John Parker, PA
Physician Assistant · Grand Rapids, MINPI 1124100508
Payments from drug & device makers
Across 72 payments — averaging $31.22 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Jazz Pharmaceuticals Inc.$1K
- Harmony Biosciences LLC$499
- Axsome Therapeutics, Inc.$442
- Avadel CNS Pharmaceuticals, LLC$57
- Idorsia Pharmaceuticals US Inc$48
- Resmed Corp$36
- plus $24 from 1 others
What the payments were for
- Food & beverage$2,01490%
- Education$23410%
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 |
|---|---|---|
| Jazz Pharmaceuticals Inc. | 31 | $1,141 |
| Harmony Biosciences LLC | 19 | $499 |
| Axsome Therapeutics, Inc. | 13 | $442 |
| Avadel CNS Pharmaceuticals, LLC | 3 | $57 |
| Idorsia Pharmaceuticals US Inc | 3 | $48 |
| Resmed Corp | 2 | $36 |
| ZOLL Respicardia, Inc. | 1 | $24 |
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
$2,248 in reported general payments places this provider in the 85th percentile of 5,453 physician assistant providers in Michigan.
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 |
|---|---|---|
| Ramelteon | 13 | $1,878 |
| Modafinil | 24 | $709 |
| Gabapentin | 61 | $649 |
| Dextroamphetamine-Amphet ErDextroamphetamine/Amphetamine | 11 | $381 |
| Fluticasone Propionate | 34 | $378 |
| Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine | 16 | $359 |
| Doxepin Hcl | 22 | $343 |
| Zolpidem Tartrate ErZolpidem Tartrate | 12 | $342 |
| Methylphenidate Hcl | 14 | $260 |
| Pramipexole DihydrochloridePramipexole Di-Hcl | 13 | $251 |
| Temazepam | 13 | $146 |
| Trazodone Hcl | 27 | $95 |
| Clonazepam | 13 | $61 |
| Zolpidem Tartrate | 13 | $59 |
Paid to pharmacies, not to this prescriber.
Other physician assistant in Grand Rapids
- Erin van DykeGrand Rapids$346K
- Melissa JosephGrand Rapids$82K
- Matthew SchultzGrand Rapids$49K
- Shannon ToddGrand Rapids$32K
- Patrick HandlinGrand Rapids$28K
- John MulderGrand Rapids$27K
- Ginger BiesbrockGrand Rapids$25K
- Matthew ZoetemanGrand Rapids$23K
- Aaron ZarnoskyGrand Rapids$22K
- Sarang PatelRoyal Oak$660K
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.