Healthcare provider profile · identity verified

Fen Jiang, MD

Allopathic & Osteopathic Physicians|Internal Medicine|Medical Oncology · MISSION VIEJO, CA · NPI 1831312289

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 Fen Jiang, MD received $3,197.12 in general payments during 2025 across 120 reported records.

Merck Sharp & Dohme LLC accounted for 9.0% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 73 associated products.

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 CREON as an associated drug or biological on 91561 records involving 20616 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Creon by this doctor in 2024.

Celgene Corporation reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ELIQUIS as an associated drug or biological on 25 records involving 24 distinct recipient NPIs. Public Medicare Part D data also shows 37 claims for Eliquis by this doctor in 2024.

E.R. Squibb & Sons, L.L.C. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ELIQUIS as an associated drug or biological on 27956 records involving 14870 distinct recipient NPIs. Public Medicare Part D data also shows 37 claims for Eliquis by this doctor in 2024.

Janssen Biotech, 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 XARELTO as an associated drug or biological on 24 records involving 23 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Xarelto by this doctor in 2024.

PFIZER 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 ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 37 claims for Eliquis by this doctor in 2024.

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

Payment overview · 2025

General Payments

$3,197.12

120 reported records · 46 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
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $286.759.0%102025
Daiichi Sankyo Inc. Unresolved — no canonical attribution shown $256.608.0%52025
ABBVIE INC. Unresolved — no canonical attribution shown $211.516.6%82025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $196.676.2%82025
Karyopharm Therapeutics Inc. Unresolved — no canonical attribution shown $167.565.2%52025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $140.034.4%72025
Genentech USA, Inc. Unresolved — no canonical attribution shown $115.413.6%42025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $110.133.4%42025
Janssen Biotech, Inc. Unresolved — no canonical attribution shown $109.353.4%42025
PFIZER INC. Unresolved — no canonical attribution shown $99.593.1%42025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $97.373.0%32025
PUMA BIOTECHNOLOGY, INC. Unresolved — no canonical attribution shown $92.032.9%42025
Coherus Oncology, Inc. Unresolved — no canonical attribution shown $81.952.6%32025
BeOne Medicines USA, Inc. Unresolved — no canonical attribution shown $75.082.4%32025
Takeda Pharmaceuticals U.S.A., Inc. Unresolved — no canonical attribution shown $71.562.2%32025
Regeneron Healthcare Solutions, Inc. Unresolved — no canonical attribution shown $68.602.1%22025
Incyte Corporation Unresolved — no canonical attribution shown $65.382.0%32025
Exelixis Inc. Unresolved — no canonical attribution shown $55.621.7%22025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $51.561.6%22025
Rigel Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $49.521.6%22025
Iovance Biotherapeutics, Inc. Unresolved — no canonical attribution shown $46.631.5%22025
RECORDATI_RARE_DISEASES_INC. Unresolved — no canonical attribution shown $46.351.4%22025
Eisai Inc. Unresolved — no canonical attribution shown $43.481.4%22025
Aveo Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $42.411.3%12025
SOBI, INC Unresolved — no canonical attribution shown $41.671.3%22025
TAIHO ONCOLOGY, INC. Unresolved — no canonical attribution shown $40.301.3%22025
Celgene Corporation Unresolved — no canonical attribution shown $37.901.2%22025
Ipsen Biopharmaceuticals, Inc Unresolved — no canonical attribution shown $36.141.1%22025
Amgen Inc. Unresolved — no canonical attribution shown $32.721.0%12025
PharmaEssentia USA Corporation Unresolved — no canonical attribution shown $31.851.0%12025
ARRAY BIOPHARMA INC Unresolved — no canonical attribution shown $31.141.0%22025
SUN PHARMACEUTICAL INDUSTRIES INC. Unresolved — no canonical attribution shown $31.051.0%12025
GENZYME CORPORATION Unresolved — no canonical attribution shown $30.010.9%12025
Genmab U.S., Inc. Unresolved — no canonical attribution shown $29.790.9%12025
Alnylam Pharmaceuticals Inc. Unresolved — no canonical attribution shown $29.700.9%12025
Blueprint Medicines Corporation Unresolved — no canonical attribution shown $29.320.9%12025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $27.980.9%12025
ADC THERAPEUTICS AMERICA, INC. Unresolved — no canonical attribution shown $26.800.8%12025
Gilead Sciences, Inc. Unresolved — no canonical attribution shown $25.720.8%12025
Legend Biotech USA Inc. Unresolved — no canonical attribution shown $24.930.8%12025
EMD Serono, Inc. Unresolved — no canonical attribution shown $22.440.7%12025
Fennec Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $20.240.6%12025
Apellis Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $20.080.6%12025
Azurity Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $16.310.5%12025
Syndax Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $16.180.5%12025
Chiesi USA, Inc. Unresolved — no canonical attribution shown $13.710.4%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$3,164.40119
Education$32.721

