Andrew Ko, MD
Medical Oncology · San Francisco, CANPI 1851355853
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $22,724 of the $36,639 with a category attached, or 62.0%. 19 manufacturers reported payments, led by Partner Therapeutics, Inc. at 24.3% of the total. 2025 is the largest year on record at $21,744, more than ten times the $816 reported in 2019.
Across 56 payments — averaging $654.27 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Partner Therapeutics, Inc.$9K
- Jazz Pharmaceuticals Inc.$5K
- Corcept Therapeutics$4K
- Aadi Bioscience, Inc.$3K
- Genentech, Inc.$3K
- Gilead$3K
- plus $11K from 13 others
Across 55 payments — averaging $23,413 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.
- E.r. Squibb & Sons, L.L.C.$454K
- Roche Products Limited$418K
- Novartis$162K
- Merck$102K
- Verastem, Inc.$87K
- Genentech, Inc.$45K
- plus $20K from 4 others
What the payments were for
- Consulting fees$22,72462%
- Speaking & faculty fees$7,44220%
- Travel & lodging$4,23912%
- Food & beverage$2,1906%
- Education$440%
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 |
|---|---|---|
| Partner Therapeutics, Inc. | 23 | $8,915 |
| Jazz Pharmaceuticals Inc. | 1 | $4,944 |
| Corcept Therapeutics | 4 | $3,865 |
| Aadi Bioscience, Inc. | 8 | $2,878 |
| Genentech, Inc. | 1 | $2,850 |
| Gilead | 2 | $2,552 |
| Ipsen Biopharmaceuticals, Inc | 1 | $2,450 |
| Eisai Inc. | 1 | $2,355 |
| Pfizer | 2 | $1,532 |
| Legend Biotech USA Inc. | 1 | $1,460 |
| Novartis | 3 | $951 |
| F. Hoffmann-la Roche AG | 1 | $656 |
| Exelixis Inc. | 1 | $500 |
| Astellas Pharma US Inc | 2 | $258 |
| Brainlab, Inc. | 1 | $127 |
| AstraZeneca | 1 | $112 |
| Stemline Therapeutics Inc. | 1 | $101 |
| Novocure GmbH | 1 | $100 |
| Mallinckrodt Enterprises LLC | 1 | $33 |
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
$36,639 in reported general payments places this provider in the 75th percentile of 379 medical oncology 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 |
|---|---|---|
| CreonLipase/Protease/Amylase | 26 | $68,716 |
| ZenpepLipase/Protease/Amylase | 12 | $57,271 |
| Imatinib Mesylate | 15 | $14,590 |
| EliquisApixaban | 13 | $7,294 |
| Prochlorperazine Maleate | 65 | $795 |
| Minocycline Hcl | 14 | $764 |
| Ondansetron Hcl | 55 | $588 |
| Lidocaine-PrilocaineLidocaine/Prilocaine | 15 | $159 |
| Lorazepam | 32 | $150 |
| Potassium Chloride | 13 | $116 |
| LoperamideLoperamide Hcl | 19 | $99 |
| Diazepam | 11 | $40 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| PfizerEliquis | $1,532 | $7,29413 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 75th percentile of 379 medical oncology providers in California.
Other medical oncology in San Francisco
- Stephen SherwinSan Francisco$6.9M
- John ParkSan Francisco$558K
- Kevin KimSan Francisco$176K
- Aman ChauhanSan Francisco$99K
- Ana Velazquez MananaSan Francisco$90K
- Noam DrazinBeverly Hills$1.4M
- Farshid DayyaniOrange$1.2M
- April TeitelbaumSan Diego$1.1M
- Przemyslaw TwardowskiSanta Monica$995K
- Ann LowePalo Alto$923K
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.