Serena Liu, MD
Family Medicine · Palo Alto, CANPI 1811457302
Payments from drug & device makers
What this record shows
Stryker accounts for 70.1% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2023 at $1,170 and has fallen 72.3% since, to $324 in 2025.
Across 19 payments — averaging $87.86 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$1K
- GSK$119
- VB Spine LLC$112
- Phathom Pharmaceuticals, Inc.$91
- Tolmar, Inc.$90
- Alphatec Spine, Inc$87
What the payments were for
- Travel & lodging$97959%
- Food & beverage$69041%
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 |
|---|---|---|
| Stryker | 5 | $1,170 |
| GSK | 5 | $119 |
| VB Spine LLC | 1 | $112 |
| Phathom Pharmaceuticals, Inc. | 3 | $91 |
| Tolmar, Inc. | 4 | $90 |
| Alphatec Spine, Inc | 1 | $87 |
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
$1,669 in reported general payments places this provider in the 80th percentile of 10,533 family 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 |
|---|---|---|
| Atorvastatin Calcium | 113 | $1,449 |
| Gabapentin | 48 | $597 |
| Bupropion XlBupropion Hcl | 12 | $512 |
| ValacyclovirValacyclovir Hcl | 17 | $502 |
| Rosuvastatin Calcium | 22 | $464 |
| Lisinopril | 53 | $463 |
| Losartan Potassium | 47 | $448 |
| Amlodipine Besylate | 64 | $427 |
| Levothyroxine Sodium | 36 | $404 |
| Simvastatin | 34 | $332 |
| Hydrochlorothiazide | 31 | $326 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 16 | $325 |
| Famotidine | 15 | $307 |
| Omeprazole | 16 | $306 |
| Fluticasone Propionate | 11 | $265 |
Paid to pharmacies, not to this prescriber.
Other family medicine in Palo Alto
- Sherly SoleimanEncino$1.2M
- Pamela KushnerLos Angeles$1.2M
- Sujata NarayanStanford$1.2M
- Jeffrey UngerChino$906K
- Alexander RivkinLos Angeles$866K
- Scott HowellLos Angeles$793K
- Derrick ButlerLos Angeles$692K
- Sandra CalmanMontara$589K
- Anthony JonesOakland$377K
- Amira AyadBakersfield$360K
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.