Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · CMS publication 2026-06-30 View official record

Covered recipient · General Payments record

AMITABHA MAZUMDER

Allopathic & Osteopathic Physicians Internal Medicine Hematology & Oncology

NPI
1881682318
CMS profile
84992
Location
DOWNEY, CA

A name match is not confirmation of identity. CMS publishes records for different people under similar names; the NPI, specialty, and location shown on this page are the CMS-published fields that distinguish them.

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General Payments · PY2024 · Entire year

$5,997.55

204 records · 0 disputed

Summary and payment records

  • CMS publication 2026-06-30
Read the payment records

Other CMS categories — not shown on this page

Research Payments

CMS also publishes Research Payments as a separate dataset. This site does not currently mirror it, and no research figure is shown on this page. This provider appears in that dataset.

“If you are a physician who served as a principal investigator on a research study, you may see the payments associated with that research study listed under your name. This does not necessarily mean the payments are attributed to you. The dollar amount of the record corresponds to the total payment; the amounts are not attributed to each individual on the record.”

— Centers for Medicare & Medicaid Services, Open Payments Frequently Asked Questions, FAQ #12224

These records are published by CMS and can be viewed on this provider’s official CMS record. View this provider on CMS Open Payments ↗

“Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.”

— Centers for Medicare & Medicaid Services, Open Payments

A reported payment reflects a financial relationship a company disclosed. It does not indicate wrongdoing or a conflict of interest, and it says nothing about the quality of a provider's care.

These records are submitted to CMS and attested to by the reporting companies. CMS publishes them as reported; this site mirrors them without independent verification.

A payment attributed to a provider may have been made to a third party — a hospital, practice, or research institution — rather than paid to the provider personally.

How these totals are calculated
  • This total is the sum of the individual General Payments record amounts CMS published for the labeled program year(s); each record amount is used unmodified. The total itself is computed by this site. Nothing is estimated, weighted, or combined across categories.
  • General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
  • Methodology & Data — sourcing, labeling, and limitations.

Provider summaries generated . CMS updates this data on an annual cycle, and corrections or successful disputes made at CMS may not yet appear here. The official CMS record is authoritative for the current state. View the official CMS record ↗

By nature of payment

PY2024 · entire year · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $4,210.75 193
Long term medical supply or device loan $897.30 9
Consulting Fee $889.50 2

By paying entity

PY2024 · entire year · sorted by reported total

Paying entityAmountRecords
Novartis Pharmaceuticals Corporation $1,142.19 20
E.R. Squibb & Sons, L.L.C. $986.09 8
AstraZeneca Pharmaceuticals LP $333.28 16
Merck Sharp & Dohme LLC $286.58 11
PFIZER INC. $281.18 17
Janssen Biotech, Inc. $233.23 12
Takeda Pharmaceuticals U.S.A., Inc. $177.59 7
SOBI, INC $162.38 10
Gilead Sciences, Inc. $161.86 7
ABBVIE INC. $151.23 9
Celgene Corporation $151.19 9
GENZYME CORPORATION $137.27 4
Karyopharm Therapeutics Inc. $117.86 4
TAIHO ONCOLOGY, INC. $106.74 4
Lilly USA, LLC $100.16 5
Blueprint Medicines Corporation $88.31 4
Alexion Pharmaceuticals, Inc. $87.46 3
Eisai Inc. $82.22 4
Genentech USA, Inc. $75.28 3
Incyte Corporation $71.47 3
Agios Pharmaceuticals, Inc. $69.47 3
ARRAY BIOPHARMA INC $66.70 3
Daiichi Sankyo Inc. $65.29 3
Astellas Pharma US Inc $61.44 3
PharmaEssentia USA Corporation $52.73 2
Stemline Therapeutics Inc. $52.39 2
SUN PHARMACEUTICAL INDUSTRIES INC. $52.35 2
Bayer Healthcare Pharmaceuticals Inc. $51.77 2
EMD Serono, Inc. $47.05 2
Genmab U.S., Inc. $43.89 2
Exelixis Inc. $43.19 2
GlaxoSmithKline, LLC. $42.98 2
Novocure Inc. $42.30 2
Ipsen Biopharmaceuticals, Inc $41.32 2
Immunocore Limited $39.41 1
Regeneron Healthcare Solutions, Inc. $36.97 1
TerSera Therapeutics LLC $36.40 1
Sumitomo Pharma America, Inc. $29.22 1
ADC Therapeutics America, Inc. $27.66 1
Boehringer Ingelheim Pharmaceuticals, Inc. $26.48 1
Kyowa Kirin, Inc. $25.00 1
Adaptive Biotechnologies Corporation $24.54 1
Tolmar, Inc. $24.37 1
PROGENICS PHARMACEUTICALS, INC. $23.99 1
Rigel Pharmaceuticals, Inc. $21.41 1
Mirati Therapeutics, Inc. $15.66 1

