Stewart Mason, MD
Obstetrics & Gynecology · Fresno, CANPI 1871519835
Payments from drug & device makers
Across 261 payments — averaging $64.29 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$12K
- AbbVie$847
- Daiichi Sankyo Inc.$365
- Hologic Sales And Service, LLC$362
- Coopersurgical, Inc.$359
- Astellas Pharma US Inc$321
- plus $3K from 36 others
What the payments were for
- Speaking & faculty fees$8,00048%
- Travel & lodging$2,04612%
- Food & beverage$5,48833%
- Education$1,2237%
- Gifts$230%
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 |
|---|---|---|
| Intuitive Surgical | 17 | $11,901 |
| AbbVie(2 entities) | 53 | $847 |
| Daiichi Sankyo Inc. | 20 | $365 |
| Hologic Sales And Service, LLC | 12 | $362 |
| Coopersurgical, Inc. | 18 | $359 |
| Astellas Pharma US Inc | 9 | $321 |
| Sumitomo Pharma America, Inc. | 14 | $267 |
| Myovant Sciences Inc. | 15 | $222 |
| Dexcom, Inc. | 6 | $190 |
| Pfizer | 11 | $186 |
| Mayne Pharma Commercial LLC | 14 | $186 |
| Merz North America, Inc. | 1 | $154 |
| Organon | 7 | $154 |
| Bayer | 5 | $121 |
| Shield Therapeutics Inc | 5 | $96 |
| Evofem Biosciences, Inc. | 6 | $89 |
| Agile Therapeutics, Inc. | 4 | $87 |
| Therapeuticsmd, Inc. | 5 | $81 |
| Bard Access Systems, Inc. | 1 | $71 |
| Merck | 5 | $67 |
| Lupin Inc. | 5 | $58 |
| Optumhealth Care Solutions, LLC | 2 | $55 |
| Dysis Medical, Inc. | 1 | $53 |
| Avanos Medical | 2 | $50 |
| Minerva Surgical, Inc | 2 | $47 |
| Meditrina | 3 | $44 |
| Baxter Healthcare | 2 | $41 |
| Pacira Pharmaceuticals Incorporated | 1 | $37 |
| Smith+Nephew | 2 | $29 |
| KARL Storz Endoscopy-america | 1 | $27 |
| Scynexis, Inc. | 1 | $25 |
| Sage Therapeutics, LLC | 1 | $22 |
| Exeltis, USA Inc. | 1 | $21 |
| Johnson & Johnson | 1 | $20 |
| Davol Inc. | 1 | $18 |
| Qiagen, LLC | 1 | $17 |
| AMAG Pharmaceuticals, Inc. | 1 | $17 |
| BD | 1 | $17 |
| Aspira Women's Health Inc | 1 | $16 |
| Olympus America Inc. | 1 | $13 |
| Boston Scientific | 1 | $12 |
| Convatec Inc. | 1 | $12 |
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.
- DA VINCI SP$8,000
- Da Vinci Surgical System$2,688
- DAVINCI XI$1,000
- DEXCOM G6 TRANSMITTER$133
- ACESSA PROVU SYSTEM$114
How this compares
$16,780 in reported general payments places this provider in the 95th percentile of 3,784 obstetrics & gynecology providers in California.
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 |
|---|---|---|
| Estradiol | 66 | $2,754 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 16 | $113 |
Paid to pharmacies, not to this prescriber.
Other obstetrics & gynecology in Fresno
- Peyman BanooniBeverly Hills$9.2M
- Vellore BhupathyWhittier$4.3M
- Edwin RamirezOxnard$3.5M
- Nam TranSan Francisco$3M
- Dmitriy RomanenkoSouth Gate$2.7M
- Anita NelsonTorrance$2.1M
- Oleg BessLos Angeles$1.7M
- Rovena ReaganSan Diego$1.7M
- Dana Shippdel Mar$1.7M
- Vanessa JacobySan Francisco$1.3M
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.