Mary Horowitz
Milwaukee, WI. NPI 1356392195. Hematology & Oncology.
What was reported, 2019–2025
- $4.6 thousand
- General payments
- $4,647
- 17 separate payments. What they were, as CMS records them, is below.
- $0
- Research payments
- Funding for a study, usually paid to an institution with this doctor named on it. Not added to general payments, and not income.
- $0
- Ownership and investment
- The value of a stake this doctor or an immediate family member held.
- 0
- Disputed
- This doctor has contested none of the payments reported about them.
What the payments were
1 more column on a wider screen
| Nature of payment | Amount |
|---|---|
| Travel and Lodging | $2,205 |
| Food and Beverage | $1,765 |
| Honoraria | $575 |
| Gift | $103 |
Each payment as the manufacturer categorized it when reporting it to CMS, across 2019–2025. Together they are the general payments above. A category is the reporter’s, and nothing in the record says a payment in any of them was improper.
By program year
2 more columns on a wider screen
| Program year | General | Research |
|---|---|---|
| 2025 | $461 | $0 |
| 2024 | $2,961 | $0 |
| 2023 | $427 | $0 |
| 2022 | $695 | $0 |
| 2020 | $0 | $0 |
| 2019 | $102 | $0 |
CMS reports a program year at a time and also publishes its own total across them, which is what the figures above are. These rows are that total taken apart, not a second set of payments.
CMS’s file covers 2019–2025. It holds no payments to Mary Horowitz in 2021.
The record
- National Provider Identifier
- 1356392195
- The identifier this page is addressed by, and the one both CMS files share.
- Specialty
- Hematology & Oncology
- Allopathic & Osteopathic Physicians, in CMS's taxonomy.
- Licensed in
- WI
- The state of the license CMS lists first.
- Recipient type
- Covered Recipient Physician
- How CMS classifies the recipient of these payments.
Medicare prescribing
CMS holds no Part D record for NPI 1356392195 in the most recent year we hold, and that has two readings it does not distinguish between: this provider billed Medicare Part D for nothing that year, or they billed it for ten claims or fewer, which CMS removes from the file before publishing to protect the patients behind them. It does not mean the data is missing, and it does not mean this provider writes no prescriptions — anything paid for privately, by Medicaid, or by a patient is not in this file at all.
Elsewhere
- Payments to doctors in Wisconsin — what was reported across the state this doctor practises in.
- What drug and device companies pay doctors — the national picture these figures are part of.
- This record at CMS — the publisher’s own page for this profile.
- The NPI registry — who this identifier belongs to, at CMS.
Data retrieved
Sources
- Open Payments — payments grouped by physician — Centers for Medicare & Medicaid Services · U.S. Government work · retrieved September 25, 2026