Healthcare provider profile · identity verified

William Wei Ming Chen, MD

Allopathic & Osteopathic Physicians|Internal Medicine · SAN PABLO, CA · NPI 1851498372

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show William Wei Ming Chen, MD received $948.76 in general payments during 2025 across 49 reported records.

Novo Nordisk Inc accounted for 24.0% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 13 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Farxiga, Gemtesa, Linzess, Ozempic, Rybelsus.

ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 108 claims for Linzess by this doctor in 2024.

ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Synthroid by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported BEVESPI AEROSPHERE as an associated drug or biological on 763 records involving 473 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Bevespi Aerosphere by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 51 claims for Farxiga by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYMBICORT as an associated drug or biological on 71 records involving 51 distinct recipient NPIs. Public Medicare Part D data also shows 31 claims for Symbicort by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TEZSPIRE as an associated drug or biological on 33983 records involving 10291 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Tezspire by this doctor in 2024.

Novo Nordisk Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 59 claims for Ozempic by this doctor in 2024.

Novo Nordisk Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Rybelsus as an associated drug or biological on 161257 records involving 55409 distinct recipient NPIs. Public Medicare Part D data also shows 89 claims for Rybelsus by this doctor in 2024.

Sumitomo Pharma America, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported GEMTESA as an associated drug or biological on 61692 records involving 22152 distinct recipient NPIs. Public Medicare Part D data also shows 51 claims for Gemtesa by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$948.76

49 reported records · 6 companies

Separate record types

Research & Ownership

Research Payments (direct recipient): not present in the loaded data

Associated Research Funding (for example, named PI): not present in the loaded data

Ownership / Investment: not present in the loaded data

These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
Novo Nordisk Inc Unresolved — no canonical attribution shown $227.5024.0%142025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $216.7122.8%62025
Madrigal Pharmaceuticals Unresolved — no canonical attribution shown $177.1318.7%32025
Sumitomo Pharma America, Inc. Unresolved — no canonical attribution shown $172.2418.1%222025
ABBVIE INC. Unresolved — no canonical attribution shown $139.2914.7%32025
Ardelyx, Inc. Unresolved — no canonical attribution shown $15.891.7%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$909.2048
Education$39.561

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $181.93 8 2025
Source payment records
REZDIFFRA
Normalized: rezdiffra
Drug Madrigal Pharmaceuticals $177.13 3 2025
Source payment records
GEMTESA
Normalized: gemtesa
Drug Sumitomo Pharma America, Inc. $172.24 22 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $125.00 1 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $125.00 1 2025
Source payment records
FASENRA
Normalized: fasenra
Biological AstraZeneca Pharmaceuticals LP $117.37 4 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $99.34 2 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $85.34 1 2025
Source payment records
FARXIGA
Normalized: farxiga
Drug AstraZeneca Pharmaceuticals LP $85.34 1 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $53.89 6 2025
Source payment records
IBSRELA
Normalized: ibsrela
Drug Ardelyx, Inc. $15.89 1 2025
Source payment records
CREON
Normalized: creon
Drug ABBVIE INC. $14.29 2 2025
Source payment records
LINZESS
Normalized: linzess
Drug ABBVIE INC. $14.29 2 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

Open Payments productPayment yearPart D brandPart D yearClaimsMatch methodSource
FARXIGA
farxiga
2025 Farxiga 2024 51 exact normalized Medicare Part D
GEMTESA
gemtesa
2025 Gemtesa 2024 51 exact normalized Medicare Part D
LINZESS
linzess
2025 Linzess 2024 108 exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 59 exact normalized Medicare Part D
Rybelsus
rybelsus
2025 Rybelsus 2024 89 exact normalized Medicare Part D

The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.

