Robert Chan, MD
Internal Medicine · Alhambra, CANPI 1508826488
Payments from drug & device makers
Across 379 payments — averaging $27.84 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pfizer$1K
- AstraZeneca$1K
- Amarin Pharma, Inc.$1K
- AbbVie$914
- Boehringer Ingelheim$802
- Novo Nordisk$799
- plus $5K from 28 others
What the payments were for
- Speaking & faculty fees$591%
- Travel & lodging$6826%
- Food & beverage$9,77093%
- Education$430%
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 |
|---|---|---|
| Pfizer | 47 | $1,138 |
| AstraZeneca | 40 | $1,106 |
| Amarin Pharma, Inc. | 23 | $1,043 |
| AbbVie(2 entities) | 33 | $914 |
| Boehringer Ingelheim | 31 | $802 |
| Novo Nordisk | 44 | $799 |
| Axonics, Inc. | 8 | $757 |
| Amgen | 20 | $754 |
| Merck | 25 | $519 |
| Lilly USA, LLC | 18 | $383 |
| Gilead | 22 | $329 |
| Ironwood Pharmaceuticals, Inc | 5 | $328 |
| Radius Health, Inc. | 8 | $279 |
| Johnson & Johnson | 8 | $243 |
| Exact Sciences | 3 | $221 |
| Bayer | 4 | $110 |
| Sanofi-aventis U.S. LLC | 6 | $109 |
| Novartis | 5 | $92 |
| Abbott | 4 | $84 |
| Astellas Pharma US Inc | 4 | $82 |
| Boston Scientific | 1 | $58 |
| Dexcom, Inc. | 2 | $54 |
| Kowa Pharmaceuticals America, Inc. | 2 | $48 |
| GSK | 2 | $42 |
| IBSA Pharma Inc. | 2 | $39 |
| Mannkind Corporation | 2 | $37 |
| Arbor Pharmaceuticals, Inc. | 2 | $31 |
| Ambu Inc. | 1 | $30 |
| Hologic Sales And Service, LLC | 1 | $24 |
| CMP Pharma, Inc. | 1 | $24 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $24 |
| Blue Earth Diagnostics | 1 | $20 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $17 |
| Scilex Pharmaceuticals Inc. | 1 | $11 |
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
$10,552 in reported general payments places this provider in the 90th 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 |
|---|---|---|
| FarxigaDapagliflozin Propanediol | 863 | $553,471 |
| RybelsusSemaglutide | 244 | $244,287 |
| VascepaIcosapent Ethyl | 645 | $196,797 |
| DapagliflozinDapagliflozin Propanediol | 329 | $173,150 |
| VemlidyTenofovir Alafenamide | 110 | $157,424 |
| JanuviaSitagliptin Phosphate | 228 | $151,182 |
| Diclofenac Sodium | 211 | $121,965 |
| Icosapent Ethyl | 656 | $114,802 |
| JardianceEmpagliflozin | 129 | $101,158 |
| CreonLipase/Protease/Amylase | 79 | $100,784 |
| OzempicSemaglutide | 99 | $97,336 |
| JanumetSitagliptin Phos/Metformin Hcl | 132 | $85,166 |
| EliquisApixaban | 106 | $65,824 |
| TradjentaLinagliptin | 76 | $56,251 |
| KerendiaFinerenone | 67 | $55,074 |
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 |
|---|---|---|
| AstraZenecaFarxiga, Breztri Aerosphere, Brilinta, Nexium | $1,106 | $609,767981 claims |
| Novo NordiskRybelsus, Ozempic, Xultophy 100-3.6 | $799 | $391,164382 claims |
| MerckJanuvia, Janumet, Janumet Xr | $519 | $258,250394 claims |
| Boehringer IngelheimJardiance, Tradjenta, Combivent Respimat | $802 | $189,819272 claims |
| GileadVemlidy | $329 | $157,424110 claims |
| AbbVieCreon, Restasis, Linzess | $914 | $145,029149 claims |
| PfizerEliquis | $1,138 | $65,824106 claims |
| BayerKerendia | $110 | $55,07467 claims |
| IBSA Pharma Inc.Licart | $39 | $21,22919 claims |
| Lilly USA, LLCTrulicity | $383 | $19,78519 claims |
| Astellas Pharma US IncMyrbetriq | $82 | $19,51046 claims |
| Arbor Pharmaceuticals, Inc.Edarbi | $31 | $15,50958 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 90th percentile of 13,581 internal medicine providers in California.
Other internal medicine in Alhambra
- Andrew ChengSouth San Francisco$55.1M
- Joel NeutelTustin$34.9M
- Donald BrandonSan Diego$34M
- William TownerLos Angeles$27.4M
- Rahul AggarwalSan Francisco$24M
- Masoud AzizadNorthridge$21.1M
- Helen StaceyWalnut Creek$20.4M
- Rohit Loombala Jolla$15.1M
- Zeid KayaliColton$14.2M
- Alexandra DrakakiSanta Monica$14.2M
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.