Pei Chung, MD
Surgery · Maryville, ILNPI 1669609988
Payments from drug & device makers
What this record shows
The money is spread across several categories — education (57.3%), travel and lodging and food and beverage — rather than concentrated in one kind of arrangement. Intuitive Surgical accounts for 76.9% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2019 at $12,717 and has fallen 92.4% since, to $962 in 2025. 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 65 payments — averaging $417.39 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$21K
- Covidien LP$3K
- W. L. Gore & Associates, Inc.$2K
- Davol Inc.$820
- Kerecis Limited$280
- Innocoll Pharmaceuticals Limited$81
- plus $222 from 5 others
What the payments were for
- Consulting fees$2,4509%
- Travel & lodging$6,23623%
- Food & beverage$2,89711%
- Education$15,54757%
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 |
|---|---|---|
| Intuitive Surgical | 35 | $20,867 |
| Covidien LP | 2 | $3,013 |
| W. L. Gore & Associates, Inc. | 9 | $1,847 |
| Davol Inc. | 6 | $820 |
| Kerecis Limited | 1 | $280 |
| Innocoll Pharmaceuticals Limited | 6 | $81 |
| Medtronic | 1 | $73 |
| Baxter Healthcare | 1 | $56 |
| Hologic Sales And Service, LLC | 2 | $37 |
| Stryker | 1 | $32 |
| Mozarc Medical US LLC | 1 | $24 |
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.
- Da Vinci Surgical System$15,479
- DAVINCI XI$4,000
- GORE BIO-A Tissue Reinforcement$1,432
- Kerecis Omega3 Marigen$1,121
- Phasix Mesh$699
- DA VINCI SP$604
- Kerecis Omega3 SurgiClose$280
- GORE SYNECOR Biomaterial$241
How this compares
$27,131 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 | 53 | $326 |
| Ciprofloxacin Hcl | 13 | $40 |
Paid to pharmacies, not to this prescriber.
Other surgery in Maryville
- Jaishankar RamanBurr Ridge$1.6M
- Reza GamagamiNew Lenox$1.2M
- Francesco BiancoChicago$1M
- Mark KeldahlChicago$765K
- Barry RosenBarrington$443K
- Douglas JonesChampaign$425K
- Rami LutfiChicago$411K
- Paul VanaDowners Grove$368K
- Erik BorncampNew Lenox$364K
- Michael UjikiEvanston$276K
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.