Healthcare provider profile · identity verified

Jian A Chen, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine · SANTA PAULA, CA · NPI 1679568612

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 Jian A Chen, M.D. received $598.88 in general payments during 2025 across 19 reported records.

Enterra Medical, Inc. accounted for 30.8% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 15 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Mounjaro, Ozempic, Prolia, 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 13 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 18 claims for Synthroid by this doctor in 2024.

Amgen 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 ENBREL as an associated drug or biological on 9330 records involving 2094 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Enbrel by this doctor in 2024.

Amgen 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 PROLIA as an associated drug or biological on 20867 records involving 11744 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Prolia by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 70 claims for Jardiance by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 37 claims for Mounjaro by this doctor in 2024.

Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Trulicity 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 75 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 30 claims for Rybelsus by this doctor in 2024.

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

Payment overview · 2025

General Payments

$598.88

19 reported records · 8 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
Enterra Medical, Inc. Unresolved — no canonical attribution shown $184.4330.8%12025
Amgen Inc. Unresolved — no canonical attribution shown $141.5623.6%72025
Novo Nordisk Inc Unresolved — no canonical attribution shown $118.5619.8%52025
Lilly USA, LLC Unresolved — no canonical attribution shown $57.049.5%22025
Supernus Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $27.064.5%12025
ABBVIE INC. Unresolved — no canonical attribution shown $26.324.4%12025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $23.243.9%12025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $20.673.5%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$598.8819

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 $104.59 4 2025
Source payment records
EVENITY
Normalized: evenity
Biological Amgen Inc. $59.27 5 2025
Source payment records
PROLIA
Normalized: prolia
Biological Amgen Inc. $59.27 5 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $54.77 2 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $29.50 1 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $29.50 1 2025
Source payment records
Qelbree
Normalized: qelbree
Drug Supernus Pharmaceuticals, Inc. $27.06 1 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $26.32 1 2025
Source payment records
CAPVAXIVE
Normalized: capvaxive
Biological Merck Sharp & Dohme LLC $23.24 1 2025
Source payment records
GARDASIL 9
Normalized: gardasil 9
Biological Merck Sharp & Dohme LLC $23.24 1 2025
Source payment records
VAXNEUVANCE
Normalized: vaxneuvance
Biological Merck Sharp & Dohme LLC $23.24 1 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $20.67 1 2025
Source payment records
OTEZLA
Normalized: otezla
Drug Amgen Inc. $17.29 1 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $17.29 1 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $13.97 1 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
MOUNJARO
mounjaro
2025 Mounjaro 2024 37
Beneficiary count suppressed
exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 75 exact normalized Medicare Part D
PROLIA
prolia
2025 Prolia 2024 13
Beneficiary count suppressed
exact normalized Medicare Part D
Rybelsus
rybelsus
2025 Rybelsus 2024 30
Beneficiary count suppressed
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
13 suppressed by CMS
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
18 suppressed by CMS
Amgen Inc.
Exact reporting entity; no affiliate inference
2025 ENBREL
open payments reported associated product
CMS Open Payments — General Payments
9330 supporting records · 2094 recipient NPIs · example record 1226877474
Enbrel · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS
Amgen Inc.
Exact reporting entity; no affiliate inference
2025 PROLIA
open payments reported associated product
CMS Open Payments — General Payments
20867 supporting records · 11744 recipient NPIs · example record 1226874448
Prolia · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
47708 supporting records · 23833 recipient NPIs · example record 1186464557
Jardiance · 2024
Exact normalized brand match · 1 Part D row
70 19
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 MOUNJARO
open payments reported associated product
CMS Open Payments — General Payments
186719 supporting records · 66436 recipient NPIs · example record 1186464455
Mounjaro · 2024
Exact normalized brand match · 1 Part D row
37 suppressed by CMS
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 TRULICITY
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 57 recipient NPIs · example record 1186464601
Trulicity · 2024
Exact normalized brand match · 1 Part D row
15 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
75 11
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
30 suppressed by CMS

