Healthcare provider profile · identity verified

Hiroshi Yamagata, MD

Allopathic & Osteopathic Physicians|Internal Medicine|Hematology & Oncology · CERRITOS, CA · NPI 1871948950

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 Hiroshi Yamagata, MD received $4,341.25 in general payments during 2025 across 146 reported records.

Novartis Pharmaceuticals Corporation accounted for 29.1% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 66 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Keytruda, Kisqali, Lonsurf, Xtandi.

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 LUPRON DEPOT as an associated drug or biological on 6475 records involving 3205 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Lupron Depot by this doctor in 2024.

ARRAY BIOPHARMA 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 XTANDI as an associated drug or biological on 98 records involving 88 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Xtandi by this doctor in 2024.

Astellas Pharma US 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 Xtandi as an associated drug or biological on 11345 records involving 5418 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Xtandi by this doctor in 2024.

Merck Sharp & Dohme 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 KEYTRUDA as an associated drug or biological on 46588 records involving 15767 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Keytruda by this doctor in 2024.

Novartis Pharmaceuticals 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 KISQALI as an associated drug or biological on 31637 records involving 7959 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Kisqali 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 XTANDI as an associated drug or biological on 19368 records involving 7657 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Xtandi by this doctor in 2024.

TAIHO ONCOLOGY, 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 LONSURF as an associated drug or biological on 4796 records involving 2963 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Lonsurf by this doctor in 2024.

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

Payment overview · 2025

General Payments

$4,341.25

146 reported records · 43 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
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $1,261.6529.1%242025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $337.167.8%82025
BeOne Medicines USA, Inc. Unresolved — no canonical attribution shown $234.515.4%82025
Janssen Biotech, Inc. Unresolved — no canonical attribution shown $210.044.8%82025
PFIZER INC. Unresolved — no canonical attribution shown $208.694.8%102025
Celgene Corporation Unresolved — no canonical attribution shown $168.163.9%112025
SEAGEN INC. Unresolved — no canonical attribution shown $148.993.4%22025
ARRAY BIOPHARMA INC Unresolved — no canonical attribution shown $140.233.2%62025
Daiichi Sankyo Inc. Unresolved — no canonical attribution shown $122.512.8%52025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $100.532.3%52025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $93.722.2%42025
BeiGene USA, Inc. Unresolved — no canonical attribution shown $91.402.1%32025
Incyte Corporation Unresolved — no canonical attribution shown $79.591.8%42025
Eisai Inc. Unresolved — no canonical attribution shown $75.991.8%32025
Karyopharm Therapeutics Inc. Unresolved — no canonical attribution shown $68.211.6%32025
PharmaEssentia USA Corporation Unresolved — no canonical attribution shown $67.861.6%22025
TAIHO ONCOLOGY, INC. Unresolved — no canonical attribution shown $61.561.4%32025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $54.451.2%32025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $53.151.2%22025
Sumitomo Pharma America, Inc. Unresolved — no canonical attribution shown $52.471.2%32025
PUMA BIOTECHNOLOGY, INC. Unresolved — no canonical attribution shown $50.501.2%22025
Regeneron Healthcare Solutions, Inc. Unresolved — no canonical attribution shown $49.091.1%22025
Aveo Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $47.961.1%22025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $44.241.0%22025
SUN PHARMACEUTICAL INDUSTRIES INC. Unresolved — no canonical attribution shown $42.001.0%12025
Lilly USA, LLC Unresolved — no canonical attribution shown $38.200.9%22025
Azurity Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $35.610.8%22025
ABBVIE INC. Unresolved — no canonical attribution shown $34.170.8%12025
Ipsen Biopharmaceuticals, Inc Unresolved — no canonical attribution shown $32.060.7%12025
Dendreon Pharmaceuticals LLC Unresolved — no canonical attribution shown $32.050.7%12025
Verity Pharmaceuticals Inc. Unresolved — no canonical attribution shown $30.920.7%12025
Syndax Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $28.500.7%12025
Alnylam Pharmaceuticals Inc. Unresolved — no canonical attribution shown $27.790.6%12025
Rigel Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $27.740.6%12025
SOBI, INC Unresolved — no canonical attribution shown $24.410.6%12025
SERVIER PHARMACEUTICALS LLC Unresolved — no canonical attribution shown $23.870.6%12025
Apellis Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $22.220.5%12025
Geron Corporation Unresolved — no canonical attribution shown $22.110.5%12025
Takeda Pharmaceuticals U.S.A., Inc. Unresolved — no canonical attribution shown $21.600.5%12025
Exact Sciences Corporation Unresolved — no canonical attribution shown $21.120.5%12025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $19.830.5%12025
Blueprint Medicines Corporation Unresolved — no canonical attribution shown $18.370.4%12025
Exelixis Inc. Unresolved — no canonical attribution shown $16.020.4%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$2,964.55129
Long term medical supply or device loan$1,081.8112
Education$294.895

