Physician profile

Nicholas Hartog

Allergy & Immunology · Grand Rapids, MI

NPI 1669766325

$575,152.56

in general payments reported to CMS, 2019-2025

30 companies · $98K in 2025

The $98K reported for 2025 was more than what 98% of Allergy & Immunology providers received nationally (typical 2025 total: $1,138).

See the full distribution for Allergy & Immunology

Payments by year

General and research 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)
Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program$159,634.02
Consulting Fee$130,353.53
Honoraria$45,558.75
Travel and Lodging$40,986.27
Food and Beverage$8,913.07
Education$110.92

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. Research payments are listed separately below. Product names cover 2023-2025.

CompanyGeneral paymentsYearsTop products
Pharming Healthcare, INC. $165,747.88 2020-2025 Joenja, Ruconest
Horizon Therapeutics Plc $151,865.38 2019-2023 Actimmune
Takeda Pharmaceuticals U.S.A., INC. $131,240.11 2021-2025 Cuvitru, Hyqvia
Amgen INC. $80,287.90 2022-2025 Actimmune, Tezspire
Chiesi USA, INC. $12,833.88 2023 Revcovi
Adma Biomanufacturing LLC $8,537.09 2022-2025
Shire North American Group INC $8,522.73 2019
X4 Pharmaceuticals, INC. $5,220.54 2024 Xolremdi
The Binding Site INC. $3,704.83 2021
Regeneron Healthcare Solutions, INC. $2,437.47 2019-2025 Dupixent
Genentech USA, INC. $1,812.65 2020-2025 Xolair
Astrazeneca Pharmaceuticals LP $667.27 2019-2025 Tezspire, Fasenra
Glaxosmithkline, LLC. $432.13 2019-2025 Nucala
Sobi, INC $407.13 2023-2024
Grifols USA, LLC $245.92 2023-2025 Xembify, Gamunex-C, Prolastin-C Liquid
Show all 30 companies
CompanyGeneral paymentsYearsTop products
Genzyme Corporation $232.55 2022-2025
Csl Behring $202.84 2019-2025 Hizentra
Pfizer INC. $160.00 2023-2025
Novartis Pharmaceuticals Corporation $124.27 2023-2025
Grifols Shared Services North America, INC. $112.00 2025 Gamunex-C
Ars Pharmaceuticals Operations, INC. $76.93 2025 Neffy
E.R. Squibb & Sons, L.L.C. $60.47 2025 Orencia
Alk-Abello, INC $54.30 2022-2023 Ragwitek, Grastek, Odactra
Sumitomo Pharma America, INC. $50.00 2023 Rethymic
Genentech, INC. $35.80 2023 Xolair
Blueprint Medicines Corporation $24.89 2024 Ayvakit
Kaleo, INC. $16.30 2023 Auvi-Q
Vapotherm INC $15.91 2021
Lilly USA, LLC $15.51 2024 Ebglyss
Bio Products Laboratory USA, INC. $7.88 2022

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.

Research and ownership

$2,762.50 in research payments reported 2019-2025. Research payments are often institution-directed and tied to clinical trials: they are reported under a clinician's name but frequently go to a hospital or research organization, and usually reflect participation in medical research.

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Payment summary

Nicholas Hartog

$575,152.56

in general payments reported 2019-2025

Years
2019-2025
Top company
Pharming Healthcare, INC.
Context
The $98K reported for 2025 was more than what 98% of Allergy & Immunology providers received nationally (typical 2025 total: $1,138).

https://glasscript.com/doctor/496381/nicholas-hartog

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.