Covered recipient · General Payments record
MICHAEL CHANG
Allopathic & Osteopathic Physicians Psychiatry & Neurology Psychiatry
General Payments · PY2018–2021
$613.96
- Reported across 31 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
PY2021 · sorted by reported total
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $434.70 | 21 |
By paying entity
PY2021 · sorted by reported total
| Paying entity | Amount | Records |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $163.80 | 6 |
| ITI, Inc. | $155.88 | 7 |
| Sunovion Pharmaceuticals Inc. | $115.02 | 8 |
By program year
All program years on this page · sorted by year
Payment records · PY2021 (21)
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
- 2018, 2019, 2021
- Source files
- Dataset page · Bulk file · PY2018 , PY2019 , PY2021
- Generated from
- OP_DTL_GNRL_PGYR2021_P01232026_01102026.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.
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