Nathan van de Graaff
Physician Assistant · Phoenix, AZNPI 1215614037
Payments from drug & device makers
Across 123 payments — averaging $29.11 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)$397
- Pfizer$387
- Kestra Medical Technology Services, Inc.$362
- Merck$321
- E.r. Squibb & Sons, L.L.C.$310
- Abiomed$259
- plus $2K from 20 others
What the payments were for
- Food & beverage$3,580100%
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 |
|---|---|---|
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 11 | $397 |
| Pfizer | 14 | $387 |
| Kestra Medical Technology Services, Inc. | 12 | $362 |
| Merck | 13 | $321 |
| E.r. Squibb & Sons, L.L.C. | 9 | $310 |
| Abiomed | 2 | $259 |
| Boehringer Ingelheim | 9 | $211 |
| Novartis | 10 | $181 |
| Novo Nordisk | 3 | $157 |
| Actelion Pharmaceuticals US, Inc. | 2 | $151 |
| Bridgebio Pharma, Inc. | 4 | $121 |
| Alnylam Pharmaceuticals Inc. | 6 | $118 |
| AstraZeneca | 7 | $116 |
| ZOLL Circulation Inc | 1 | $103 |
| Amgen | 5 | $87 |
| ZOLL Respicardia, Inc. | 2 | $46 |
| Johnson & Johnson | 2 | $42 |
| Inspire Medical Systems, Inc. | 2 | $41 |
| Edwards Lifesciences | 1 | $34 |
| Kiniksa Pharmaceuticals International, PLC | 2 | $27 |
| Esperion Therapeutics, Inc. | 1 | $25 |
| Daiichi Sankyo Inc. | 1 | $22 |
| Bayer | 1 | $20 |
| Kiniksa Pharmaceuticals, Ltd. | 1 | $17 |
| Angiodynamics, Inc. | 1 | $14 |
| Lexicon Pharmaceuticals, Inc. | 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.
- LifeVest$208
- CAMZYOS$126
- ELIQUIS$125
- UPTRAVI$125
- OPSUMIT$125
- Assure WCD$111
- TherOx DS2 Console$103
- Catheter$103
- Downstream Cartridge$103
How this compares
$3,580 in reported general payments places this provider in the 85th percentile of 2,888 physician assistant providers in Arizona.
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 |
|---|---|---|
| EliquisApixaban | 79 | $87,537 |
| Repatha SureclickEvolocumab | 27 | $14,835 |
| EntrestoSacubitril/Valsartan | 11 | $12,413 |
| MultaqDronedarone Hcl | 11 | $10,092 |
| FarxigaDapagliflozin Propanediol | 11 | $9,144 |
| Ezetimibe | 37 | $1,620 |
| Potassium Chloride | 49 | $1,199 |
| Atorvastatin Calcium | 137 | $1,112 |
| Metoprolol Succinate | 107 | $1,078 |
| Losartan Potassium | 100 | $1,055 |
| Carvedilol | 71 | $806 |
| Rosuvastatin Calcium | 52 | $749 |
| ClopidogrelClopidogrel Bisulfate | 65 | $620 |
| Amlodipine Besylate | 83 | $500 |
| Valsartan | 13 | $391 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| PfizerEliquis | $387 | $87,53779 claims |
| NovartisEntresto | $181 | $12,41311 claims |
| AstraZenecaFarxiga | $116 | $9,14411 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 85th percentile of 2,888 physician assistant providers in Arizona.
Other physician assistant in Phoenix
- Alyssa BoschenPhoenix$86K
- Katherine MinorPhoenix$76K
- Micah LasleyPhoenix$52K
- Thomas SirrinePhoenix$37K
- Karla HortonPhoenix$36K
- Larissa AnthonyPhoenix$32K
- Tana FrumentoPhoenix$25K
- Rosemary SrisukPhoenix$17K
- John DorseyPhoenix$17K
- Kendall SmithPhoenix$16K
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.