Lin Chen, MD
Infectious Disease · Cambridge, MANPI 1285636654
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $50,830 of the $69,377 with a category attached, or 73.3%. 10 manufacturers reported payments, led by Valneva USA, Inc. at 38.2% of the total. 2024 is the largest year on record at $20,741, 7.7 times the $2,692 reported in 2019. Among infectious disease 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 69 payments — averaging $1005.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Valneva USA, Inc.$27K
- Valneva Austria GmbH$18K
- Merck$11K
- Takeda Pharmaceuticals U.S.A., Inc.$5K
- Bavarian Nordic A/s$4K
- Sanofi Pasteur Inc.$3K
- plus $1K from 4 others
Across 5 payments — averaging $37,789 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.
- Sanofi Pasteur Inc.$189K
What the payments were for
- Consulting fees$50,83073%
- Speaking & faculty fees$12,27118%
- Travel & lodging$2,0453%
- Food & beverage$1,2232%
- Education$5071%
- Charitable contribution$2,5004%
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 |
|---|---|---|
| Valneva USA, Inc. | 27 | $26,501 |
| Valneva Austria GmbH | 17 | $18,200 |
| Merck | 14 | $10,965 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $5,100 |
| Bavarian Nordic A/s | 3 | $4,035 |
| Sanofi Pasteur Inc. | 2 | $3,322 |
| Emergent Biosolutions Inc. | 1 | $1,088 |
| Sirtex Medical Inc | 1 | $118 |
| Arbor Pharmaceuticals, Inc. | 2 | $28 |
| La Jolla Pharmaceutical Company | 1 | $19 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- Encepur$3,528
- IXIARO$2,664
- IXCHIQ$1,400
- SIR-Spheres Microspheres$118
How this compares
$69,377 in reported general payments places this provider in the 95th percentile of 368 infectious disease providers in Massachusetts.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Atovaquone-Proguanil HclAtovaquone/Proguanil Hcl | 135 | $9,610 |
| PaxlovidNirmatrelvir/Ritonavir | 48 | $2,859 |
| Azithromycin | 174 | $686 |
| Acetazolamide | 15 | $264 |
Paid to pharmacies, not to this prescriber.
Other infectious disease in Cambridge
- Bruce WalkerCambridge$52K
- Stephen ZinnerCambridge$32K
- Yoav GolanBoston$1.1M
- Claudia MartorellSpringfield$990K
- Nesli BasgozBoston$901K
- Todd EllerinBoston$843K
- Peter SebenyNewburyport$343K
- Paul SaxBoston$320K
- Davidson HamerBoston$221K
- Camille KottonBoston$195K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.