Seth Callahan, PA
Physician Assistant · Newark, DENPI 1548833577
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $4,625 of the $7,254 with a category attached, or 63.8%. 15 manufacturers reported payments, led by Liberty Surgical Inc. at 28.6% of the total. Reporting peaked in 2021 at $3,239 and has fallen 78.1% since, to $711 in 2025. Among physician assistant clinicians in DE 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 98 payments — averaging $74.02 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Liberty Surgical Inc.$2K
- Eclipse Technology Solutions Inc.$1K
- Arthrex$1K
- Davol Inc.$769
- Smith+Nephew$658
- Amgen$319
- plus $711 from 9 others
What the payments were for
- Travel & lodging$2293%
- Food & beverage$4,62564%
- Education$2,40033%
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 |
|---|---|---|
| Liberty Surgical Inc. | 11 | $2,074 |
| Eclipse Technology Solutions Inc. | 25 | $1,451 |
| Arthrex | 3 | $1,272 |
| Davol Inc. | 11 | $769 |
| Smith+Nephew | 10 | $658 |
| Amgen | 17 | $319 |
| Baxter Healthcare | 3 | $126 |
| Axogen | 2 | $122 |
| Stryker | 3 | $116 |
| Pacira Pharmaceuticals Incorporated | 4 | $99 |
| Johnson & Johnson | 3 | $97 |
| Bioventus LLC | 3 | $55 |
| Si-bone, Inc. | 1 | $47 |
| Vertex | 1 | $32 |
| KCI USA, Inc. | 1 | $17 |
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
$7,254 in reported general payments places this provider in the 95th percentile of 527 physician assistant providers in Delaware.
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 |
|---|---|---|
| Celecoxib | 87 | $2,035 |
| Doxycycline Monohydrate | 68 | $1,064 |
| Oxycodone Hcl | 180 | $986 |
| Gabapentin | 168 | $780 |
| Methylprednisolone | 63 | $429 |
| Meloxicam | 42 | $340 |
| Cyclobenzaprine Hcl | 24 | $163 |
| Mupirocin | 22 | $153 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 14 | $99 |
| Tramadol Hcl | 33 | $81 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 16 | $64 |
| Cephalexin | 22 | $44 |
Paid to pharmacies, not to this prescriber.
Other physician assistant in Newark
- Vi BanhNewark$12K
- Alexandra KrochtaNewark$9K
- Nicole Wotus-SilvestriNewark$7K
- Kalyn MozulayNewark$5K
- Emma Ellman-GrovesNewark$4K
- Katherine PeisochenskeNewark$4K
- Victoria AtchisonNewark$4K
- Shakara SmithNewark$3K
- Aimee FongNewark$3K
- Daniella BensonNewark$3K
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.