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
KEYTRUDA
Normalized: keytruda
Biological Merck Sharp & Dohme LLC $286.75 10 2025
Source payment records
XPOVIO
Normalized: xpovio
Drug Karyopharm Therapeutics Inc. $167.56 5 2025
Source payment records
DATROWAY
Normalized: datroway
Drug Daiichi Sankyo Inc. $149.86 1 2025
Source payment records
ENHERTU
Normalized: enhertu
Biological, Drug AstraZeneca Pharmaceuticals LP, Daiichi Sankyo Inc. $127.13 5 2025
Source payment records
ELAHERE
Normalized: elahere
Drug ABBVIE INC. $100.44 3 2025
Source payment records
CALQUENCE
Normalized: calquence
Drug AstraZeneca Pharmaceuticals LP $98.80 4 2025
Source payment records
NERLYNX
Normalized: nerlynx
Drug PUMA BIOTECHNOLOGY, INC. $92.03 4 2025
Source payment records
EPKINLY
Normalized: epkinly
Drug ABBVIE INC., Genmab U.S., Inc. $87.56 4 2025
Source payment records
LOQTORZI
Normalized: loqtorzi
Biological Coherus Oncology, Inc. $81.95 3 2025
Source payment records
XTANDI
Normalized: xtandi
Drug Astellas Pharma US Inc, PFIZER INC. $81.57 3 2025
Source payment records
OJJAARA
Normalized: ojjaara
Drug GlaxoSmithKline, LLC. $70.50 3 2025
Source payment records
JEMPERLI
Normalized: jemperli
Biological GlaxoSmithKline, LLC. $69.53 4 2025
Source payment records
LIBTAYO
Normalized: libtayo
Biological Regeneron Healthcare Solutions, Inc. $68.60 2 2025
Source payment records
Vyloy
Normalized: vyloy
Drug Astellas Pharma US Inc $65.79 2 2025
Source payment records
DARZALEX
Normalized: darzalex
Biological Janssen Biotech, Inc. $64.02 2 2025
Source payment records
TECVAYLI
Normalized: tecvayli
Biological Janssen Biotech, Inc. $64.02 2 2025
Source payment records
Itovebi
Normalized: itovebi
Biological Genentech USA, Inc. $60.75 2 2025
Source payment records
IMBRUVICA
Normalized: imbruvica
Drug ABBVIE INC. $60.70 3 2025
Source payment records
AYVAKIT
Normalized: ayvakit
Biological, Drug Blueprint Medicines Corporation, GENZYME CORPORATION $59.33 2 2025
Source payment records
BRUKINSA
Normalized: brukinsa
Drug BeOne Medicines USA, Inc. $57.84 2 2025
Source payment records
CABOMETYX
Normalized: cabometyx
Drug Exelixis Inc. $55.62 2 2025
Source payment records
WELIREG
Normalized: welireg
Drug Merck Sharp & Dohme LLC $54.76 2 2025
Source payment records
Polivy
Normalized: polivy
Biological Genentech USA, Inc. $54.66 2 2025
Source payment records
FRUZAQLA
Normalized: fruzaqla
Drug Takeda Pharmaceuticals U.S.A., Inc. $54.01 2 2025
Source payment records
OPDUALAG
Normalized: opdualag
Drug Celgene Corporation, E.R. Squibb & Sons, L.L.C. $52.52 2 2025
Source payment records
Fabhalta
Normalized: fabhalta
Drug Novartis Pharmaceuticals Corporation $51.90 2 2025
Source payment records
ORGOVYX
Normalized: orgovyx
Drug PFIZER INC. $49.99 2 2025
Source payment records
TALZENNA
Normalized: talzenna
Drug PFIZER INC. $49.99 2 2025
Source payment records
TIVDAK
Normalized: tivdak
Biological PFIZER INC. $49.60 2 2025
Source payment records
Gavreto
Normalized: gavreto
Drug Rigel Pharmaceuticals, Inc. $49.52 2 2025
Source payment records
Rezlidhia
Normalized: rezlidhia
Drug Rigel Pharmaceuticals, Inc. $49.52 2 2025
Source payment records
TAVALISSE
Normalized: tavalisse
Drug Rigel Pharmaceuticals, Inc. $49.52 2 2025
Source payment records
Amtagvi
Normalized: amtagvi
Drug Iovance Biotherapeutics, Inc. $46.63 2 2025
Source payment records
LYNPARZA
Normalized: lynparza
Biological, Drug AstraZeneca Pharmaceuticals LP, Merck Sharp & Dohme LLC $44.91 2 2025
Source payment records
Lenvima
Normalized: lenvima
Drug Eisai Inc. $43.48 2 2025
Source payment records
FOTIVDA
Normalized: fotivda
Drug Aveo Pharmaceuticals, Inc. $42.41 1 2025
