Physician profile

Katherine Danielle Williamson

Pediatrics · Lake Forest, CA

NPI 1982916375

$2,290.76

in general payments reported to CMS, 2019-2025

25 companies · $558 in 2025

The $558 reported for 2025 was more than what 95% of Pediatrics providers received nationally (typical 2025 total: $96.93).

Payments by year

General payments by program year, as reported to CMS.

What the payments were for

Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.

View as a table
Payment typeAmount (2023-2025)
Food and Beverage$1,389.84

Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.

Who reported paying

General payments only, as reported to CMS. Product names cover 2023-2025.

CompanyGeneral paymentsYearsTop products
Ironshore Pharmaceuticals INC. $335.70 2019-2024 Jornay Pm
Merck Sharp & Dohme LLC $237.74 2019-2025 Vaxneuvance, Vaxelis, Gardasil 9
Glaxosmithkline, LLC. $225.45 2019-2025 Bexsero, Penmenvy
Cognoa, INC. $166.26 2022
Sanofi Pasteur INC. $165.86 2019-2025
Kaleo, INC. $148.96 2019-2023 Auvi-Q
Adlon Therapeutics L.P. $133.44 2020-2021
Sanofi-Aventis U.S. LLC $105.69 2024-2025
Pfizer INC. $104.35 2023-2025
Tris Pharma INC $98.59 2021-2024 Quillivant, Dyanavel Xr
Alk-Abello, INC $83.93 2025 Neffy
Mirum Pharmaceuticals, INC. $80.02 2025 Cholbam
Ars Pharmaceuticals Operations, INC. $73.35 2025 Neffy
Supernus Pharmaceuticals, INC. $53.01 2023-2024 Qelbree, Qelbree
Cranial Technologies, INC $50.01 2023-2025 Doc Band
Show all 25 companies
CompanyGeneral paymentsYearsTop products
Verrica Pharmaceuticals INC. $40.45 2024 Ycanth
Neos Therapeutics, LP $33.41 2025 Cotempla Xr-Odt
Corium, LLC $23.59 2022
Biomarin Pharmaceutical INC. $23.13 2024 Voxzogo 1.2mg
Takeda Pharmaceuticals U.S.A., INC. $22.33 2023 Elaprase
Vertical Pharmaceuticals, LLC $21.98 2024 Relexxii
Collegium Pharmaceutical, INC. $18.92 2025 Jornay Pm
Abbvie INC. $15.25 2020
Axonics, INC. $15.08 2023 Bulkamid
Kowa Pharmaceuticals America, INC. $14.26 2025 Zoryve

Drugs and devices associated with these payments

CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.

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Payment summary

Katherine Danielle Williamson

$2,290.76

in general payments reported 2019-2025

Years
2019-2025
Top company
Ironshore Pharmaceuticals INC.
Context
The $558 reported for 2025 was more than what 95% of Pediatrics providers received nationally (typical 2025 total: $96.93).

https://glasscript.com/doctor/705236/katherine-danielle-williamson

Source: CMS Open Payments, program years 2019-2025. Payments are legal and often routine.

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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.