Covered recipient · General Payments record
ROGER S J CHANG
Allopathic & Osteopathic Physicians Internal Medicine
General Payments · PY2022–2024
$678.31
- Reported across 27 records
- CMS publication 2026-01-23
Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.
How these totals are calculated
- The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. 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 (all years).
- Methodology & Data — sourcing, labeling, and limitations.
By nature of payment
PY2024 · sorted by reported total
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $413.54 | 22 |
| Education | $61.99 | 1 |
By paying entity
PY2024 · sorted by reported total
| Paying entity | Amount | Records |
|---|---|---|
| Actelion Pharmaceuticals US, Inc. | $80.72 | 2 |
| Acerta Pharma LLC | $75.92 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $56.30 | 2 |
| Merck Sharp & Dohme Corporation | $55.23 | 3 |
| Regeneron Healthcare Solutions, Inc. | $39.94 | 2 |
| Exact Sciences Corporation | $25.03 | 1 |
| Ultragenyx Pharmaceutical Inc. | $23.85 | 1 |
| Insmed, Inc. | $19.60 | 1 |
| Alexion Pharmaceuticals, Inc. | $18.81 | 1 |
| GlaxoSmithKline, LLC. | $17.85 | 1 |
| Paratek Pharmaceuticals, Inc. | $17.34 | 1 |
| La Jolla Pharmaceutical Company | $15.28 | 1 |
| Takeda Pharmaceuticals U.S.A., Inc. | $14.95 | 1 |
| Retrophin, Inc. | $14.71 | 1 |
By program year
All program years on this page · sorted by year
Payment records · PY2024 (23)
Sorted by paying entity, then date · as published by CMS
Source & provenance
- Dataset
- CMS Open Payments — General Payments
- Publisher of source data
- Centers for Medicare & Medicaid Services
- CMS publication date
- 2026-01-23
- Program years on this page
- 2022, 2023, 2024
- Source files
- Dataset page · Bulk file · PY2022 , PY2023 , PY2024
- Generated from
- OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv
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