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
KISQALI
Normalized: kisqali
Drug Novartis Pharmaceuticals Corporation $1,207.38 20 2025
Source payment records
BRUKINSA
Normalized: brukinsa
Drug BeOne Medicines USA, Inc., BeiGene USA, Inc. $325.91 11 2025
Source payment records
ERLEADA
Normalized: erleada
Drug Janssen Biotech, Inc. $167.25 6 2025
Source payment records
TUKYSA
Normalized: tukysa
Drug ARRAY BIOPHARMA INC, PFIZER INC. $135.37 6 2025
Source payment records
BRAFTOVI
Normalized: braftovi
Drug ARRAY BIOPHARMA INC $120.61 5 2025
Source payment records
MEKTOVI
Normalized: mektovi
Drug ARRAY BIOPHARMA INC $120.61 5 2025
Source payment records
REBLOZYL
Normalized: reblozyl
Biological Celgene Corporation $107.10 9 2025
Source payment records
ELREXFIO
Normalized: elrexfio
Drug PFIZER INC. $102.55 5 2025
Source payment records
ADCETRIS
Normalized: adcetris
Biological PFIZER INC. $101.42 5 2025
Source payment records
ENHERTU
Normalized: enhertu
Biological, Drug AstraZeneca Pharmaceuticals LP, Daiichi Sankyo Inc. $100.08 5 2025
Source payment records
KEYTRUDA
Normalized: keytruda
Biological Merck Sharp & Dohme LLC $93.72 4 2025
Source payment records
WELIREG
Normalized: welireg
Drug Merck Sharp & Dohme LLC $76.71 3 2025
Source payment records
Lenvima
Normalized: lenvima
Drug Eisai Inc. $75.99 3 2025
Source payment records
XPOVIO
Normalized: xpovio
Drug Karyopharm Therapeutics Inc. $68.21 3 2025
Source payment records
BESREMI
Normalized: besremi
Drug PharmaEssentia USA Corporation $67.86 2 2025
Source payment records
AKEEGA
Normalized: akeega
Drug Janssen Biotech, Inc. $67.30 5 2025
Source payment records
BALVERSA
Normalized: balversa
Drug Janssen Biotech, Inc. $67.30 5 2025
Source payment records
INQOVI
Normalized: inqovi
Drug TAIHO ONCOLOGY, INC. $61.56 3 2025
Source payment records
LONSURF
Normalized: lonsurf
Drug TAIHO ONCOLOGY, INC. $61.56 3 2025
Source payment records
JAKAFI
Normalized: jakafi
Drug Incyte Corporation $61.13 3 2025
Source payment records
OPDIVO
Normalized: opdivo
Biological E.R. Squibb & Sons, L.L.C. $56.74 3 2025
Source payment records
OJJAARA
Normalized: ojjaara
Drug GlaxoSmithKline, LLC. $54.45 3 2025
Source payment records
ORGOVYX
Normalized: orgovyx
Drug Sumitomo Pharma America, Inc. $52.47 3 2025
Source payment records
NERLYNX
Normalized: nerlynx
Drug PUMA BIOTECHNOLOGY, INC. $50.50 2 2025
Source payment records
FOTIVDA
Normalized: fotivda
Drug Aveo Pharmaceuticals, Inc. $47.96 2 2025
Source payment records
Vanflyta
Normalized: vanflyta
Drug Daiichi Sankyo Inc. $46.60 2 2025
Source payment records
Odomzo
Normalized: odomzo
Drug SUN PHARMACEUTICAL INDUSTRIES INC. $42.00 1 2025
Source payment records
YONSA
Normalized: yonsa
Drug SUN PHARMACEUTICAL INDUSTRIES INC. $42.00 1 2025
Source payment records
JAYPIRCA
Normalized: jaypirca
Drug Lilly USA, LLC $38.20 2 2025
Source payment records
VERZENIO
Normalized: verzenio
Drug Lilly USA, LLC $38.20 2 2025
Source payment records
IBRANCE
Normalized: ibrance
Drug PFIZER INC. $36.56 2 2025
Source payment records
DANZITEN
Normalized: danziten
Drug Azurity Pharmaceuticals, Inc. $35.61 2 2025
Source payment records
VIVIMUSTA
Normalized: vivimusta
Drug Azurity Pharmaceuticals, Inc. $35.61 2 2025
Source payment records
ELAHERE
Normalized: elahere
Drug ABBVIE INC. $34.17 1 2025
Source payment records
OPDUALAG
Normalized: opdualag
Drug Celgene Corporation $33.75 1 2025
Source payment records
LYNOZYFIC
Normalized: lynozyfic
Biological Regeneron Healthcare Solutions, Inc. $32.54 1 2025
Source payment records
Onivyde
Normalized: onivyde
Drug Ipsen Biopharmaceuticals, Inc $32.06 1 2025
Source payment records
PROVENGE
Normalized: provenge
Drug Dendreon Pharmaceuticals LLC $32.05 1 2025
Source payment records
SCEMBLIX
Normalized: scemblix
Drug Novartis Pharmaceuticals Corporation $31.64 3 2025
Source payment records
Trelstar
Normalized: trelstar
Drug Verity Pharmaceuticals Inc. $30.92 1 2025
Source payment records
Xtandi
Normalized: xtandi
Drug Astellas Pharma US Inc $29.57 1 2025
Source payment records
GIVLAARI
Normalized: givlaari
Drug Alnylam Pharmaceuticals Inc. $27.79 1 2025
Source payment records
Gavreto
Normalized: gavreto
Drug Rigel Pharmaceuticals, Inc. $27.74 1 2025
Source payment records
Rezlidhia
Normalized: rezlidhia
Drug Rigel Pharmaceuticals, Inc. $27.74 1 2025
Source payment records
TAVALISSE
Normalized: tavalisse
Drug Rigel Pharmaceuticals, Inc. $27.74 1 2025
Source payment records
TIVDAK
Normalized: tivdak
Biological PFIZER INC. $27.46 1 2025
Source payment records
POMALYST
Normalized: pomalyst
Drug Celgene Corporation $27.31 1 2025
Source payment records
RYBREVANT
Normalized: rybrevant
Drug Janssen Biotech, Inc. $25.75 1 2025
Source payment records
Doptelet
Normalized: doptelet
Drug SOBI, INC $24.41 1 2025
Source payment records
DATROWAY
Normalized: datroway
Drug Daiichi Sankyo Inc. $23.22 1 2025
Source payment records
LUTATHERA
Normalized: lutathera
Drug Novartis Pharmaceuticals Corporation $22.63 1 2025
Source payment records
