Margaret Castor
Obstetrics & Gynecology · Phoenix, AZNPI 1275960585
Payments from drug & device makers
Across 73 payments — averaging $16.17 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Mayne Pharma Commercial LLC$215
- AbbVie$198
- Bayer$106
- Exeltis, USA Inc.$86
- Agile Therapeutics, Inc.$81
- Biogen$74
- plus $421 from 16 others
What the payments were for
- Food & beverage$1,180100%
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 |
|---|---|---|
| Mayne Pharma Commercial LLC | 10 | $215 |
| AbbVie | 17 | $198 |
| Bayer | 7 | $106 |
| Exeltis, USA Inc. | 6 | $86 |
| Agile Therapeutics, Inc. | 4 | $81 |
| Biogen | 3 | $74 |
| Myovant Sciences Inc. | 3 | $55 |
| Coopersurgical, Inc. | 3 | $42 |
| Sumitomo Pharma America, Inc. | 2 | $37 |
| Pfizer | 2 | $37 |
| Therapeuticsmd, Inc. | 3 | $34 |
| Organon | 2 | $34 |
| Hologic Sales And Service, LLC | 2 | $32 |
| Aspira Women's Health Inc | 1 | $22 |
| Avanos Medical | 1 | $21 |
| Millicent US Inc | 1 | $17 |
| Astellas Pharma US Inc | 1 | $17 |
| Gynesonics, Inc. | 1 | $16 |
| Exact Sciences | 1 | $15 |
| Daiichi Sankyo Inc. | 1 | $14 |
| Shield Therapeutics Inc | 1 | $14 |
| Avion Pharmaceuticals | 1 | $13 |
How this compares
$1,180 in reported general payments places this provider in the 60th percentile of 757 obstetrics & gynecology 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.
Other obstetrics & gynecology in Phoenix
- Charles PlimptonPhoenix$7.9M
- Valerie Sorkin WellsPhoenix$5M
- Nicholas BujakPhoenix$662K
- Steven NelsonPhoenix$159K
- Bj HoPhoenix$134K
- Dean CoonrodPhoenix$119K
- Chijioke SoribePhoenix$117K
- Heather ZechmanPhoenix$92K
- David GlassmanPhoenix$90K
- Meghan MacclearyPhoenix$87K
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.