Christopher O'Brien, PA
Physician Assistant · Philadelphia, PANPI 1275125262
Payments from drug & device makers
Across 53 payments — averaging $13.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novo Nordisk$293
- AbbVie$61
- Eisai Inc.$58
- Lilly USA, LLC$54
- AstraZeneca$39
- Biohaven Pharmaceutical Holding Company Ltd.$35
- plus $157 from 7 others
What the payments were for
- Food & beverage$68498%
- Education$142%
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 |
|---|---|---|
| Novo Nordisk | 29 | $293 |
| AbbVie | 4 | $61 |
| Eisai Inc. | 3 | $58 |
| Lilly USA, LLC | 3 | $54 |
| AstraZeneca | 3 | $39 |
| Biohaven Pharmaceutical Holding Company Ltd. | 2 | $35 |
| Bayer | 2 | $33 |
| Amgen | 2 | $31 |
| Esperion Therapeutics, Inc. | 1 | $22 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $22 |
| GSK | 1 | $18 |
| Biohaven Pharmaceuticals, Inc. | 1 | $17 |
| Kowa Pharmaceuticals America, Inc. | 1 | $13 |
How this compares
$698 in reported general payments places this provider in the 70th percentile of 6,643 physician assistant providers in Pennsylvania.
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 |
|---|---|---|
| Doxycycline Hyclate | 215 | $1,803 |
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 126 | $1,082 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 37 | $649 |
| Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst | 67 | $584 |
| Azithromycin | 120 | $534 |
| Methylprednisolone | 70 | $515 |
| Oseltamivir Phosphate | 20 | $360 |
| Fluticasone Propionate | 34 | $319 |
| Cefdinir | 17 | $311 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 60 | $285 |
| Ciprofloxacin Hcl | 44 | $232 |
| Ketoconazole | 12 | $224 |
| Mupirocin | 29 | $215 |
| ValacyclovirValacyclovir Hcl | 15 | $202 |
| Prednisone | 123 | $168 |
Paid to pharmacies, not to this prescriber.
Other physician assistant in Philadelphia
- Melissa FerrariPhiladelphia$223K
- Alvin KingcadePhiladelphia$101K
- Trevor BonneyPhiladelphia$44K
- Ashwin GuptaPhiladelphia$33K
- Christopher EsworthyPhiladelphia$31K
- Carolyn ZawislakPhiladelphia$29K
- Kristen JonesPhiladelphia$22K
- Simone HoldenPhiladelphia$17K
- Erin CrownState College$1.5M
- Tricia BootsCranberry Twp$313K
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.