Total Payments
$1,956
2024 Payments
$482.03
Companies
20
Transactions
89
Payment Breakdown by Category
Food & Beverage$1,914 (97.9%)
Other$23.52 (1.2%)
Gifts$18.40 (0.9%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $1,914 | 87 | 97.9% |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $23.52 | 1 | 1.2% |
| Gift | $18.40 | 1 | 0.9% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| IRONSHORE PHARMACEUTICALS INC. | $335.70 | 15 | $0 (2024) |
| GlaxoSmithKline, LLC. | $198.75 | 7 | $0 (2024) |
| Merck Sharp & Dohme LLC | $183.33 | 12 | $0 (2024) |
| kaleo, Inc. | $168.07 | 10 | $0 (2023) |
| Cognoa, Inc. | $166.26 | 2 | $0 (2022) |
| SANOFI PASTEUR INC. | $155.20 | 8 | $0 (2024) |
| Adlon Therapeutics L.P. | $133.44 | 7 | $0 (2021) |
| PFIZER INC. | $107.73 | 4 | $0 (2024) |
| Tris Pharma Inc | $98.59 | 4 | $0 (2024) |
| SANOFI-AVENTIS U.S. LLC | $83.23 | 4 | $0 (2024) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $482.03 | 21 | IRONSHORE PHARMACEUTICALS INC. ($111.84) |
| 2023 | $349.72 | 17 | Ironshore Pharmaceuticals Inc. ($74.69) |
| 2022 | $392.05 | 12 | Cognoa, Inc. ($166.26) |
| 2021 | $154.04 | 7 | Adlon Therapeutics L.P. ($65.73) |
| 2020 | $216.89 | 13 | Adlon Therapeutics L.P. ($67.71) |
| 2019 | $137.94 | 8 | Ironshore Pharmaceuticals Inc. ($53.19) |
| 2018 | $110.22 | 5 | PFIZER INC. ($44.01) |
| 2017 | $112.75 | 6 | Shire North American Group Inc ($45.15) |
All Payment Transactions
89 individual payment records from CMS Open Payments — Page 1 of 4
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/18/2024 | IRONSHORE PHARMACEUTICALS INC. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $17.80 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 11/14/2024 | SANOFI-AVENTIS U.S. LLC | TZIELD (Biological) | Food and Beverage | In-kind items and services | $23.08 | General |
| Category: Endocrine & Metabolic Diseases | ||||||
| 10/23/2024 | Vertical Pharmaceuticals, LLC | Relexxii (Drug) | Food and Beverage | In-kind items and services | $21.98 | General |
| Category: Neurology - ADHD medication | ||||||
| 10/07/2024 | SANOFI PASTEUR INC. | BEYFORTUS (Biological) | Food and Beverage | In-kind items and services | $30.09 | General |
| Category: Vaccines | ||||||
| 09/25/2024 | GlaxoSmithKline, LLC. | BEXSERO (Biological) | Food and Beverage | In-kind items and services | $29.40 | General |
| Category: VACCINES | ||||||
| 09/23/2024 | Merck Sharp & Dohme LLC | GARDASIL (Biological), VAXNEUVANCE, GARDASIL 9 | Food and Beverage | In-kind items and services | $14.00 | General |
| Category: VACCINE | ||||||
| 09/17/2024 | BioMarin Pharmaceutical Inc. | VOXZOGO 1.2mg (Drug) | Food and Beverage | In-kind items and services | $23.13 | General |
| Category: Achondroplasia | ||||||
| 08/21/2024 | SANOFI-AVENTIS U.S. LLC | TZIELD (Biological) | Food and Beverage | In-kind items and services | $22.44 | General |
| Category: Endocrine & Metabolic Diseases | ||||||
| 08/19/2024 | Verrica Pharmaceuticals Inc. | YCANTH (Drug) | Food and Beverage | In-kind items and services | $23.99 | General |
| Category: DERMATOLOGY | ||||||
| 06/12/2024 | SANOFI-AVENTIS U.S. LLC | TZIELD (Biological) | Food and Beverage | In-kind items and services | $19.38 | General |
| Category: Endocrine & Metabolic Diseases | ||||||
| 06/11/2024 | GlaxoSmithKline, LLC. | BEXSERO (Biological) | Food and Beverage | In-kind items and services | $30.38 | General |
| Category: VACCINES | ||||||
| 06/10/2024 | Merck Sharp & Dohme LLC | GARDASIL (Biological), VAXNEUVANCE, GARDASIL 9 | Food and Beverage | In-kind items and services | $20.79 | General |
| Category: VACCINE | ||||||
| 06/03/2024 | IRONSHORE PHARMACEUTICALS INC. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $21.15 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 05/23/2024 | Tris Pharma Inc | Quillivant (Drug) | Food and Beverage | In-kind items and services | $24.84 | General |