Analysis 2 · Same-company prescribing overlap

Drugs reported in other payments from the same company that also appear in Medicare Part D

This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 LINZESS
open payments reported associated product
CMS Open Payments — General Payments
87954 supporting records · 21815 recipient NPIs · example record 1201352608
Linzess · 2024
Exact normalized brand match · 1 Part D row
108 30
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 SYNTHROID
open payments reported associated product
CMS Open Payments — General Payments
10655 supporting records · 4881 recipient NPIs · example record 1201352636
Synthroid · 2024
Exact normalized brand match · 1 Part D row
17 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 BEVESPI AEROSPHERE
open payments reported associated product
CMS Open Payments — General Payments
763 supporting records · 473 recipient NPIs · example record 1206131384
Bevespi Aerosphere · 2024
Exact normalized brand match · 1 Part D row
21 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 FARXIGA
open payments reported associated product
CMS Open Payments — General Payments
106133 supporting records · 42906 recipient NPIs · example record 1206131362
Farxiga · 2024
Exact normalized brand match · 1 Part D row
51 14
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 SYMBICORT
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 51 recipient NPIs · example record 1206132610
Symbicort · 2024
Exact normalized brand match · 1 Part D row
31 13
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 TEZSPIRE
open payments reported associated product
CMS Open Payments — General Payments
33983 supporting records · 10291 recipient NPIs · example record 1206131392
Tezspire · 2024
Exact normalized brand match · 1 Part D row
14 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
59 17
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Rybelsus
open payments reported associated product
CMS Open Payments — General Payments
161257 supporting records · 55409 recipient NPIs · example record 1188130076
Rybelsus · 2024
Exact normalized brand match · 1 Part D row
89 23
Sumitomo Pharma America, Inc.
Exact reporting entity; no affiliate inference
2025 GEMTESA
open payments reported associated product
CMS Open Payments — General Payments
61692 supporting records · 22152 recipient NPIs · example record 1176593503
Gemtesa · 2024
Exact normalized brand match · 1 Part D row
51 28

These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.