Payment records · PY2024

Ordering applied by this site (date, newest first, then paying entity) · record values are shown as CMS published them

General Payments · PY2024 · Physicians and non-physician practitioners · CMS publication 2026-06-30

204 matching records · $5,997.55 reported total · 0 disputed

Nature of payment: All payment types

Records imported here (UTC).

Link to these filtered records · CMS source dataset ↗

Download all 204 matching records (CSV)

CSV includes CMS record IDs, source and publication dates, the data edition, and a link to these filters. Formula-like text cells are prefixed with an apostrophe for spreadsheet safety.

Showing records 1–50 of 204.

Paying entityAmountDate Nature of paymentDispute statusPublication flagsPublished Record IDSource
Regeneron Healthcare Solutions, Inc. $36.9712/31/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261114110601 CMS
GlaxoSmithKline, LLC. $18.3212/27/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261116385316 CMS
Bayer Healthcare Pharmaceuticals Inc. $22.0312/24/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261086201614 CMS
AstraZeneca Pharmaceuticals LP $21.6012/23/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261105252599 CMS
Celgene Corporation $18.2112/19/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261101084789 CMS
Janssen Biotech, Inc. $11.7912/19/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261078293141 CMS
Janssen Biotech, Inc. $1.5312/19/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261078293369 CMS
Agios Pharmaceuticals, Inc. $24.8912/17/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261149641508 CMS
Takeda Pharmaceuticals U.S.A., Inc. $33.1812/16/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261144962616 CMS
Takeda Pharmaceuticals U.S.A., Inc. $33.5312/13/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261144962614 CMS
ABBVIE INC. $30.6212/12/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261104990871 CMS
AstraZeneca Pharmaceuticals LP $22.0812/12/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261104513440 CMS
Novartis Pharmaceuticals Corporation $99.7012/10/2024 Long term medical supply or device loan No dispute reported Delay: No
Change: UNCHANGED
06/30/20261087041142 CMS
TerSera Therapeutics LLC $36.4012/10/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261144712527 CMS
TAIHO ONCOLOGY, INC. $29.1912/07/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261137940966 CMS
Novocure Inc. $21.2412/05/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261123333806 CMS
Merck Sharp & Dohme LLC $18.9912/03/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261141780479 CMS
SOBI, INC $3.7911/26/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261141429101 CMS
SOBI, INC $25.8211/26/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261141430795 CMS
SOBI, INC $0.6311/25/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261141429797 CMS
Takeda Pharmaceuticals U.S.A., Inc. $32.6111/25/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261144962612 CMS
Novartis Pharmaceuticals Corporation $31.1311/21/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261087041140 CMS
Janssen Biotech, Inc. $23.1711/19/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261078293263 CMS
Agios Pharmaceuticals, Inc. $26.0811/18/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261149645380 CMS
Astellas Pharma US Inc $20.0411/14/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261139432840 CMS
Novartis Pharmaceuticals Corporation $99.7011/14/2024 Long term medical supply or device loan No dispute reported Delay: No
Change: UNCHANGED
06/30/20261087041136 CMS
ADC Therapeutics America, Inc. $27.6611/12/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261121189346 CMS