Empaveli
Normalized: empaveli
Drug Apellis Pharmaceuticals, Inc. $22.22 1 2025
Source payment records
RYTELO
Normalized: rytelo
Drug Geron Corporation $22.11 1 2025
Source payment records
PADCEV
Normalized: padcev
Biological PFIZER INC. $22.03 1 2025
Source payment records
ALUNBRIG
Normalized: alunbrig
Drug Takeda Pharmaceuticals U.S.A., Inc. $21.60 1 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $21.12 1 2025
Source payment records
Nubeqa
Normalized: nubeqa
Drug Bayer Healthcare Pharmaceuticals Inc. $19.83 1 2025
Source payment records
LORBRENA
Normalized: lorbrena
Drug ARRAY BIOPHARMA INC $19.62 1 2025
Source payment records
BOSULIF
Normalized: bosulif
Drug PFIZER INC. $19.36 1 2025
Source payment records
MONJUVI
Normalized: monjuvi
Drug Incyte Corporation $18.46 1 2025
Source payment records
AYVAKIT
Normalized: ayvakit
Drug Blueprint Medicines Corporation $18.37 1 2025
Source payment records
TALVEY
Normalized: talvey
Biological Janssen Biotech, Inc. $17.04 1 2025
Source payment records
TECVAYLI
Normalized: tecvayli
Biological Janssen Biotech, Inc. $17.04 1 2025
Source payment records
LIBTAYO
Normalized: libtayo
Biological Regeneron Healthcare Solutions, Inc. $16.55 1 2025
Source payment records
CABOMETYX
Normalized: cabometyx
Drug Exelixis Inc. $16.02 1 2025
Source payment records
Vyloy
Normalized: vyloy
Drug Astellas Pharma US Inc $14.67 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
KEYTRUDA
keytruda
2025 Keytruda 2024 13
Beneficiary count suppressed
exact normalized Medicare Part D
KISQALI
kisqali
2025 Kisqali 2024 12
Beneficiary count suppressed
exact normalized Medicare Part D
LONSURF
lonsurf
2025 Lonsurf 2024 14
Beneficiary count suppressed
exact normalized Medicare Part D
Xtandi
xtandi
2025 Xtandi 2024 20
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 LUPRON DEPOT
open payments reported associated product
CMS Open Payments — General Payments
6475 supporting records · 3205 recipient NPIs · example record 1201352804
Lupron Depot · 2024
Exact normalized brand match · 1 Part D row
14 suppressed by CMS
ARRAY BIOPHARMA INC
Exact reporting entity; no affiliate inference
2025 XTANDI
open payments reported associated product
CMS Open Payments — General Payments
98 supporting records · 88 recipient NPIs · example record 1228800820
Xtandi · 2024
Exact normalized brand match · 1 Part D row
20 suppressed by CMS
Astellas Pharma US Inc
Exact reporting entity; no affiliate inference
2025 Xtandi
open payments reported associated product
CMS Open Payments — General Payments
11345 supporting records · 5418 recipient NPIs · example record 1238560686
Xtandi · 2024
Exact normalized brand match · 1 Part D row
20 suppressed by CMS
Merck Sharp & Dohme LLC
Exact reporting entity; no affiliate inference
2025 KEYTRUDA
open payments reported associated product
CMS Open Payments — General Payments
46588 supporting records · 15767 recipient NPIs · example record 1237992210
Keytruda · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS
Novartis Pharmaceuticals Corporation
Exact reporting entity; no affiliate inference
2025 KISQALI
open payments reported associated product
CMS Open Payments — General Payments
31637 supporting records · 7959 recipient NPIs · example record 1200004789
Kisqali · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 XTANDI
open payments reported associated product
CMS Open Payments — General Payments
19368 supporting records · 7657 recipient NPIs · example record 1228794230
Xtandi · 2024
Exact normalized brand match · 1 Part D row
20 suppressed by CMS
TAIHO ONCOLOGY, INC.
Exact reporting entity; no affiliate inference
2025 LONSURF
open payments reported associated product
CMS Open Payments — General Payments
4796 supporting records · 2963 recipient NPIs · example record 1211403676
Lonsurf · 2024
Exact normalized brand match · 1 Part D row
14 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
AnastrozoleAnastrozole14547
Ondansetron HclOndansetron Hcl5735
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen4123
PrednisonePrednisone4111
HydroxyureaHydroxyurea34suppressed
OlanzapineOlanzapine3412
LetrozoleLetrozole2511
BicalutamideBicalutamide2312
Tamoxifen CitrateTamoxifen Citrate23suppressed
Zoledronic AcidZoledronic Acid23suppressed
LoperamideLoperamide Hcl22suppressed
LorazepamLorazepam20suppressed
XtandiEnzalutamide20suppressed
DexamethasoneDexamethasone19suppressed
Abiraterone AcetateAbiraterone Acetate18suppressed
ExemestaneExemestane18suppressed
Ondansetron HclOndansetron Hcl/Pf18suppressed
FamotidineFamotidine16suppressed
Levothyroxine SodiumLevothyroxine Sodium14suppressed
LonsurfTrifluridine/Tipiracil Hcl14suppressed
Lupron DepotLeuprolide Acetate14suppressed
Dexamethasone Sodium PhosphateDexamethasone Sodium Phosphate13suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine13suppressed
KeytrudaPembrolizumab13suppressed
KisqaliRibociclib Succinate12suppressed
Pantoprazole SodiumPantoprazole Sodium12suppressed
TrazimeraTrastuzumab-Qyyp11suppressed