Public Medicare Part D data

Provider-and-drug rows loaded for 2024

BrandGenericClaimsBeneficiaries
Atorvastatin CalciumAtorvastatin Calcium946286
Amlodipine BesylateAmlodipine Besylate761204
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen730103
Metformin HclMetformin Hcl551169
Metoprolol SuccinateMetoprolol Succinate417124
Losartan PotassiumLosartan Potassium404109
Pantoprazole SodiumPantoprazole Sodium399134
LisinoprilLisinopril374109
Diclofenac SodiumDiclofenac Sodium351137
Levothyroxine SodiumLevothyroxine Sodium32177
SimvastatinSimvastatin29774
Triamcinolone AcetonideTriamcinolone Acetonide281118
Albuterol Sulfate HfaAlbuterol Sulfate27786
Tamsulosin HclTamsulosin Hcl25381
FurosemideFurosemide25065
GabapentinGabapentin24577
HydrochlorothiazideHydrochlorothiazide20260
DiazepamDiazepam19729
OmeprazoleOmeprazole18248
Fluticasone PropionateFluticasone Propionate18165
Trazodone HclTrazodone Hcl18143
EliquisApixaban16942
Nifedipine ErNifedipine15638
IbuprofenIbuprofen14760
Acetaminophen-CodeineAcetaminophen With Codeine14652
JardianceEmpagliflozin14152
AllopurinolAllopurinol13545
AtenololAtenolol12938
Escitalopram OxalateEscitalopram Oxalate12847
Trelegy ElliptaFluticasone/Umeclidin/Vilanter12633
LorazepamLorazepam12538
Ondansetron HclOndansetron Hcl12338
Rosuvastatin CalciumRosuvastatin Calcium12045
GlipizideGlipizide11735
Ropinirole HclRopinirole Hcl11732
Metoprolol TartrateMetoprolol Tartrate11640
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav11189
LinzessLinaclotide10830
Meclizine HclMeclizine Hcl10760
FinasterideFinasteride10431
Olmesartan MedoxomilOlmesartan Medoxomil10433
JanuviaSitagliptin Phosphate10227
Potassium ChloridePotassium Chloride10122
NaproxenNaproxen10031
LactuloseLactulose9123
Pioglitazone HclPioglitazone Hcl9121
Alendronate SodiumAlendronate Sodium9022
RybelsusSemaglutide8923
PregabalinPregabalin8825
MyrbetriqMirabegron8719
AmoxicillinAmoxicillin8669
BaclofenBaclofen8518
Zolpidem TartrateZolpidem Tartrate8219
TrulicityDulaglutide8111
Lantus SolostarInsulin Glargine,hum.Rec.Anlog7924
Donepezil HclDonepezil Hcl7521
Sumatriptan SuccinateSumatriptan Succinate7516
Duloxetine HclDuloxetine Hcl7324
FamotidineFamotidine7225
Hydroxyzine HclHydroxyzine Hcl7121
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide7119
Breztri AerosphereBudesonide/Glycopyr/Formoterol7023
CarvedilolCarvedilol6921
ClopidogrelClopidogrel Bisulfate6619
MeloxicamMeloxicam6320
Quetiapine FumarateQuetiapine Fumarate6217
XareltoRivaroxaban6115
ClonazepamClonazepam6012
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen6011
Pravastatin SodiumPravastatin Sodium6017
Ciprofloxacin HclCiprofloxacin Hcl5949
OzempicSemaglutide5917
TemazepamTemazepam5815
GlimepirideGlimepiride5718
Metformin Hcl ErMetformin Hcl5619
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr54suppressed
PrednisonePrednisone5433
Dicyclomine HclDicyclomine Hcl5214
Nano 2nd Gen Pen NeedlePen Needle, Diabetic5221
FarxigaDapagliflozin Propanediol5114
GemtesaVibegron5128
Hydralazine HclHydralazine Hcl5019
CelecoxibCelecoxib4922
Promethazine HclPromethazine Hcl4911
Sertraline HclSertraline Hcl4811
LevofloxacinLevofloxacin4638
Cromolyn SodiumCromolyn Sodium4517
VascepaIcosapent Ethyl45suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog43suppressed
EzetimibeEzetimibe4313
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide4311
LovastatinLovastatin4213
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide4111
ClotrimazoleClotrimazole3928
Divalproex SodiumDivalproex Sodium39suppressed
LevetiracetamLevetiracetam3913
Ventolin HfaAlbuterol Sulfate3915
Doxepin HclDoxepin Hcl38suppressed
Oxycodone HclOxycodone Hcl38suppressed
BelsomraSuvorexant37suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine3717
ColchicineColchicine3614
PaxlovidNirmatrelvir/Ritonavir3636
Clonidine HclClonidine Hcl35suppressed
MirtazapineMirtazapine35suppressed
Benazepril HclBenazepril Hcl34suppressed
Nebivolol HclNebivolol Hcl34suppressed
Oxybutynin ChlorideOxybutynin Chloride33suppressed
TradjentaLinagliptin33suppressed
ValsartanValsartan33suppressed
HydrocortisoneHydrocortisone3223
SpironolactoneSpironolactone3211
AlprazolamAlprazolam3112
SymbicortBudesonide/Formoterol Fumarate3113
Montelukast SodiumMontelukast Sodium30suppressed
SsdSilver Sulfadiazine2920
Buspirone HclBuspirone Hcl28suppressed
CephalexinCephalexin2823
Diltiazem HclDiltiazem Hcl28suppressed
Memantine HclMemantine Hcl28suppressed
Combivent RespimatIpratropium/Albuterol Sulfate26suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl2612
