Reflects CMS Open Payments as of 2026-07-26T04:22:22Z. CMS updates this data on an annual cycle, and corrections or successful disputes made at CMS may not yet appear here. The official CMS record is authoritative for the current state. View the official CMS record ↗
Covered recipient · General Payments record
MARGARET A CHANG
Allopathic & Osteopathic Physicians Ophthalmology Retina Specialist
A name match is not confirmation of identity. CMS publishes records for different people under similar names; the NPI, specialty, and location shown on this page are the CMS-published fields that distinguish them.
General Payments · PY2019–2025
- CMS publication 2026-06-30
Other CMS categories — not shown on this page
Research Payments
CMS also publishes Research Payments as a separate dataset. This site does not currently mirror it, and no research figure is shown on this page. This provider appears in that dataset.
“If you are a physician who served as a principal investigator on a research study, you may see the payments associated with that research study listed under your name. This does not necessarily mean the payments are attributed to you. The dollar amount of the record corresponds to the total payment; the amounts are not attributed to each individual on the record.”
— Centers for Medicare & Medicaid Services, Open Payments Frequently Asked Questions, FAQ #12224
These records are published by CMS and can be viewed on this provider’s official CMS record. View this provider on CMS Open Payments ↗
“Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.”
— Centers for Medicare & Medicaid Services, Open Payments
A reported payment reflects a financial relationship a company disclosed. It does not indicate wrongdoing or a conflict of interest, and it says nothing about the quality of a provider's care.
These records are submitted to CMS and attested to by the reporting companies. CMS publishes them as reported; this site mirrors them without independent verification.
A payment attributed to a provider may have been made to a third party — a hospital, practice, or research institution — rather than paid to the provider personally.
How these totals are calculated
- This total is the sum of the individual General Payments record amounts CMS published for the labeled program year(s); each record amount is used unmodified. The total itself is computed by this site. Nothing is estimated, weighted, or combined across categories.
- General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
- Featured-page threshold (a presentation gate, not a judgment): (records>=3 OR total>=100) AND records>=2 AND NPI identity (all years).
- Methodology & Data — sourcing, labeling, and limitations.
By nature of payment
PY2025 · sorted by reported total
| Nature of payment | Amount | Records |
|---|---|---|
| Consulting Fee | $51,441.33 | 23 |
| Travel and Lodging | $17,662.29 | 7 |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $8,470.00 | 4 |
| Compensation for serving as faculty or as a speaker for a medical education program | $2,500.00 | 1 |
| Food and Beverage | $2,327.25 | 47 |
By paying entity
PY2025 · sorted by reported total
| Paying entity | Amount | Records |
|---|---|---|
| Genentech USA, Inc. | $23,081.03 | 17 |
| Roche Products Limited | $17,708.78 | 5 |
| Boehringer Ingelheim International GmbH | $17,561.79 | 11 |
| Genentech, Inc. | $11,162.40 | 5 |
| Ocular Therapeutix, Inc. | $10,960.07 | 13 |
| Apellis Pharmaceuticals, Inc. | $1,014.60 | 11 |
| Astellas Pharma US Inc | $262.65 | 8 |
| Regeneron Pharmaceuticals, Inc. | $203.48 | 3 |
| Amgen Inc. | $165.15 | 2 |
| Harrow Eye, LLC | $133.02 | 2 |
| Mallinckrodt Hospital Products Inc. | $60.06 | 2 |
| Astellas Pharma Global Development | $29.56 | 1 |
| ABBVIE INC. | $29.28 | 1 |
| ANI Pharmaceuticals, Inc. | $29.00 | 1 |
By program year
All program years on this page · sorted by year
Payment records · PY2025 (82)
Ordering applied by this site (date, newest first, then paying entity) · record values are shown as CMS published them
Source & provenance
- Dataset
- CMS Open Payments — General Payments
- Publisher of source data
- Centers for Medicare & Medicaid Services
- CMS publication date
- 2026-06-30
- Program years on this page
- 2019, 2020, 2021, 2022, 2023, 2024, 2025
- Source files
- Dataset page · Bulk file · PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024 , PY2025
- Generated from
- OP_DTL_GNRL_PGYR2025_P06302026_06032026.csv
One page per canonical provider; split Profile_IDs are merged via Associated_Covered_Recipient_Profile_ID_1/_2 from the Covered Recipient Profile Supplement.
Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.
Cite this record.
Permalink https://industrypayments.org/provider/npi-1477504405
- Plain
- MARGARET A CHANG, NPI 1477504405. IndustryPayments, data edition 2026-07-26T04:22:22Z. https://industrypayments.org/provider/npi-1477504405.
- APA 7
- IndustryPayments. (2026). MARGARET A CHANG, NPI 1477504405 (Data edition 2026-07-26T04:22:22Z) [Data set]. https://industrypayments.org/provider/npi-1477504405
- Bluebook
- MARGARET A CHANG, NPI 1477504405, IndustryPayments (data edition 2026-07-26T04:22:22Z), https://industrypayments.org/provider/npi-1477504405.
Source: Centers for Medicare & Medicaid Services, Open Payments.