Source payment records
INQOVI
Normalized: inqovi
Drug TAIHO ONCOLOGY, INC. $40.30 2 2025
Source payment records
LONSURF
Normalized: lonsurf
Drug TAIHO ONCOLOGY, INC. $40.30 2 2025
Source payment records
MONJUVI
Normalized: monjuvi
Drug Incyte Corporation $40.09 2 2025
Source payment records
OPDIVO
Normalized: opdivo
Biological Celgene Corporation, E.R. Squibb & Sons, L.L.C. $36.94 2 2025
Source payment records
Onivyde
Normalized: onivyde
Drug Ipsen Biopharmaceuticals, Inc $36.14 2 2025
Source payment records
Somatuline Depot
Normalized: somatuline depot
Drug Ipsen Biopharmaceuticals, Inc $36.14 2 2025
Source payment records
IMFINZI
Normalized: imfinzi
Biological AstraZeneca Pharmaceuticals LP $32.34 1 2025
Source payment records
BESREMI
Normalized: besremi
Drug PharmaEssentia USA Corporation $31.85 1 2025
Source payment records
BRAFTOVI
Normalized: braftovi
Drug ARRAY BIOPHARMA INC $31.14 2 2025
Source payment records
MEKTOVI
Normalized: mektovi
Drug ARRAY BIOPHARMA INC $31.14 2 2025
Source payment records
TUKYSA
Normalized: tukysa
Drug ARRAY BIOPHARMA INC $31.14 2 2025
Source payment records
Odomzo
Normalized: odomzo
Drug SUN PHARMACEUTICAL INDUSTRIES INC. $31.05 1 2025
Source payment records
YONSA
Normalized: yonsa
Drug SUN PHARMACEUTICAL INDUSTRIES INC. $31.05 1 2025
Source payment records
VENCLEXTA
Normalized: venclexta
Drug ABBVIE INC. $30.27 1 2025
Source payment records
GIVLAARI
Normalized: givlaari
Drug Alnylam Pharmaceuticals Inc. $29.70 1 2025
Source payment records
LUTATHERA
Normalized: lutathera
Drug Novartis Pharmaceuticals Corporation $29.58 1 2025
Source payment records
SCEMBLIX
Normalized: scemblix
Drug Novartis Pharmaceuticals Corporation $28.65 1 2025
Source payment records
ZYNLONTA
Normalized: zynlonta
Drug ADC THERAPEUTICS AMERICA, INC. $26.80 1 2025
Source payment records
Vanflyta
Normalized: vanflyta
Drug Daiichi Sankyo Inc. $26.45 1 2025
Source payment records
Udenyca
Normalized: udenyca
Biological Coherus Oncology, Inc. $25.97 1 2025
Source payment records
Trodelvy
Normalized: trodelvy
Drug Gilead Sciences, Inc. $25.72 1 2025
Source payment records
JAKAFI
Normalized: jakafi
Drug Incyte Corporation $25.29 1 2025
Source payment records
Doptelet
Normalized: doptelet
Drug SOBI, INC $25.01 1 2025
Source payment records
CARVYKTI
Normalized: carvykti
Biological Legend Biotech USA Inc. $24.93 1 2025
Source payment records
RYBREVANT
Normalized: rybrevant
Drug Janssen Biotech, Inc. $24.10 1 2025
Source payment records
ENJAYMO
Normalized: enjaymo
Drug RECORDATI_RARE_DISEASES_INC. $23.42 1 2025
Source payment records
ZYNYZ
Normalized: zynyz
Drug Incyte Corporation $23.07 1 2025
Source payment records
SYLVANT
Normalized: sylvant
Drug RECORDATI_RARE_DISEASES_INC. $22.93 1 2025
Source payment records
BALVERSA
Normalized: balversa
Drug Janssen Biotech, Inc. $21.23 1 2025
Source payment records
ERLEADA
Normalized: erleada
Drug Janssen Biotech, Inc. $21.23 1 2025
Source payment records
Fyarro
Normalized: fyarro
Drug Fennec Pharmaceuticals, Inc. $20.24 1 2025
Source payment records
Empaveli
Normalized: empaveli
Drug Apellis Pharmaceuticals, Inc. $20.08 1 2025
Source payment records
ICLUSIG
Normalized: iclusig
Drug Takeda Pharmaceuticals U.S.A., Inc. $17.55 1 2025
Source payment records
TEVIMBRA
Normalized: tevimbra
Drug BeOne Medicines USA, Inc. $17.24 1 2025
Source payment records
Vonjo
Normalized: vonjo
Drug SOBI, INC $16.66 1 2025
Source payment records
DANZITEN
Normalized: danziten
Drug Azurity Pharmaceuticals, Inc. $16.31 1 2025
Source payment records
FERRIPROX
Normalized: ferriprox
Drug Chiesi USA, Inc. $13.71 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

