Katherine Williamson, DO
Obstetrics & Gynecology · Cincinnati, OHNPI 1134530546
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,170 of the $1,936 with a category attached, or 60.4%. Intuitive Surgical accounts for 68.0% of it on its own, with 17 other manufacturers making up the rest. Reporting peaked in 2019 at $1,675 and has fallen 96.9% since, to $52 in 2024.
Across 49 payments — averaging $39.51 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$1K
- AbbVie$155
- Hologic Sales And Service, LLC$65
- Therapeuticsmd, Inc.$46
- Novo Nordisk$45
- AMAG Pharmaceuticals, Inc.$37
- plus $271 from 12 others
What the payments were for
- Travel & lodging$1,17060%
- Food & beverage$71837%
- Education$493%
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 | 12 | $1,316 |
| AbbVie | 7 | $155 |
| Hologic Sales And Service, LLC | 2 | $65 |
| Therapeuticsmd, Inc. | 3 | $46 |
| Novo Nordisk | 3 | $45 |
| AMAG Pharmaceuticals, Inc. | 3 | $37 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $37 |
| Pfizer | 3 | $36 |
| Merck | 2 | $30 |
| Medtronic | 1 | $29 |
| Sumitomo Pharma America, Inc. | 2 | $28 |
| Agile Therapeutics, Inc. | 1 | $23 |
| Sage Therapeutics, LLC | 1 | $18 |
| Shire North American Group Inc | 1 | $17 |
| Eisai Inc. | 1 | $15 |
| Bayer | 1 | $14 |
| Amgen | 1 | $13 |
| Coloplast | 1 | $11 |
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 Surgical System$1,069
How this compares
$1,936 in reported general payments places this provider in the 75th percentile of 1,376 obstetrics & gynecology providers in Ohio.
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 Cincinnati
- David SchwartzCincinnati$169K
- Gerard ReillyCincinnati$74K
- Michael KarramCincinnati$47K
- Sunbal JavaidCincinnati$32K
- James SosnowskiCincinnati$31K
- Gretchen FermannCincinnati$31K
- Rocco RossiCincinnati$18K
- Meredith PensakCincinnati$14K
- David DhanrajCincinnati$12K
- David SheynCincinnati$10K
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.