Physician profile

Douglas Thomas Johnston

Allergy & Immunology · Greenville, SC

NPI 1124048079

$329,452.84

in general payments reported to CMS, 2019-2025

34 companies · none reported in 2025

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$20.88

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
Shire North American Group INC $107,539.75 2019
Takeda Pharmaceuticals U.S.A., INC. $70,725.78 2020-2022
Pharming Healthcare, INC. $47,727.62 2019-2022
Csl Behring $32,016.68 2019-2022
Biocryst Pharmaceuticals, INC. $28,663.71 2019-2021
Biocryst US Sales Co., LLC $12,423.60 2021-2022
Aimmune Therapeutics, INC. $11,887.50 2020
Astrazeneca Pharmaceuticals Lp $7,342.76 2019-2022
Pfizer INC. $4,691.34 2019-2021
Genentech USA, INC. $2,306.13 2019-2021
Adare Pharmaceuticals, INC. $1,457.84 2020
Glaxosmithkline, LLC. $689.88 2019-2022
Kaleo, INC. $419.36 2019-2022
Genzyme Corporation $312.84 2019-2022
Covis Pharma Gmbh $246.12 2021-2022
Show all 31 companies
CompanyGeneral paymentsYearsTop products
Regeneron Healthcare Solutions, INC. $202.17 2019
Optinose US, INC. $182.89 2020-2021
Grifols USA, LLC $111.84 2021-2022
Alk-Abello, INC $106.71 2019-2021
Teva Pharmaceuticals USA, INC. $61.31 2020-2021
Novartis Pharmaceuticals Corporation $58.16 2019
Amgen INC. $54.81 2021-2022
Incyte Corporation $39.99 2021
Octapharma USA, INC. $36.13 2022
Phadia US INC. $32.84 2020
Gilead Sciences, INC. $22.88 2019
Horizon Therapeutics Plc $21.15 2020
Atricure, INC. $20.88 2023
Circassia INC. $18.91 2019
Mylan Specialty L.P. $16.00 2019
Neos Therapeutics, Lp $15.26 2021

3 companies reported research payments only; those appear in the research section below.

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

Douglas Thomas Johnston

$329,452.84

in general payments reported 2019-2025

Years
2019-2023
Top company
Shire North American Group INC

https://glasscript.com/doctor/5024/douglas-thomas-johnston

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.