James Zimmerman, MD
Vascular Surgery · Redwood City, CANPI 1093729121
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $50,950 of the $74,365 with a category attached, or 68.5%. 14 manufacturers reported payments, led by W. L. Gore & Associates, Inc. at 57.3% of the total. Reporting peaked in 2019 at $46,558 and has fallen 96.0% since, to $1,853 in 2025. Among vascular surgery clinicians in CA 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 168 payments — averaging $442.65 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- W. L. Gore & Associates, Inc.$43K
- Medtronic$14K
- Philips North America LLC$9K
- Penumbra, Inc.$5K
- Provisio Medical, Inc.$2K
- Silk Road Medical, Inc.$1K
- plus $1K from 8 others
What the payments were for
- Consulting fees$2,7504%
- Speaking & faculty fees$50,95069%
- Travel & lodging$8,18711%
- Food & beverage$12,47917%
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 |
|---|---|---|
| W. L. Gore & Associates, Inc. | 45 | $42,597 |
| Medtronic(2 entities) | 63 | $13,699 |
| Philips North America LLC | 18 | $8,765 |
| Penumbra, Inc. | 24 | $5,007 |
| Provisio Medical, Inc. | 1 | $2,000 |
| Silk Road Medical, Inc. | 7 | $1,216 |
| Mercator Medsystems, Inc. | 1 | $318 |
| Shockwave Medical, Inc | 1 | $214 |
| Lemaitre Vascular, Inc. | 3 | $203 |
| Bard Peripheral Vascular, Inc. | 1 | $139 |
| Abbott | 1 | $138 |
| Johnson & Johnson | 1 | $43 |
| Hologic Sales And Service, LLC | 1 | $19 |
| Reflow Medical Inc | 1 | $9 |
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.
- VIABAHN Endoprosthesis$38,386
- IN.PACT AV$8,105
- IGT D Peripheral$7,600
- Indigo System$4,557
- VIABAHN Endoprosthesis with Heparin Bioactive Surface$1,913
- ENROUTE Transcarotid Neuroprotection System$1,103
- ENROUTE Transcarotid Stent System$1,103
- ENHANCE Transcarotid Peripheral Access Kit$1,103
- ENROUTE 0.014 Guidewire$1,103
- ELLIPSYS VASCULAR ACCESS SYSTEM$1,088
- Endurant$825
- IN.PACT Admiral$806
- ENDURANT IIS$686
- Abre$505
- ACUSEAL Vascular Graft$424
- Bullfrog$318
- EXCLUDER Conformable AAA Endoprosthesis with Active Control$283
- Penumbra System$282
- VIABAHN VBX Balloon Expandable Endoprosthesis$240
- Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter$214
How this compares
$74,365 in reported general payments places this provider in the 95th percentile of 519 vascular surgery providers in California.
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 |
|---|---|---|
| ClopidogrelClopidogrel Bisulfate | 58 | $1,378 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 114 | $793 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 17 | $38 |
Paid to pharmacies, not to this prescriber.
Other vascular surgery in Redwood City
- Son DuongFountain Valley$503K
- Venita ChandraPalo Alto$488K
- Sukgu HanLos Angeles$477K
- Leigh Ann ObanionFresno$469K
- Trevor DerderianRancho Mirage$359K
- Karthikeshwar KasirajanPalo Alto$349K
- Johnathon RolloLos Angeles$337K
- Melissa LojaFairfield$272K
- Jason LeePalo Alto$228K
- John LaneSan Diego$212K
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.