Mark London, MD
Surgery · Chicago, ILNPI 1295032258
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $16,451 of the $24,300 with a category attached, or 67.7%. Merit Medical Systems Inc accounts for 81.3% of it on its own, with 16 other manufacturers making up the rest. 2025 is the largest year on record at $19,862, more than ten times the $882 reported in 2019. Among surgery clinicians in IL 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 75 payments — averaging $324.00 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merit Medical Systems Inc$20K
- Covidien LP$3K
- W. L. Gore & Associates, Inc.$892
- Lemaitre Vascular, Inc.$426
- Bard Peripheral Vascular, Inc.$200
- Getinge USA Sales, LLC$126
- plus $372 from 11 others
Across 15 payments — averaging $4889.22 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.
- Phraxis, Inc.$25K
- Medtronic$23K
- Merit Medical Systems Inc$17K
- Humacyte Global, Inc.$5K
- Sonavex, Inc.$3K
What the payments were for
- Consulting fees$16,45168%
- Speaking & faculty fees$1,6007%
- Travel & lodging$4,06717%
- Food & beverage$2,1829%
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 |
|---|---|---|
| Merit Medical Systems Inc | 12 | $19,753 |
| Covidien LP | 1 | $2,531 |
| W. L. Gore & Associates, Inc. | 24 | $892 |
| Lemaitre Vascular, Inc. | 9 | $426 |
| Bard Peripheral Vascular, Inc. | 5 | $200 |
| Getinge USA Sales, LLC | 5 | $126 |
| Boston Scientific | 4 | $104 |
| Inari Medical, Inc. | 1 | $73 |
| Venturemed Group, Inc. | 6 | $63 |
| Acacia Pharma Inc | 1 | $25 |
| Lundbeck LLC | 1 | $22 |
| BD | 1 | $20 |
| Misonix Inc | 1 | $16 |
| Stryker | 1 | $16 |
| Johnson & Johnson | 1 | $12 |
| Trevena, Inc. | 1 | $11 |
| Cardinal Health 200 LLC | 1 | $11 |
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.
How this compares
$24,300 in reported general payments places this provider in the 90th percentile of 1,180 surgery providers in Illinois.
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 |
|---|---|---|
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 325 | $2,137 |
| Naloxone Hcl | 21 | $1,216 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 34 | $221 |
Paid to pharmacies, not to this prescriber.
Other surgery in Chicago
- Francesco BiancoChicago$1M
- Mark KeldahlChicago$765K
- Rami LutfiChicago$411K
- Jonah StulbergChicago$209K
- Julie DunderdaleChicago$205K
- Shabirhusain AbadinChicago$153K
- Richard ZhuChicago$128K
- Eric HungnessChicago$126K
- Kyle MuellerChicago$117K
- Benjamin JohnsonChicago$115K
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.