Who Paid My Doc
Darren Brennan
Diagnostic Radiology Marlborough, MA Medical Doctor
NPI 1710904172 CMS profile 122454
157 Union St, Marlborough, MA 01752
General payments
$478,465
Research payments
$164,759
Ownership & investment interest
$212,310
Research they led as principal investigator
$1,304,487
Through program year 2025, Darren Brennan of Marlborough, MA is reported in the CMS Open Payments database as having received $478,465 across 244 general payments and $164,759 in research payments paid to them. Separately, studies naming them as principal investigator received $1,304,487 in research payments, paid to institutions rather than to them. They also declared ownership or investment interests valued at $212,310 across 8 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 99th percentile of Diagnostic Radiology profiles with reported payments. Percentile describes the distribution, not the conduct.
By program year
14 rows| Year | Kind | Relative to this record's peak year | Amount | Records |
|---|---|---|---|---|
| 2025 | Research | $461 | 1 | |
| 2023 | Research | $5,175 | 1 | |
| 2022 | General | $4,500 | 3 | |
| 2022 | Research | $24,870 | 5 | |
| 2021 | General | $118,900 | 87 | |
| 2021 | Research | $56,700 | 3 | |
| 2020 | General | $154,300 | 79 | |
| 2020 | Research | $43,703 | 4 | |
| 2019 | General | $200,765 | 75 | |
| 2019 | Research | $33,850 | 9 | |
| 2025 | Ownership | $53,078 | 2 | |
| 2024 | Ownership | $53,078 | 2 | |
| 2023 | Ownership | $53,078 | 2 | |
| 2022 | Ownership | $53,078 | 2 |
Beside peers
- Darren Brennan
- Diagnostic Radiology median
- Middle half of Diagnostic Radiology
- National median
In program year 2025, general payments to Darren Brennan were reported at $0. Among 8,325 Diagnostic Radiology profiles paid that year, the median was $112 and the middle half received between $32 and $349.
Show as a table
| Year | Darren Brennan | Diagnostic Radiology median | Middle half | National median |
|---|---|---|---|---|
| 2019 | $200,765 | $108 | $29–$318 | $163 |
| 2020 | $154,300 | $65 | $21–$252 | $114 |
| 2021 | $118,900 | $92 | $24–$292 | $132 |
| 2022 | $4,500 | $104 | $29–$294 | $149 |
| 2023 | $0 | $110 | $29–$337 | $160 |
| 2024 | $0 | $113 | $30–$356 | $164 |
| 2025 | $0 | $112 | $32–$349 | $169 |
Breakdown
A payment can name more than one product, so these amounts overlap and do not add up to the general-payment figure.
Records
267 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 Diagnostic Radiology in Massachusetts
Gregg Miller
Diagnostic Radiology · Boston, MA
Ali Guermazi
Diagnostic Radiology · West Roxbury, MA
Stephan Anderson
Diagnostic Radiology · Boston, MA
Ajay Wakhloo
Diagnostic Radiology · Worcester, MA
Ashraf Thabet
Diagnostic Radiology · Boston, MA
Mukesh Harisinghani
Diagnostic Radiology · Boston, MA
Related records
Diagnostic Radiology in Massachusetts
Practitioners in the same specialty and state, ranked by reported value.
All Diagnostic Radiology
Everyone recorded under this specialty, nationwide.
Doctors in Massachusetts
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.