May Chien, MD
Pediatric Hematology-Oncology · Palo Alto, CANPI 1417221326
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $261 of the $423 with a category attached, or 61.7%. 4 manufacturers reported payments, led by Sobi, Inc at 38.3% of the total. 2024 is the largest year on record at $287, 2.5 times the $113 reported in 2022. That places this record below the midpoint for pediatric hematology-oncology clinicians in CA, where the typical reported total is $536.
Across 5 payments — averaging $84.52 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sobi, Inc$162
- Agios Pharmaceuticals, Inc.$125
- Sanofi$113
- Genentech, Inc.$22
Across 104 payments — averaging $4696.94 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.
- Agios Pharmaceuticals, Inc.$423K
- Global Blood Therapeutics, Inc.$45K
- Pfizer$21K
What the payments were for
- Food & beverage$26162%
- Education$16238%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Sobi, Inc | 2 | $162 |
| Agios Pharmaceuticals, Inc. | 1 | $125 |
| Sanofi | 1 | $113 |
| Genentech, Inc. | 1 | $22 |
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.
- PYRUKYND$125
How this compares
$423 in reported general payments places this provider in the 45th percentile of 307 pediatric hematology-oncology providers in California.
See all pediatric hematology-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 |
|---|---|---|
| EliquisApixaban | 11 | $6,984 |
Paid to pharmacies, not to this prescriber.
Other pediatric hematology-oncology in Palo Alto
- Philip PizzoPalo Alto$2.6M
- Elysia AlvarezPalo Alto$200K
- Christopher DvorakPalo Alto$144K
- Jessie AlexanderPalo Alto$70K
- John CurnuttePalo Alto$50K
- Crystal MackallPalo Alto$44K
- Glaivy BatsuliPalo Alto$40K
- Michael LinkPalo Alto$37K
- Tami JohnPalo Alto$32K
- Orly KleinPalo Alto$31K
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.