| Category: ADHD | ||||||
| 05/08/2024 | IRONSHORE PHARMACEUTICALS INC. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $22.92 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 04/18/2024 | Verrica Pharmaceuticals Inc. | YCANTH (Drug) | Food and Beverage | In-kind items and services | $16.46 | General |
| Category: DERMATOLOGY | ||||||
| 04/10/2024 | IRONSHORE PHARMACEUTICALS INC. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $25.00 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 03/27/2024 | SANOFI-AVENTIS U.S. LLC | TZIELD (Biological) | Food and Beverage | In-kind items and services | $18.33 | General |
| Category: Endocrine & Metabolic Diseases | ||||||
| 03/05/2024 | PFIZER INC. | PREVNAR 20 (Biological) | Food and Beverage | In-kind items and services | $23.81 | General |
| Category: VACCINES | ||||||
| 02/16/2024 | Supernus Pharmaceuticals, Inc. | Qelbree (Drug) | Food and Beverage | In-kind items and services | $28.09 | General |
| Category: VILOXAZINE HYDROCHLORIDE | ||||||
| 01/16/2024 | IRONSHORE PHARMACEUTICALS INC. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $24.97 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 12/06/2023 | Ironshore Pharmaceuticals Inc. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $22.49 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 11/15/2023 | Supernus Pharmaceuticals, Inc. | QELBREE (Drug) | Food and Beverage | Cash or cash equivalent | $24.92 | General |
| Category: PSYCHOLOGY | ||||||
| 11/01/2023 | Ironshore Pharmaceuticals Inc. | JORNAY PM (Drug) | Food and Beverage | Cash or cash equivalent | $27.49 | General |
| Category: CENTRAL NERVOUS SYSTEM STIMULANT | ||||||
| 10/16/2023 | SANOFI PASTEUR INC. | BEYFORTUS (Biological) | Food and Beverage | In-kind items and services | $13.05 | General |
| Category: Vaccines | ||||||
About Dr. Katherine Williamson, MD
Dr. Katherine Williamson, MD is a Pediatrics healthcare provider based in Lake Forest, California. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 07/14/2010. The National Provider Identifier (NPI) number assigned to this provider is 1982916375.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Katherine Williamson, MD has received a total of $1,956 in payments from pharmaceutical and medical device companies, with $482.03 received in 2024. These payments were reported across 89 transactions from 20 companies. The most common payment nature is "Food and Beverage" ($1,914).
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Practice Information
- Specialty Pediatrics
- Location Lake Forest, CA
- Active Since 07/14/2010
- Last Updated 01/17/2017
- Taxonomy Code 208000000X
- Entity Type Individual
- Practice Solo Practitioner
- NPI Number 1982916375
Products in Payments
- JORNAY PM (Drug) $282.51
- BEXSERO (Biological) $198.75
- Canvas Dx (Device) $166.26
- AUVI-Q (Drug) $148.96
- ADHANSIA XR (Drug) $133.44
- ROTATEQ (Biological) $89.06
- TZIELD (Biological) $83.23
- Doc Band (Device) $65.37
- Jornay PM 20mg capsules (Bottle of 100) (Drug) $53.19
- Dyanavel XR (Drug) $48.99
- GARDASIL 9 (Biological) $47.87
- BEYFORTUS (Biological) $43.14
- NO PRODUCT DISCUSSED (Drug) $41.54
- YCANTH (Drug) $40.45
- GARDASIL (Biological) $34.79
- MENACTRA (Drug) $33.12
- Qelbree (Drug) $28.09
- COMIRNATY (Biological) $26.02
- QELBREE (Drug) $24.92
- Quillivant (Drug) $24.84
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Data Sources
Provider data from NPPES. Payment data from CMS Open Payments. Medicare data from CMS Medicare Provider Utilization. All data is public and updated periodically.
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