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 · PY2019 · Entire year

$84,897.21

165 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

PY2019 · entire year · sorted by reported total

By paying entity

PY2019 · entire year · sorted by reported total

Payment records · PY2019

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

General Payments · PY2019 · Physicians and non-physician practitioners · CMS publication 2026-06-30

165 matching records · $84,897.21 reported total · 0 disputed

Nature of payment: All payment types

Records imported here (UTC).

Link to these filtered records · CMS source dataset ↗

Download all 165 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 165.

Paying entityAmountDate Nature of paymentDispute statusPublication flagsPublished Record IDSource
Janssen Biotech, Inc. $2,000.0012/20/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026658584063 CMS
Celgene Corporation $22.9512/19/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026672992569 CMS
E.R. Squibb & Sons, L.L.C. $14.9612/18/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246417 CMS
Gilead Sciences, Inc. $16.6412/13/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026681561887 CMS
Takeda Pharmaceuticals U.S.A., Inc. $13.9512/13/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026697407631 CMS
Lilly USA, LLC $21.6812/09/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026657666995 CMS
Amgen Inc. $41.8711/26/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170001 CMS
Secura Bio, Inc. $1.8311/21/2019 Food and Beverage No dispute reported Delay: No
Change: CHANGED
06/30/2026625211879 CMS
Secura Bio, Inc. $17.1111/21/2019 Food and Beverage No dispute reported Delay: No
Change: CHANGED
06/30/2026625211887 CMS
E.R. Squibb & Sons, L.L.C. $10.3311/14/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246415 CMS
Lilly USA, LLC $20.2011/07/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026657670405 CMS
Amgen Inc. $382.7811/05/2019 Travel and Lodging No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170013 CMS
Merck Sharp & Dohme Corporation $19.4511/05/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026695822717 CMS
Novartis Pharmaceuticals Corporation $17.3611/04/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026659764743 CMS
Amgen Inc. $3,000.0010/31/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170009 CMS
Amgen Inc. $500.0010/31/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170011 CMS
Bayer HealthCare Pharmaceuticals Inc. $20.8910/31/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026628432921 CMS
Celgene Corporation $20.6710/31/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026672939345 CMS
E.R. Squibb & Sons, L.L.C. $20.8910/30/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246407 CMS
E.R. Squibb & Sons, L.L.C. $0.4410/30/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246409 CMS
Amgen Inc. $22.7610/29/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170017 CMS
Novartis Pharmaceuticals Corporation $20.5210/29/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026659764699 CMS
Amgen Inc. $120.7710/24/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170003 CMS
Janssen Biotech, Inc. $500.0010/23/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026658584059 CMS
Puma Biotechnology, Inc. $18.6810/23/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026706022715 CMS
Amgen Inc. $3,000.0010/21/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170007 CMS
Amgen Inc. $92.8510/16/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170005 CMS
Janssen Biotech, Inc. $22.8710/15/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026658584055 CMS
Amgen Inc. $27.2710/14/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662170015 CMS
Astellas Pharma US Inc $23.2810/14/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026655681739 CMS
Secura Bio, Inc. $14.7010/11/2019 Food and Beverage No dispute reported Delay: No
Change: CHANGED
06/30/2026625211701 CMS
Amgen Inc. $811.2010/09/2019 Travel and Lodging No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169991 CMS
Novartis Pharmaceuticals Corporation $22.5510/09/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026659764721 CMS
Amgen Inc. $3,000.0010/07/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169975 CMS
Amgen Inc. $3,000.0010/07/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169977 CMS
Amgen Inc. $3,000.0010/07/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169979 CMS
Amgen Inc. $1,000.0010/07/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169981 CMS
Amgen Inc. $1,000.0010/07/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169983 CMS
Amgen Inc. $500.0010/07/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169985 CMS
Amgen Inc. $223.5210/07/2019 Travel and Lodging No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169993 CMS
Array BioPharma Inc. $23.7910/07/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026700971381 CMS
Amgen Inc. $464.4410/04/2019 Travel and Lodging No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169995 CMS
AstraZeneca Pharmaceuticals LP $17.9910/02/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026685909813 CMS
Novartis Pharmaceuticals Corporation $5.9210/02/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026659764737 CMS
E.R. Squibb & Sons, L.L.C. $0.3209/30/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246399 CMS
E.R. Squibb & Sons, L.L.C. $21.4509/30/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246401 CMS
E.R. Squibb & Sons, L.L.C. $0.5009/30/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026651246403 CMS
Amgen Inc. $122.3509/26/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169969 CMS
Amgen Inc. $119.4309/25/2019 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026662169971 CMS
Janssen Biotech, Inc. $1,000.0009/25/2019 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program No dispute reported Delay: No
Change: UNCHANGED
06/30/2026658584051 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.