Zekun Feng, MD
Internal Medicine · San Francisco, CANPI 1184965873
Payments from drug & device makers
What this record shows
This record is dominated by grants: $27,500 of the $37,729 with a category attached, or 72.9%. 18 manufacturers reported payments, led by Abbott at 44.9% of the total. 2025 is the largest year on record at $18,961, more than ten times the $532 reported in 2021. Among internal medicine 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 167 payments — averaging $225.92 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$17K
- Medtronic$10K
- Boston Scientific$9K
- Biotronik Inc.$568
- Biosense Webster, Inc.$459
- Johnson & Johnson$339
- plus $1K from 12 others
What the payments were for
- Grants$27,50073%
- Travel & lodging$3,2939%
- Food & beverage$5,48215%
- Education$1,4214%
- Entertainment$330%
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 |
|---|---|---|
| Abbott | 105 | $16,923 |
| Medtronic | 8 | $9,511 |
| Boston Scientific | 2 | $8,750 |
| Biotronik Inc. | 9 | $568 |
| Biosense Webster, Inc. | 5 | $459 |
| Johnson & Johnson | 3 | $339 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 7 | $333 |
| Actelion Pharmaceuticals US, Inc. | 3 | $194 |
| Kestra Medical Technology Services, Inc. | 1 | $123 |
| Boehringer Ingelheim | 4 | $93 |
| Amgen | 1 | $78 |
| Chiesi USA, Inc. | 4 | $76 |
| AstraZeneca | 4 | $69 |
| Pfizer | 3 | $62 |
| Astellas Pharma US Inc | 2 | $46 |
| Irhythm Technologies, Inc. | 2 | $45 |
| Stereotaxis Inc | 3 | $33 |
| Cardiva Medical, Inc. | 1 | $25 |
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.
- EMBLEM MRI S-ICD$5,000
- ENSITE PRECISION$3,141
- TACTICATH$2,500
- ASSURITY$2,000
- ENSITE$955
- MitraClip$500
- THORATEC HEARTMATE 3 LVAS IMPLANT KIT$398
- Carto 3$367
- AVEIR$366
- BioMonitor$331
- XARELTO$314
- SelectSecure$171
- UPTRAVI$150
- OPSUMIT$150
- Assure WCD$123
- AMVIA EDGE$109
- LifeVest$105
How this compares
$37,729 in reported general payments places this provider in the 95th percentile of 13,581 internal medicine 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 |
|---|---|---|
| Cephalexin | 14 | $36 |
Paid to pharmacies, not to this prescriber.
Other internal medicine in San Francisco
- Fred CohenSan Francisco$929K
- John TeerlinkSan Francisco$819K
- Mark SmithSan Francisco$535K
- Lisa CapaldiniSan Francisco$434K
- Maria Dall'eraSan Francisco$417K
- Kenneth ColleySan Francisco$397K
- Louis CubbaSan Francisco$351K
- Daniel ButlerSan Francisco$347K
- Laurence CorashSan Francisco$336K
- Felicia StermanSan Francisco$298K
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.