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 $4,341.25 · 146 records Novartis Pharmaceuticals Corporation ADCETRIS, AKEEGA, ALUNBRIG, AYVAKIT, BALVERSA, BESREMI, BOSULIF, BRAFTOVI, BRUKINSA, CABOMETYX, Cologuard Collection Kit, DANZITEN, DATROWAY, Doptelet, ELAHERE, ELREXFIO, ENHERTU, ERLEADA, Empaveli, FOTIVDA, GIVLAARI, Gavreto, IBRANCE, INQOVI, JAKAFI, JAYPIRCA, KEYTRUDA, KISQALI, LIBTAYO, LONSURF, LORBRENA, LUTATHERA, LYNOZYFIC, Lenvima, MEKTOVI, MONJUVI, NERLYNX, Nubeqa, OJJAARA, OPDIVO, OPDUALAG, ORGOVYX, Odomzo, Onivyde, PADCEV, POMALYST, PROVENGE, REBLOZYL, RYBREVANT, RYTELO, Rezlidhia, SCEMBLIX, TALVEY, TAVALISSE, TECVAYLI, TIVDAK, TUKYSA, Trelstar, VERZENIO, VIVIMUSTA, Vanflyta, Vyloy, WELIREG, XPOVIO, Xtandi, YONSA 7
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