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 Calcium518140
Levothyroxine SodiumLevothyroxine Sodium453112
Amlodipine BesylateAmlodipine Besylate28482
Metformin HclMetformin Hcl18555
OmeprazoleOmeprazole16358
GabapentinGabapentin15748
Losartan PotassiumLosartan Potassium15647
FurosemideFurosemide14336
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen13918
Trazodone HclTrazodone Hcl13835
MeloxicamMeloxicam13733
Rosuvastatin CalciumRosuvastatin Calcium13140
Metoprolol SuccinateMetoprolol Succinate11432
LisinoprilLisinopril10633
SimvastatinSimvastatin10322
Sertraline HclSertraline Hcl10029
Pantoprazole SodiumPantoprazole Sodium9527
Albuterol Sulfate HfaAlbuterol Sulfate8835
AlprazolamAlprazolam8322
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril7817
Alendronate SodiumAlendronate Sodium7621
OzempicSemaglutide7511
JardianceEmpagliflozin7019
MirtazapineMirtazapine7017
AtenololAtenolol6916
LorazepamLorazepam6918
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide6517
Metoprolol TartrateMetoprolol Tartrate6517
AllopurinolAllopurinol6012
HydrochlorothiazideHydrochlorothiazide5816
Tamsulosin HclTamsulosin Hcl5813
EliquisApixaban5714
SpironolactoneSpironolactone5516
Escitalopram OxalateEscitalopram Oxalate5413
Zolpidem TartrateZolpidem Tartrate54suppressed
Amitriptyline HclAmitriptyline Hcl53suppressed
Metformin Hcl ErMetformin Hcl5315
Hydralazine HclHydralazine Hcl52suppressed
Montelukast SodiumMontelukast Sodium5113
Breo ElliptaFluticasone/Vilanterol4911
EstradiolEstradiol4616
Trelegy ElliptaFluticasone/Umeclidin/Vilanter46suppressed
AzithromycinAzithromycin4541
Hydroxyzine HclHydroxyzine Hcl43suppressed
ClonazepamClonazepam42suppressed
FenofibrateFenofibrate Nanocrystallized4013
CarvedilolCarvedilol39suppressed
Olmesartan MedoxomilOlmesartan Medoxomil39suppressed
GlimepirideGlimepiride37suppressed
MounjaroTirzepatide37suppressed
Oxybutynin Chloride ErOxybutynin Chloride3714
Amlodipine-ValsartanAmlodipine Besylate/Valsartan3511
Memantine HclMemantine Hcl35suppressed
CelecoxibCelecoxib34suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide33suppressed
Triamcinolone AcetonideTriamcinolone Acetonide3325
Fluticasone PropionateFluticasone Propionate3116
Quetiapine FumarateQuetiapine Fumarate31suppressed
ClopidogrelClopidogrel Bisulfate30suppressed
FarxigaDapagliflozin Propanediol30suppressed
Paroxetine HclParoxetine Hcl30suppressed
Pioglitazone HclPioglitazone Hcl30suppressed
RybelsusSemaglutide30suppressed
Tramadol HclTramadol Hcl30suppressed
ValacyclovirValacyclovir Hcl3011
Vitamin D2Ergocalciferol (Vitamin D2)3011
FinasterideFinasteride29suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl29suppressed
ValsartanValsartan29suppressed
FamotidineFamotidine2811
Venlafaxine Hcl ErVenlafaxine Hcl28suppressed
Potassium ChloridePotassium Chloride2711
Sumatriptan SuccinateSumatriptan Succinate27suppressed
Citalopram HbrCitalopram Hydrobromide26suppressed
Diclofenac SodiumDiclofenac Sodium26suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid26suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl25suppressed
Donepezil HclDonepezil Hcl25suppressed
Hydroxychloroquine SulfateHydroxychloroquine Sulfate25suppressed
Propranolol HclPropranolol Hcl25suppressed
IbuprofenIbuprofen24suppressed
Tramadol Hcl ErTramadol Hcl24suppressed
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip2312
Isosorbide Mononitrate ErIsosorbide Mononitrate23suppressed
PregabalinPregabalin23suppressed
Buspirone HclBuspirone Hcl22suppressed
DiazepamDiazepam21suppressed
LamotrigineLamotrigine21suppressed
TemazepamTemazepam21suppressed
Ipratropium BromideIpratropium Bromide19suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic19suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen19suppressed
PrednisonePrednisone19suppressed
Doxycycline HyclateDoxycycline Hyclate1817
Incruse ElliptaUmeclidinium Bromide18suppressed
Nifedipine ErNifedipine18suppressed
Nortriptyline HclNortriptyline Hcl18suppressed
SynthroidLevothyroxine Sodium18suppressed
Azelastine HclAzelastine Hcl17suppressed
Bupropion XlBupropion Hcl17suppressed
ProgesteroneProgesterone, Micronized17suppressed
Benazepril-HydrochlorothiazideBenazepril/Hydrochlorothiazide16suppressed
CephalexinCephalexin1615
Doxazosin MesylateDoxazosin Mesylate16suppressed
Duloxetine HclDuloxetine Hcl16suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst1611
Ondansetron HclOndansetron Hcl16suppressed
PaxlovidNirmatrelvir/Ritonavir1616
Terazosin HclTerazosin Hcl16suppressed
Tolterodine Tartrate ErTolterodine Tartrate16suppressed
AcyclovirAcyclovir15suppressed
AmoxicillinAmoxicillin1511
EzetimibeEzetimibe15suppressed
Fluoxetine HclFluoxetine Hcl15suppressed
Tresiba Flextouch U-200Insulin Degludec15suppressed
TrulicityDulaglutide15suppressed
Amlodipine-OlmesartanAmlodipine Bes/Olmesartan Med14suppressed
DigoxinDigoxin14suppressed
Silver SulfadiazineSilver Sulfadiazine14suppressed
Ciprofloxacin HclCiprofloxacin Hcl1312
EnbrelEtanercept13suppressed
EntrestoSacubitril/Valsartan13suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol13suppressed
LinzessLinaclotide13suppressed
ProliaDenosumab13suppressed
Tresiba Flextouch U-100Insulin Degludec13suppressed
Bupropion Hcl SrBupropion Hcl12suppressed
CarbamazepineCarbamazepine12suppressed
Diltiazem 24hr ErDiltiazem Hcl12suppressed
EszopicloneEszopiclone12suppressed
OxycontinOxycodone Hcl12suppressed
Phenytoin Sodium ExtendedPhenytoin Sodium Extended12suppressed
PrimidonePrimidone12suppressed
TopiramateTopiramate12suppressed
Benazepril HclBenazepril Hcl11suppressed
CilostazolCilostazol11suppressed
HydrocortisoneHydrocortisone11suppressed
Janumet XrSitagliptin Phos/Metformin Hcl11suppressed
Polymyxin B Sul-TrimethoprimPolymyxin B Sulf/Trimethoprim11suppressed
Propranolol Hcl ErPropranolol Hcl11suppressed
Spiriva HandihalerTiotropium Bromide11suppressed
SymbicortBudesonide/Formoterol Fumarate11suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide11suppressed

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 $598.88 · 19 records Enterra Medical, Inc. CAPVAXIVE, EVENITY, GARDASIL 9, Kerendia, MOUNJARO, OTEZLA, Ozempic, PROLIA, Qelbree, REPATHA, Rybelsus, VAXNEUVANCE, VRAYLAR, Wegovy, ZEPBOUND 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