TUAN A DOAN
Allopathic & Osteopathic Physicians|Family Medicine WILLIAMS, CA NPI 1831200526
Browse related groups: Allopathic & Osteopathic Physicians|Family Medicine CA Neurocrine BioSciences, Inc. All categories
General Payments — all program years on this page
$1,857.88
- Category: General Payments
- Program years: PY2018–2024
- Record count: 82
- As of (CMS publication): 2026-01-23
Latest program year (PY2024): $316.79 across 12 records · disputed records: 0
Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.
How this figure is 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
Latest program year (PY2024) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $316.79 | 12 |
By paying entity
Latest program year (PY2024) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| Neurocrine BioSciences, Inc. | $169.47 | 4 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $41.93 | 2 |
| ABBVIE INC. | $33.60 | 2 |
| Exact Sciences Corporation | $23.72 | 1 |
| Acerta Pharma LLC | $19.47 | 1 |
| Lilly USA, LLC | $14.71 | 1 |
| Cranial Technologies, Inc | $13.89 | 1 |
By program year
Records — PY2024 (12)
Provenance & corrections
- Dataset: CMS Open Payments — General Payments
- Source: CMS Open Payments dataset (bulk file)
- Publisher of source data: Centers for Medicare & Medicaid Services
- Generated from: OP_DTL_GNRL_PGYR2024_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.
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.