Who Paid My Doc
Christos Mantzoros
Endocrinology, Diabetes & Metabolism Boston, MA Medical Doctor
NPI 1275512808 CMS profile 103140
330 Brookline Ave, St 816, Boston, MA 02215
General payments
$242,959
Research payments
$0
Ownership & investment interest
$0
Research they led as principal investigator
$739,678
Through program year 2025, Christos Mantzoros of Boston, MA is reported in the CMS Open Payments database as having received $242,959 across 183 general payments and $0 in research payments paid to them. Separately, studies naming them as principal investigator received $739,678 in research payments, paid to institutions rather than to them.
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 96th percentile of Endocrinology, Diabetes & Metabolism profiles with reported payments. Percentile describes the distribution, not the conduct.
By program year
7 rows| Year | Kind | Relative to this record's peak year | Amount | Records |
|---|---|---|---|---|
| 2025 | General | $123,837 | 92 | |
| 2024 | General | $34,583 | 49 | |
| 2023 | General | $2,465 | 7 | |
| 2022 | General | $6,939 | 9 | |
| 2021 | General | $14,079 | 4 | |
| 2020 | General | $58,274 | 14 | |
| 2019 | General | $2,782 | 8 |
Beside peers
- Christos Mantzoros
- Endocrinology, Diabetes & Metabolism median
- Middle half of Endocrinology, Diabetes & Metabolism
- National median
In program year 2025, general payments to Christos Mantzoros were reported at $123,837. Among 5,868 Endocrinology, Diabetes & Metabolism profiles paid that year, the median was $507 and the middle half received between $135 and $1,838.
Show as a table
| Year | Christos Mantzoros | Endocrinology, Diabetes & Metabolism median | Middle half | National median |
|---|---|---|---|---|
| 2019 | $2,782 | $494 | $123–$2,253 | $163 |
| 2020 | $58,274 | $335 | $85–$1,841 | $114 |
| 2021 | $14,079 | $398 | $88–$1,981 | $132 |
| 2022 | $6,939 | $364 | $88–$1,568 | $149 |
| 2023 | $2,465 | $420 | $113–$1,614 | $160 |
| 2024 | $34,583 | $440 | $121–$1,646 | $164 |
| 2025 | $123,837 | $507 | $135–$1,838 | $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
183 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.
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Related records
Endocrinology, Diabetes & Metabolism in Massachusetts
Practitioners in the same specialty and state, ranked by reported value.
All Endocrinology, Diabetes & Metabolism
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.