Physician profile

Mark D Fleming

Hematology (Pathology) · Boston, MA

NPI 1235148404

$44,279.98

in general payments reported to CMS, 2019-2025

8 companies · $20K in 2025

The $20K reported for 2025 was more than what 94% of Hematology (Pathology) providers received nationally (typical 2025 total: $118).

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)
Consulting Fee$29,250.00
Food and Beverage$229.73

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
X4 Pharmaceuticals, INC. $20,250.00 2025 Xolremdi
Vertex Pharmaceuticals Incorporated $19,500.00 2022-2024
Novartis Pharmaceuticals Corporation $3,200.00 2019
Takeda Pharmaceuticals U.S.A., INC. $500.00 2019
Dentsply Sirona INC $447.61 2022
Innovation Technologies INC $163.21 2023 Irrisept
Tactile Systems Technology INC $152.64 2022
Karl Storz Endoscopy-America $66.52 2025 Hopkins

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

Mark D Fleming

$44,279.98

in general payments reported 2019-2025

Years
2019-2025
Top company
X4 Pharmaceuticals, INC.
Context
The $20K reported for 2025 was more than what 94% of Hematology (Pathology) providers received nationally (typical 2025 total: $118).

https://glasscript.com/doctor/237627/mark-d-fleming

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.