TelmisartanTelmisartan26suppressed
Tramadol HclTramadol Hcl26suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril25suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate25suppressed
Megestrol AcetateMegestrol Acetate2514
FenofibrateFenofibrate24suppressed
Fiasp FlextouchInsulin Aspart (Niacinamide)24suppressed
FluocinonideFluocinonide2412
NystatinNystatin23suppressed
SulindacSulindac23suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid23suppressed
Amitriptyline HclAmitriptyline Hcl22suppressed
Bevespi AerosphereGlycopyrrolate/Formoterol Fum21suppressed
CarbamazepineCarbamazepine21suppressed
Humalog Kwikpen U-100Insulin Lispro21suppressed
LatanoprostLatanoprost21suppressed
Morphine Sulfate ErMorphine Sulfate21suppressed
PrimidonePrimidone21suppressed
BreynaBudesonide/Formoterol Fumarate20suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate2011
Chlorhexidine GluconateChlorhexidine Gluconate20suppressed
CilostazolCilostazol20suppressed
LacosamideLacosamide20suppressed
LoperamideLoperamide Hcl2015
Paroxetine HclParoxetine Hcl20suppressed
Betamethasone DipropionateBetamethasone Dipropionate1915
Diclofenac PotassiumDiclofenac Potassium19suppressed
DutasterideDutasteride19suppressed
IbuIbuprofen19suppressed
RoflumilastRoflumilast19suppressed
SucralfateSucralfate19suppressed
Terbinafine HclTerbinafine Hcl19suppressed
Amiodarone HclAmiodarone Hcl18suppressed
Azelastine HclAzelastine Hcl18suppressed
CarisoprodolCarisoprodol18suppressed
Doxazosin MesylateDoxazosin Mesylate18suppressed
Doxycycline HyclateDoxycycline Hyclate1813
Insulin SyringeSyringe And Needle,insulin,1ml18suppressed
LantusInsulin Glargine,hum.Rec.Anlog18suppressed
LidocaineLidocaine18suppressed
Breo ElliptaFluticasone/Vilanterol17suppressed
NitroglycerinNitroglycerin1712
Novolog FlexpenInsulin Aspart17suppressed
SynthroidLevothyroxine Sodium17suppressed
DigoxinDigoxin16suppressed
Enalapril MaleateEnalapril Maleate16suppressed
FluconazoleFluconazole1611
Fluoxetine HclFluoxetine Hcl16suppressed
MetronidazoleMetronidazole16suppressed
MupirocinMupirocin16suppressed
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic16suppressed
Verapamil HclVerapamil Hcl16suppressed
Glipizide-MetforminGlipizide/Metformin Hcl15suppressed
Labetalol HclLabetalol Hcl15suppressed
ValacyclovirValacyclovir Hcl15suppressed
Wixela InhubFluticasone Propion/Salmeterol15suppressed
AripiprazoleAripiprazole14suppressed
CyclosporineCyclosporine14suppressed
LubiprostoneLubiprostone14suppressed
TezspireTezepelumab-Ekko14suppressed
Tresiba Flextouch U-100Insulin Degludec14suppressed
Tresiba Flextouch U-200Insulin Degludec14suppressed
Bisoprolol FumarateBisoprolol Fumarate13suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl13suppressed
MounjaroTirzepatide13suppressed
Phenytoin Sodium ExtendedPhenytoin Sodium Extended13suppressed
Procto-Med HcHydrocortisone13suppressed
Tizanidine HclTizanidine Hcl13suppressed
Warfarin SodiumWarfarin Sodium13suppressed
Carbamazepine ErCarbamazepine12suppressed
ChlorthalidoneChlorthalidone12suppressed
DescovyEmtricitabine/Tenofov Alafenam12suppressed
FentanylFentanyl12suppressed
Glipizide ErGlipizide12suppressed
Lurasidone HclLurasidone Hcl12suppressed
Mometasone FuroateMometasone Furoate12suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog12suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic12suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide12suppressed
Advair DiskusFluticasone Propion/Salmeterol11suppressed
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide11suppressed
HumalogInsulin Lispro11suppressed
Methadone HclMethadone Hcl11suppressed
Oxybutynin Chloride ErOxybutynin Chloride11suppressed
Polymyxin B Sul-TrimethoprimPolymyxin B Sulf/Trimethoprim11suppressed
Propranolol HclPropranolol Hcl11suppressed
RisperidoneRisperidone11suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim11suppressed
Terazosin HclTerazosin Hcl11suppressed
TivicayDolutegravir Sodium11suppressed

Timeline

Payment and prescribing data by year

Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025 $948.76 · 49 records Novo Nordisk Inc AIRSUPRA, BREZTRI, CREON, FARXIGA, FASENRA, GEMTESA, IBSRELA, LINZESS, Ozempic, QULIPTA, REZDIFFRA, Rybelsus, UBRELVY 9
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
CMS Open Payments — General Payments 2025 2026-06-30 Original source
Medicare Part D Prescribers by Provider and Drug 2024 2026-05-06 Original source
NPPES Data Dissemination V2 current / reference data 2026-08-10 Original source

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error