AstraZeneca Pharmaceuticals LP $18.5311/11/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261105252452 CMS
Incyte Corporation $24.5811/11/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261141313271 CMS
TAIHO ONCOLOGY, INC. $25.7511/08/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261137943077 CMS
Celgene Corporation $17.8711/07/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261101084785 CMS
Celgene Corporation $3.7411/07/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261101084787 CMS
SUN PHARMACEUTICAL INDUSTRIES INC. $28.2011/05/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261152123787 CMS
PFIZER INC. $17.9110/31/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261131390900 CMS
Celgene Corporation $24.4710/29/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261101084783 CMS
Boehringer Ingelheim Pharmaceuticals, Inc. $26.4810/28/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261118211927 CMS
E.R. Squibb & Sons, L.L.C. $593.0010/17/2024 Consulting Fee No dispute reported Delay: No
Change: UNCHANGED
06/30/20261101229249 CMS
E.R. Squibb & Sons, L.L.C. $296.5010/17/2024 Consulting Fee No dispute reported Delay: No
Change: UNCHANGED
06/30/20261101229305 CMS
Novartis Pharmaceuticals Corporation $99.7010/17/2024 Long term medical supply or device loan No dispute reported Delay: No
Change: UNCHANGED
06/30/20261087041138 CMS
AstraZeneca Pharmaceuticals LP $20.6810/11/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261105238450 CMS
Novartis Pharmaceuticals Corporation $28.0610/09/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261087041134 CMS
Gilead Sciences, Inc. $33.6410/08/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261133805137 CMS
Incyte Corporation $19.3510/07/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261141291448 CMS
PFIZER INC. $23.4110/03/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261131372833 CMS
Janssen Biotech, Inc. $25.8710/01/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261078293111 CMS
ARRAY BIOPHARMA INC $19.3409/30/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261131360010 CMS
AstraZeneca Pharmaceuticals LP $16.7109/27/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261104236223 CMS
Genentech USA, Inc. $23.1009/27/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261132975301 CMS
Novartis Pharmaceuticals Corporation $99.7009/27/2024 Long term medical supply or device loan No dispute reported Delay: No
Change: UNCHANGED
06/30/20261087041124 CMS
Novocure Inc. $21.0609/26/2024 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261123333804 CMS

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2019 $84,897.21 165
PY2020 $35,719.17 120
PY2021 $31,614.85 123
PY2022 $22,415.70 152
PY2023 $19,837.46 180
PY2024 $5,997.55 204
PY2025 $6,517.05 163

Source & provenance

Dataset
CMS Open Payments — General Payments
Publisher of source data
Centers for Medicare & Medicaid Services
CMS publication date
2026-06-30
Program years on this page
2019, 2020, 2021, 2022, 2023, 2024, 2025
Source files and profile matching
Generated from
OP_DTL_GNRL_PGYR2025_P06302026_06032026.csv

One page per canonical provider; split Profile_IDs are merged via Associated_Covered_Recipient_Profile_ID_1/_2 from the Covered Recipient Profile Supplement.

Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.

Cite this record.

Plain
AMITABHA MAZUMDER, NPI 1881682318. IndustryPayments, data edition 2026-07-26T04:22:22Z. https://industrypayments.org/provider/npi-1881682318.
APA 7
IndustryPayments. (2026). AMITABHA MAZUMDER, NPI 1881682318 (Data edition 2026-07-26T04:22:22Z) [Data set]. https://industrypayments.org/provider/npi-1881682318
Bluebook
AMITABHA MAZUMDER, NPI 1881682318, IndustryPayments (data edition 2026-07-26T04:22:22Z), https://industrypayments.org/provider/npi-1881682318.

Source: Centers for Medicare & Medicaid Services, Open Payments.