Who Paid My Doc
Ralph Weichselbaum
Radiation Oncology Chicago, IL Medical Doctor
NPI 1578510749 CMS profile 664361
5758 S Maryland Ave, Mc9006, Chicago, IL 60637
General payments
$10,520
Research payments
$0
Ownership & investment interest
$541,904
Research they led as principal investigator
$608,088
Through program year 2021, Ralph Weichselbaum of Chicago, IL is reported in the CMS Open Payments database as having received $10,520 across 8 general payments and $0 in research payments paid to them. Separately, studies naming them as principal investigator received $608,088 in research payments, paid to institutions rather than to them. They also declared ownership or investment interests valued at $541,904 across 25 holdings.
No combined total General, research and ownership are kept apart. Each is reported under its own rules, and ownership is not money that moved at all but the value of a stake held. A meal, a clinical trial grant and a shareholding do not add up to anything meaningful, so this site does not add them. The principal-investigator line is research money paid to institutions for studies they led — not to them — and is not added to anything either.
General payments for this record sit in the 91st percentile of Radiation Oncology profiles with reported payments. Percentile describes the distribution, not the conduct.
By program year
8 rows| Year | Kind | Relative to this record's peak year | Amount | Records |
|---|---|---|---|---|
| 2021 | General | $945 | 1 | |
| 2020 | General | $3,750 | 1 | |
| 2019 | General | $5,825 | 6 | |
| 2025 | Ownership | $37,925 | 5 | |
| 2023 | Ownership | $37,931 | 7 | |
| 2022 | Ownership | $173,824 | 5 | |
| 2021 | Ownership | $173,288 | 5 | |
| 2020 | Ownership | $118,936 | 3 |
Beside peers
- Ralph Weichselbaum
- Radiation Oncology median
- Middle half of Radiation Oncology
- National median
In program year 2025, general payments to Ralph Weichselbaum were reported at $0. Among 3,409 Radiation Oncology profiles paid that year, the median was $172 and the middle half received between $61 and $514.
Show as a table
| Year | Ralph Weichselbaum | Radiation Oncology median | Middle half | National median |
|---|---|---|---|---|
| 2019 | $5,825 | $138 | $48–$462 | $163 |
| 2020 | $3,750 | $79 | $26–$262 | $114 |
| 2021 | $945 | $119 | $37–$358 | $132 |
| 2022 | $0 | $139 | $43–$424 | $149 |
| 2023 | $0 | $167 | $57–$473 | $160 |
| 2024 | $0 | $168 | $56–$541 | $164 |
| 2025 | $0 | $172 | $61–$514 | $169 |
Breakdown
Records
8 reportedEvery payment, record by record
Date, company, amount, what it was for and the product named — filter by year, kind and company, or download as CSV.
Other Radiation Oncology in Illinois
Related records
Radiation Oncology in Illinois
Practitioners in the same specialty and state, ranked by reported value.
All Radiation Oncology
Everyone recorded under this specialty, nationwide.
Doctors in Illinois
Every practitioner in the state with a reported payment.
How to read this page
What each amount means, and what it does not mean.
What this means
U.S. law requires drug and medical device manufacturers to report payments and transfers of value they make to physicians and teaching hospitals. The Centers for Medicare & Medicaid Services publishes that record each year. This page shows what was reported about this person, and nothing else.
An ownership interest is different from the other two. It is not a payment: it is a stake — shares, options, a partnership holding — that a physician or an immediate family member held in a manufacturer during that year. The figure shown is what the stake was reported to be worth.
Research payments frequently pass through a clinician to the institution running a trial, and rarely represent personal income. They should be read differently from general payments.