathic & Osteopathic Physicians|Ophthalmology · STANFORD, CA · NPI 1417044280
Verified facts
What the public records show
CMS Open Payments records show Robert T Chang, MD received $20,483.20 in general payments during 2025 across 49 reported records.
Alcon Vision LLC accounted for 63.7% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 14 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Rocklatan.
ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LUMIGAN as an associated drug or biological on 25016 records involving 7645 distinct recipient NPIs. Public Medicare Part D data also shows 39 claims for Lumigan by this doctor in 2024.
Alcon Research LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Rhopressa as an associated drug or biological on 32 records involving 8 distinct recipient NPIs. Public Medicare Part D data also shows 40 claims for Rhopressa by this doctor in 2024.
Alcon Research LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Rocklatan as an associated drug or biological on 36 records involving 12 distinct recipient NPIs. Public Medicare Part D data also shows 76 claims for Rocklatan by this doctor in 2024.
Alcon Vision LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Rhopressa as an associated drug or biological on 1524 records involving 961 distinct recipient NPIs. Public Medicare Part D data also shows 40 claims for Rhopressa by this doctor in 2024.
Alcon Vision LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Rocklatan as an associated drug or biological on 12237 records involving 5351 distinct recipient NPIs. Public Medicare Part D data also shows 76 claims for Rocklatan by this doctor in 2024.
Alcon Vision LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Simbrinza as an associated drug or biological on 1563 records involving 637 distinct recipient NPIs. Public Medicare Part D data also shows 43 claims for Simbrinza by this doctor in 2024.
Bausch & Lomb Americas Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported XIIDRA as an associated drug or biological on 28163 records involving 11019 distinct recipient NPIs. Public Medicare Part D data also shows 43 claims for Xiidra by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Separate record types
Research & Ownership
Research Payments (direct recipient): not present in the loaded data
Associated Research Funding (for example, named PI): not present in the loaded data
Ownership / Investment: not present in the loaded data
These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.
Who paid this doctor?
Companies in 2025 General Payments
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| Alcon Vision LLC | Unresolved — no canonical attribution shown | $13,045.65 | 63.7% | 28 | 2025 |
| Alcon Research LLC | Unresolved — no canonical attribution shown | $4,000.00 | 19.5% | 4 | 2025 |
| Sight Sciences, Inc. | Unresolved — no canonical attribution shown | $1,468.96 | 7.2% | 6 | 2025 |
| Glaukos Corporation | Unresolved — no canonical attribution shown | $1,091.03 | 5.3% | 5 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $788.44 | 3.9% | 3 | 2025 |
| Bausch & Lomb Americas Inc. | Unresolved — no canonical attribution shown | $65.22 | 0.3% | 2 | 2025 |
| Beaver-Visitec International, Inc. | Unresolved — no canonical attribution shown | $23.90 | 0.1% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Consulting Fee | $17,025.00 | 10 |
| Food and Beverage | $2,333.20 | 38 |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $1,125.00 | 1 |
A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.
Analysis 1 · Payment-linked products
Products named in Open Payments records
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| Voyager DSLT Normalized: voyager dslt |
Device | Alcon Vision LLC | $10,500.00 | 3 | 2025 |
Source payment records
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| HYDRUS Microstent Normalized: hydrus microstent |
Device | Alcon Vision LLC | $4,964.46 | 16 | 2025 |
Source payment records
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| NGENUITY Normalized: ngenuity |
Device | Alcon Research LLC | $4,000.00 | 4 | 2025 |
Source payment records
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| OMNI SURGICAL SYSTEM Normalized: omni surgical system |
Device | Sight Sciences, Inc. | $1,468.96 | 6 | 2025 |
Source payment records
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| SION SURGICAL INSTRUMENT Normalized: sion surgical instrument |
Device | Sight Sciences, Inc. | $1,237.07 | 3 | 2025 |
Source payment records
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| DURYSTA Normalized: durysta |
Drug | ABBVIE INC. | $732.24 | 2 | 2025 |
Source payment records
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| iDoseTR Normalized: idosetr |
Drug | Glaukos Corporation | $291.03 | 4 | 2025 |
Source payment records
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| Rocklatan Normalized: rocklatan |
Drug | Alcon Vision LLC | $205.09 | 3 | 2025 |
Source payment records
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| Clareon Normalized: clareon |
Device | Alcon Vision LLC | $139.67 | 4 | 2025 |
Source payment records
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| VYZULTA Normalized: vyzulta |
Drug | Bausch & Lomb Americas Inc. | $65.22 | 2 | 2025 |
Source payment records
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| XEN GLAUCOMA TREATMENT SYSTEM Normalized: xen glaucoma treatment system |
Device | ABBVIE INC. | $63.44 | 2 | 2025 |
Source payment records
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| MIEBO Normalized: miebo |
Drug | Bausch & Lomb Americas Inc. | $40.43 | 1 | 2025 |
Source payment records
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| ARGOS Normalized: argos |
Device | Alcon Vision LLC | $32.78 | 1 | 2025 |
Source payment records
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| iStent infinite Normalized: istent infinite |
Device | Glaukos Corporation | $23.08 | 1 | 2025 |
Source payment records
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* Product-associated amounts are non-additive because one payment record may name more than one product.
These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.
Public prescribing for products named in payments
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| Rocklatan rocklatan |
2025 | Rocklatan | 2024 | 76 | exact normalized | Medicare Part D |
The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.
