Sophia Koo, MD
Infectious Disease · Boston, MANPI 1174581771
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $21,125 of the $31,192 with a category attached, or 67.7%. Reporting peaked in 2019 at $16,867 and has fallen 83.0% since, to $2,875 in 2025. Among infectious disease clinicians in MA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 16 payments — averaging $1949.49 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$18K
- Vertex$13K
Across 59 payments — averaging $82,609 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.
- GSK$4.1M
- Astrazeneca UK Limited$521K
- Merck$208K
- Pfizer$46K
What the payments were for
- Consulting fees$21,12568%
- Travel & lodging$9,98332%
- Food & beverage$840%
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.
How this compares
$31,192 in reported general payments places this provider in the 90th 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.
Other infectious disease in Boston
- Yoav GolanBoston$1.1M
- Nesli BasgozBoston$901K
- Todd EllerinBoston$843K
- Paul SaxBoston$320K
- Davidson HamerBoston$221K
- Camille KottonBoston$195K
- David SnydmanBoston$141K
- Eric RosenbergBoston$134K
- Deborah HungBoston$130K
- Laura KogelmanBoston$54K
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.