David Friedman
Nephrology · Boston, MANPI 1194763482
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $19,750,000 of the $19,786,647 with a category attached, or 99.8%. Vertex accounts for 100.0% of it on its own, with 2 other manufacturers making up the rest. Reporting peaked in 2021 at $18,755,428 and has fallen 100.0% since, to $3,704 in 2025. Among nephrology clinicians in MA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 35 payments — averaging $565,333 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Vertex$19.8M
- Sanofi$7K
- Genentech USA, Inc.$61
Across 6 payments — averaging $778,897 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Vertex$4.7M
What the payments were for
- Royalty or licence$19,750,000100%
- Consulting fees$35,6790%
- Travel & lodging$6060%
- Food & beverage$3620%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Vertex | 29 | $19,779,451 |
| Sanofi | 5 | $7,134 |
| Genentech USA, Inc. | 1 | $61 |
How this compares
$19,786,647 in reported general payments places this provider in the 95th percentile of 339 nephrology providers in Massachusetts.
Other nephrology in Boston
- Martin PollakBoston$19.8M
- Dennis AusielloBoston$4.6M
- Ajay SinghBoston$916K
- Leslie FangBoston$388K
- Jean FrancisBoston$244K
- Joseph BonventreBoston$175K
- Andrew AllegrettiBoston$139K
- Ravi ThadhaniBoston$115K
- Meghan SiseBoston$113K
- Ronald PerroneBoston$110K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.