No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.

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 CREON
open payments reported associated product
CMS Open Payments — General Payments
91561 supporting records · 20616 recipient NPIs · example record 1201352608
Creon · 2024
Exact normalized brand match · 1 Part D row
18 suppressed by CMS
Celgene Corporation
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
25 supporting records · 24 recipient NPIs · example record 1184385048
Eliquis · 2024
Exact normalized brand match · 1 Part D row
37 13
E.R. Squibb & Sons, L.L.C.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
27956 supporting records · 14870 recipient NPIs · example record 1184377713
Eliquis · 2024
Exact normalized brand match · 1 Part D row
37 13
Janssen Biotech, Inc.
Exact reporting entity; no affiliate inference
2025 XARELTO
open payments reported associated product
CMS Open Payments — General Payments
24 supporting records · 23 recipient NPIs · example record 1174259978
Xarelto · 2024
Exact normalized brand match · 1 Part D row
14 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
87112 supporting records · 36032 recipient NPIs · example record 1228794063
Eliquis · 2024
Exact normalized brand match · 1 Part D row
37 13

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
AnastrozoleAnastrozole16164
DexamethasoneDexamethasone5621
Ondansetron HclOndansetron Hcl4525
Pantoprazole SodiumPantoprazole Sodium4315
Prochlorperazine MaleateProchlorperazine Maleate4231
Tamoxifen CitrateTamoxifen Citrate4014
EliquisApixaban3713
LetrozoleLetrozole3512
Lidocaine-PrilocaineLidocaine/Prilocaine2619
Venlafaxine Hcl ErVenlafaxine Hcl23suppressed
PrednisonePrednisone21suppressed
Hydroxyzine HclHydroxyzine Hcl19suppressed
Clobetasol PropionateClobetasol Propionate18suppressed
CreonLipase/Protease/Amylase18suppressed
Abiraterone AcetateAbiraterone Acetate16suppressed
LorazepamLorazepam15suppressed
Ondansetron OdtOndansetron15suppressed
XareltoRivaroxaban14suppressed
LisinoprilLisinopril13suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim13suppressed
Duloxetine HclDuloxetine Hcl12suppressed
Oxycodone HclOxycodone Hcl12suppressed
Potassium ChloridePotassium Chloride12suppressed
ExemestaneExemestane11suppressed
Imatinib MesylateImatinib Mesylate11suppressed

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 $3,197.12 · 120 records Merck Sharp & Dohme LLC AYVAKIT, Amtagvi, BALVERSA, BESREMI, BRAFTOVI, BRUKINSA, CABOMETYX, CALQUENCE, CARVYKTI, DANZITEN, DARZALEX, DATROWAY, Doptelet, ELAHERE, ENHERTU, ENJAYMO, EPKINLY, ERLEADA, Empaveli, FERRIPROX, FOTIVDA, FRUZAQLA, Fabhalta, Fyarro, GIVLAARI, Gavreto, ICLUSIG, IMBRUVICA, IMFINZI, INQOVI, Itovebi, JAKAFI, JEMPERLI, KEYTRUDA, LIBTAYO, LONSURF, LOQTORZI, LUTATHERA, LYNPARZA, Lenvima, MEKTOVI, MONJUVI, NERLYNX, OJJAARA, OPDIVO, OPDUALAG, ORGOVYX, Odomzo, Onivyde, Polivy, RYBREVANT, Rezlidhia, SCEMBLIX, SYLVANT, Somatuline Depot, TALZENNA, TAVALISSE, TECVAYLI, TEVIMBRA, TIVDAK, TUKYSA, Trodelvy, Udenyca, VENCLEXTA, Vanflyta, Vonjo, Vyloy, WELIREG, XPOVIO, XTANDI, YONSA, ZYNLONTA, ZYNYZ 5
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