WILLIAM L YAP
Allopathic & Osteopathic Physicians|Internal Medicine|Rheumatology BALTIMORE, MD NPI 1568438802
Browse related groups: Allopathic & Osteopathic Physicians|Internal Medicine|Rheumatology MD ABBVIE INC. All categories
General Payments — all program years on this page
$17,850.05
- Category: General Payments
- Program years: PY2018–2021
- Record count: 267
- As of (CMS publication): 2026-01-23
Latest program year (PY2021): $729.80 across 30 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 (PY2021) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $729.80 | 30 |
By paying entity
Latest program year (PY2021) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| ABBVIE INC. | $314.69 | 14 |
| Amgen Inc. | $204.09 | 8 |
| NOVARTIS PHARMACEUTICALS CORPORATION | $65.83 | 3 |
| Janssen Biotech, Inc. | $65.41 | 2 |
| E.R. Squibb & Sons, L.L.C. | $54.78 | 2 |
| PFIZER INC. | $25.00 | 1 |
By program year
Records — PY2021 (30)
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_PGYR2021_P01232026_01102026.csv
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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.