Katherine Williamson
Pediatrics · Lake Forest, CANPI 1982916375
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 99.2% of the total across 102 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 25 manufacturers, the largest accounting for just 14.7% — the pattern of someone who eats at a lot of different presentations. 2025 is the largest year on record at $558, 4.0 times the $138 reported in 2019. Among pediatrics clinicians in CA 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 102 payments — averaging $22.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ironshore Pharmaceuticals Inc.$336
- Merck$238
- GSK$225
- Cognoa, Inc.$166
- Sanofi Pasteur Inc.$166
- Kaleo, Inc.$149
- plus $1K from 19 others
What the payments were for
- Food & beverage$2,27299%
- Gifts$181%
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 |
|---|---|---|
| Ironshore Pharmaceuticals Inc. | 15 | $336 |
| Merck | 15 | $238 |
| GSK | 8 | $225 |
| Cognoa, Inc. | 2 | $166 |
| Sanofi Pasteur Inc. | 8 | $166 |
| Kaleo, Inc. | 9 | $149 |
| Adlon Therapeutics L.p. | 7 | $133 |
| Sanofi-aventis U.S. LLC | 5 | $106 |
| Pfizer | 4 | $104 |
| Tris Pharma Inc | 4 | $99 |
| Alk-abello, Inc | 3 | $84 |
| Mirum Pharmaceuticals, Inc. | 2 | $80 |
| ARS Pharmaceuticals Operations, Inc. | 3 | $73 |
| Supernus Pharmaceuticals, Inc. | 2 | $53 |
| Cranial Technologies, Inc | 3 | $50 |
| Verrica Pharmaceuticals Inc. | 2 | $40 |
| Neos Therapeutics, LP | 2 | $33 |
| Corium, LLC | 1 | $24 |
| Biomarin Pharmaceutical Inc. | 1 | $23 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $22 |
| Vertical Pharmaceuticals, LLC | 1 | $22 |
| Collegium Pharmaceutical, Inc. | 1 | $19 |
| AbbVie | 1 | $15 |
| Axonics, Inc. | 1 | $15 |
| Kowa Pharmaceuticals America, Inc. | 1 | $14 |
How this compares
$2,291 in reported general payments places this provider in the 95th percentile of 5,539 pediatrics providers in California.
Other pediatrics in Lake Forest
- Eric BallLake Forest$18K
- Laurene MascolaLos Angeles$451K
- Tonya ChaffeeSan Francisco$359K
- Anthony PortaleSan Francisco$354K
- David KesslerSan Francisco$335K
- Lawrence SherRolling Hills Estates$297K
- Steven BlackOakland$228K
- Jonathan StroberSan Francisco$164K
- Hasmukh AminBakersfield$140K
- Colleen KraftNewport Beach$122K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.