Who Paid My Doc
Gearoid McMahon
Nephrology Boston, MA Medical Doctor
NPI 1992025274 CMS profile 1245348
75 Francis St, Mrb4, Boston, MA 02115
General payments
$4,310
Research payments
$1,330
Ownership & investment interest
$0
Research they led as principal investigator
$2,824
Through program year 2024, Gearoid McMahon of Boston, MA is reported in the CMS Open Payments database as having received $4,310 across 8 general payments and $1,330 in research payments paid to them. Separately, studies naming them as principal investigator received $2,824 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 82nd percentile of Nephrology profiles with reported payments. Percentile describes the distribution, not the conduct.
By program year
4 rows| Year | Kind | Relative to this record's peak year | Amount | Records |
|---|---|---|---|---|
| 2024 | General | $5 | 2 | |
| 2023 | General | $3,953 | 3 | |
| 2019 | General | $352 | 3 | |
| 2019 | Research | $1,330 | 10 |
Beside peers
- Gearoid McMahon
- Nephrology median
- Middle half of Nephrology
- National median
In program year 2025, general payments to Gearoid McMahon were reported at $0. Among 8,186 Nephrology profiles paid that year, the median was $310 and the middle half received between $104 and $880.
Show as a table
| Year | Gearoid McMahon | Nephrology median | Middle half | National median |
|---|---|---|---|---|
| 2019 | $352 | $236 | $90–$588 | $163 |
| 2020 | $0 | $135 | $46–$364 | $114 |
| 2021 | $0 | $202 | $67–$551 | $132 |
| 2022 | $0 | $242 | $77–$695 | $149 |
| 2023 | $3,953 | $254 | $84–$766 | $160 |
| 2024 | $5 | $300 | $99–$852 | $164 |
| 2025 | $0 | $310 | $104–$880 | $169 |
Breakdown
Prescribing to Medicare patients
Part D · data year 2024 · 8 drugsPart D claims
149
Drug cost
$67,822
Branded share of claims
39.6%
| Drug | Type | Relative to their largest | Claims | Drug cost |
|---|---|---|---|---|
| Jardiance Empagliflozin | Brand | 33 | $51,244 | |
| Farxiga Dapagliflozin Propanediol | Brand | 15 | $15,006 | |
| Potassium Citrate Er Potassium Citrate | Brand | 11 | $741 | |
| Calcitriol | Generic | 31 | $424 | |
| Lisinopril | Generic | 18 | $154 | |
| Hydrochlorothiazide | Generic | 17 | $115 | |
| Amlodipine Besylate | Generic | 13 | $101 | |
| Allopurinol | Generic | 11 | $37 |
Drug cost is what was paid for the drugs at the pharmacy — by Medicare, the patient and others — and is not money to the prescriber. Medicare Part D only: drugs dispensed to Medicare beneficiaries. A drug with fewer than 11 claims for this prescriber is not published, so a missing drug does not mean zero. The medians are for the 9,003 Part D prescribers listed as Nephrology; they describe a distribution and say nothing about conduct.
Billing to Medicare
Part B · data year 2024 · 16 billing codesPaid by Medicare
$114,413
Medicare patients
356
Services billed
1,397
| Condition among their Medicare patients | Relative to the most common | Share of patients |
|---|---|---|
| High blood pressure | 75% | |
| Chronic kidney disease | 75% | |
| Heart failure | 58% | |
| Diabetes | 56% | |
| Ischemic heart disease | 52% | |
| Arthritis | 48% | |
| Atrial fibrillation | 47% | |
| Depression | 35% |
Medicare Part B only: services billed to Medicare. Rows covering fewer than 11 beneficiaries are not published. Only drugs given in the clinic are itemised here; the rest of what this provider billed is in the total above.
Records
18 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 Nephrology in Massachusetts
Related records
Nephrology in Massachusetts
Practitioners in the same specialty and state, ranked by reported value.
All Nephrology
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.