William Hayduk, PA
Physician Assistant · Chicago, ILNPI 1821363870
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $10,984 of the $13,234 with a category attached, or 83.0%. 21 manufacturers reported payments, led by Electronic Waveform Lab, Inc. at 46.0% of the total. Reporting peaked in 2022 at $3,769 and has fallen 53.5% since, to $1,752 in 2025. Among physician assistant clinicians in IL with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 394 payments — averaging $33.59 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Electronic Waveform Lab, Inc.$6K
- Abbott$4K
- Pacira Pharmaceuticals Incorporated$1K
- AbbVie$1K
- Collegium Pharmaceutical, Inc.$249
- Medtronic$80
- plus $549 from 15 others
What the payments were for
- Speaking & faculty fees$8006%
- Travel & lodging$1,45111%
- Food & beverage$10,98483%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Electronic Waveform Lab, Inc. | 253 | $6,086 |
| Abbott | 32 | $3,918 |
| Pacira Pharmaceuticals Incorporated | 9 | $1,216 |
| AbbVie(2 entities) | 59 | $1,136 |
| Collegium Pharmaceutical, Inc. | 14 | $249 |
| Medtronic | 2 | $80 |
| Nalu Medical, Inc. | 1 | $71 |
| Pfizer | 4 | $69 |
| Biohaven Pharmaceutical Holding Company Ltd. | 3 | $62 |
| Bioventus LLC | 1 | $53 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 3 | $47 |
| Johnson & Johnson | 2 | $43 |
| Vertex | 1 | $29 |
| Kowa Pharmaceuticals America, Inc. | 2 | $28 |
| Biodelivery Sciences International, Inc. | 2 | $26 |
| Valinor Pharma, LLC | 1 | $24 |
| Avanos Medical | 1 | $22 |
| Biohaven Pharmaceuticals, Inc. | 1 | $21 |
| Stratus Medical, LLC | 1 | $20 |
| Redhill Biopharma Inc. | 1 | $19 |
| Curonix LLC | 1 | $14 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$13,234 in reported general payments places this provider in the 95th percentile of 3,912 physician assistant providers in Illinois.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 389 | $16,455 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 70 | $3,561 |
| Morphine Sulfate ErMorphine Sulfate | 45 | $1,812 |
| Oxycodone Hcl | 34 | $1,070 |
| Lidocaine | 13 | $1,019 |
| Carisoprodol | 17 | $664 |
| Gabapentin | 37 | $663 |
| Acetaminophen-CodeineAcetaminophen With Codeine | 30 | $607 |
| Pregabalin | 28 | $543 |
| Cyclobenzaprine Hcl | 57 | $522 |
| Alprazolam | 32 | $454 |
| Baclofen | 24 | $370 |
| Tramadol Hcl | 54 | $260 |
| Ibuprofen | 13 | $71 |
| Meloxicam | 14 | $15 |
Paid to pharmacies, not to this prescriber.
Other physician assistant in Chicago
- Andrew MastroChicago$419K
- Renata BlockChicago$103K
- Margaret RomanoChicago$82K
- Christina StarksChicago$77K
- Kelly OconnorChicago$36K
- Christa CooperChicago$36K
- Audrey FenwickChicago$29K
- Amy LadewskiChicago$29K
- Lindsey KalhagenChicago$21K
- Jessica KarlChicago$18K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.