Analysis 2 · Same-company prescribing overlap
Drugs reported in other payments from the same company that also appear in Medicare Part D
This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | LUMIGAN open payments reported associated product |
CMS Open Payments — General Payments 25016 supporting records · 7645 recipient NPIs · example record 1201352548 |
Lumigan · 2024 Exact normalized brand match · 1 Part D row |
39 | 15 |
| Alcon Research LLC Exact reporting entity; no affiliate inference |
2025 | Rhopressa open payments reported associated product |
CMS Open Payments — General Payments 32 supporting records · 8 recipient NPIs · example record 1207325611 |
Rhopressa · 2024 Exact normalized brand match · 1 Part D row |
40 | 14 |
| Alcon Research LLC Exact reporting entity; no affiliate inference |
2025 | Rocklatan open payments reported associated product |
CMS Open Payments — General Payments 36 supporting records · 12 recipient NPIs · example record 1207325557 |
Rocklatan · 2024 Exact normalized brand match · 1 Part D row |
76 | 26 |
| Alcon Vision LLC Exact reporting entity; no affiliate inference |
2025 | Rhopressa open payments reported associated product |
CMS Open Payments — General Payments 1524 supporting records · 961 recipient NPIs · example record 1207357314 |
Rhopressa · 2024 Exact normalized brand match · 1 Part D row |
40 | 14 |
| Alcon Vision LLC Exact reporting entity; no affiliate inference |
2025 | Rocklatan open payments reported associated product |
CMS Open Payments — General Payments 12237 supporting records · 5351 recipient NPIs · example record 1207357016 |
Rocklatan · 2024 Exact normalized brand match · 1 Part D row |
76 | 26 |
| Alcon Vision LLC Exact reporting entity; no affiliate inference |
2025 | Simbrinza open payments reported associated product |
CMS Open Payments — General Payments 1563 supporting records · 637 recipient NPIs · example record 1207357100 |
Simbrinza · 2024 Exact normalized brand match · 1 Part D row |
43 | 12 |
| Bausch & Lomb Americas Inc. Exact reporting entity; no affiliate inference |
2025 | XIIDRA open payments reported associated product |
CMS Open Payments — General Payments 28163 supporting records · 11019 recipient NPIs · example record 1254730224 |
Xiidra · 2024 Exact normalized brand match · 1 Part D row |
43 | 17 |
These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.
Public Medicare Part D data
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Latanoprost | Latanoprost | 369 | 130 |
| Prednisolone Acetate | Prednisolone Acetate | 202 | 150 |
| Timolol Maleate | Timolol Maleate | 131 | 60 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 107 | 49 |
| Brimonidine Tartrate | Brimonidine Tartrate | 80 | 34 |
| Cyclosporine | Cyclosporine | 79 | 29 |
| Rocklatan | Netarsudil Mesylat/Latanoprost | 76 | 26 |
| Restasis | Cyclosporine | 65 | 28 |
| Tafluprost | Tafluprost/Pf | 51 | 13 |
| Methazolamide | Methazolamide | 49 | 12 |
| Ketorolac Tromethamine | Ketorolac Tromethamine | 48 | 35 |
| Brimonidine Tartrate-Timolol | Brimonidine Tartrate/Timolol | 44 | 21 |
| Simbrinza | Brinzolamide/Brimonidine Tart | 43 | 12 |
| Xiidra | Lifitegrast | 43 | 17 |
| Rhopressa | Netarsudil Mesylate | 40 | 14 |
| Lumigan | Bimatoprost | 39 | 15 |
| Dorzolamide-Timolol | Dorzolamide/Timolol/Pf | 36 | 11 |
| Acetazolamide | Acetazolamide | 29 | 11 |
| Dorzolamide Hcl | Dorzolamide Hcl | 26 | 14 |
| Erythromycin | Erythromycin Base | 26 | 11 |
| Azelastine Hcl | Azelastine Hcl | 24 | 16 |
| Tyrvaya | Varenicline Tartrate | 21 | suppressed |
| Combigan | Brimonidine Tartrate/Timolol | 20 | suppressed |
| Azopt | Brinzolamide | 17 | suppressed |
| Atropine Sulfate | Atropine Sulfate | 16 | suppressed |
| Brinzolamide | Brinzolamide | 16 | suppressed |
| Moxifloxacin | Moxifloxacin Hcl | 15 | suppressed |
| Acetazolamide Er | Acetazolamide | 12 | suppressed |
| Alphagan P | Brimonidine Tartrate | 12 | suppressed |
Timeline
Payment and prescribing data by year
Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $20,483.20 · 49 records | Alcon Vision LLC | ARGOS, Clareon, DURYSTA, HYDRUS Microstent, MIEBO, NGENUITY, OMNI SURGICAL SYSTEM, Rocklatan, SION SURGICAL INSTRUMENT, VYZULTA, Voyager DSLT, XEN GLAUCOMA TREATMENT SYSTEM, iDoseTR, iStent infinite | 7 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Rocklatan play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with ABBVIE INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| CMS Open Payments — General Payments | 2025 | 2026-06-30 | Original source |
| Medicare Part D Prescribers by Provider and Drug | 2024 | 2026-05-06 | Original source |
| NPPES Data Dissemination V2 | current / reference data | 2026-08-10 | Original source |
Full methodology · Questions & answers · Report a possible error