Thomas Tseng, DO
Internal Medicine · Monterey Park, CANPI 1912017211
Payments from drug & device makers
Across 564 payments — averaging $20.93 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$3K
- AbbVie$1K
- Astellas Pharma US Inc$962
- Amarin Pharma, Inc.$831
- Boehringer Ingelheim$629
- Nestle Healthcare Nutrition Inc.$578
- plus $4K from 35 others
What the payments were for
- Food & beverage$11,12594%
- Education$6796%
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 |
|---|---|---|
| Amgen | 167 | $2,894 |
| AbbVie(2 entities) | 89 | $1,487 |
| Astellas Pharma US Inc | 25 | $962 |
| Amarin Pharma, Inc. | 51 | $831 |
| Boehringer Ingelheim | 24 | $629 |
| Nestle Healthcare Nutrition Inc. | 26 | $578 |
| Gilead | 25 | $482 |
| AstraZeneca | 13 | $364 |
| Merck | 17 | $332 |
| Lilly USA, LLC | 13 | $307 |
| Novartis | 11 | $267 |
| CMP Pharma, Inc. | 1 | $237 |
| Aimmune Therapeutics, Inc. | 6 | $162 |
| Otsuka America Pharmaceutical, Inc. | 2 | $149 |
| Pfizer | 6 | $142 |
| Vivus LLC | 7 | $128 |
| Teva Pharmaceuticals USA, Inc. | 1 | $122 |
| Almatica Pharma LLC | 6 | $121 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 6 | $119 |
| Bayer | 5 | $119 |
| Novo Nordisk | 5 | $110 |
| Xeris Pharmaceuticals, Inc. | 5 | $103 |
| Biogen | 4 | $97 |
| Redhill Biopharma Inc. | 5 | $96 |
| Radius Health, Inc. | 4 | $95 |
| Shield Therapeutics Inc | 4 | $91 |
| GSK | 4 | $91 |
| Corium, LLC | 3 | $76 |
| Ironwood Pharmaceuticals, Inc | 4 | $76 |
| Sumitomo Pharma America, Inc. | 3 | $70 |
| Johnson & Johnson | 1 | $64 |
| Lundbeck LLC | 3 | $58 |
| Genentech USA, Inc. | 3 | $55 |
| Scilex Pharmaceuticals Inc. | 3 | $55 |
| Exact Sciences | 2 | $42 |
| Eisai Inc. | 2 | $41 |
| Arbor Pharmaceuticals, Inc. | 2 | $40 |
| E.r. Squibb & Sons, L.L.C. | 2 | $35 |
| Sunovion Pharmaceuticals Inc. | 2 | $34 |
| Sun Pharmaceutical Industries Inc. | 1 | $27 |
| Dexcom, Inc. | 1 | $18 |
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.
- Norliqva$237
- REXULTI$125
- AIRSUPRA$125
- Vascepa$125
- Austedo XR$122
How this compares
$11,804 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 |
|---|---|---|
| JardianceEmpagliflozin | 267 | $259,988 |
| JanuviaSitagliptin Phosphate | 221 | $182,583 |
| ProliaDenosumab | 99 | $166,606 |
| MyrbetriqMirabegron | 129 | $68,826 |
| VascepaIcosapent Ethyl | 218 | $58,797 |
| FarxigaDapagliflozin Propanediol | 56 | $49,537 |
| LinzessLinaclotide | 71 | $48,952 |
| ZenpepLipase/Protease/Amylase | 28 | $43,356 |
| CreonLipase/Protease/Amylase | 33 | $41,009 |
| VemlidyTenofovir Alafenamide | 30 | $40,293 |
| RestasisCyclosporine | 52 | $37,301 |
| JanumetSitagliptin Phos/Metformin Hcl | 41 | $36,587 |
| EliquisApixaban | 41 | $36,095 |
| Cyclosporine | 88 | $34,257 |
| OzempicSemaglutide | 21 | $18,692 |
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 |
|---|---|---|
| Boehringer IngelheimJardiance, Tradjenta | $629 | $274,226288 claims |
| MerckJanuvia, Janumet | $332 | $219,170262 claims |
| AmgenProlia | $2,894 | $166,60699 claims |
| AbbVieLinzess, Creon, Restasis, Namzaric | $1,487 | $139,386167 claims |
| Astellas Pharma US IncMyrbetriq | $962 | $68,826129 claims |
| AstraZenecaFarxiga, Crestor | $364 | $56,99070 claims |
| Aimmune Therapeutics, Inc.Zenpep | $162 | $43,35628 claims |
| GileadVemlidy | $482 | $40,29330 claims |
| PfizerEliquis | $142 | $36,09541 claims |
| Novo NordiskOzempic | $110 | $18,69221 claims |
| NovartisEntresto | $267 | $18,10718 claims |
| Johnson & JohnsonXarelto | $64 | $17,10027 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 Monterey Park
- 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.