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

JACEK ZAJAC

Allopathic & Osteopathic Physicians Internal Medicine Endocrinology, Diabetes & Metabolism

NPI
1396817912
CMS profile
199020
Location
LOMBARD, IL

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 · PY2023 · Entire year

$4,519.09

228 records · 0 disputed

Summary and payment records

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

“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

PY2023 · entire year · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $4,409.11 223
Gift $59.40 1
Education $50.58 4

By paying entity

PY2023 · entire year · sorted by reported total

Payment records · PY2023

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

General Payments · PY2023 · Physicians and non-physician practitioners · CMS publication 2026-06-30

228 matching records · $4,519.09 reported total · 0 disputed

Nature of payment: All payment types

Records imported here (UTC).

Link to these filtered records · CMS source dataset ↗

Download all 228 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 228.

Paying entityAmountDate Nature of paymentDispute statusPublication flagsPublished Record IDSource
Dexcom, Inc. $7.3312/21/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261054720095 CMS
Dexcom, Inc. $3.7712/21/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261054720105 CMS
TheracosBio, LLC $10.9112/21/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261051617183 CMS
Bayer Healthcare Pharmaceuticals Inc. $13.0512/19/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000443433 CMS
Xeris Pharmaceuticals, Inc. $24.7812/19/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261056465357 CMS
Xeris Pharmaceuticals, Inc. $12.2512/19/2023 Education No dispute reported Delay: No
Change: UNCHANGED
06/30/20261056465361 CMS
Corcept Therapeutics $33.8912/15/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261050827533 CMS
Lilly USA, LLC $26.7012/14/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031697422 CMS
Boehringer Ingelheim Pharmaceuticals, Inc. $17.8612/13/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026996606407 CMS
Novo Nordisk Inc $23.1212/12/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000863253 CMS
MannKind Corporation $24.7312/11/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261056316257 CMS
SANOFI-AVENTIS U.S. LLC $18.6112/06/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261049926069 CMS
RECORDATI_RARE_DISEASES_INC. $23.3812/05/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261060355777 CMS
RECORDATI_RARE_DISEASES_INC. $2.8112/05/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261060355779 CMS
Dexcom, Inc. $27.4012/04/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261054720073 CMS
Novartis Pharmaceuticals Corporation $26.3511/28/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026993416725 CMS
Corcept Therapeutics $28.6511/27/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261050827529 CMS
SANOFI-AVENTIS U.S. LLC $21.8911/21/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261049926049 CMS
Amgen Inc. $17.1611/20/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261019938917 CMS
Lilly USA, LLC $19.0211/17/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031595163 CMS
Novo Nordisk Inc $24.6211/16/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000863333 CMS
RECORDATI_RARE_DISEASES_INC. $21.3611/16/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261060355775 CMS
Boehringer Ingelheim Pharmaceuticals, Inc. $22.6811/15/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026996606411 CMS
Embecta Corp. $20.7911/14/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261051587929 CMS
Dexcom, Inc. $27.1011/09/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261054720085 CMS
SANOFI-AVENTIS U.S. LLC $48.6511/09/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261049926085 CMS
Lilly USA, LLC $25.8811/08/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031595143 CMS
AbbVie Inc. $17.2611/03/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026999825975 CMS
Bayer Healthcare Pharmaceuticals Inc. $19.3411/02/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000462397 CMS
Boehringer Ingelheim Pharmaceuticals, Inc. $33.5311/01/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026997112979 CMS
Lilly USA, LLC $24.0910/31/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031664723 CMS
Xeris Pharmaceuticals, Inc. $20.8110/31/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261056465410 CMS
MannKind Corporation $24.8510/30/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261056316247 CMS
Novo Nordisk Inc $10.3210/30/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000863126 CMS
Insulet Corporation $15.7910/27/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261016967567 CMS
Tandem Diabetes Care, Inc. $23.8310/27/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261060264367 CMS
MannKind Corporation $10.0010/26/2023 Education No dispute reported Delay: No
Change: UNCHANGED
06/30/20261056316235 CMS
Novartis Pharmaceuticals Corporation $21.5510/26/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026993416723 CMS
Lilly USA, LLC $1.7310/25/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031595159 CMS
Lilly USA, LLC $25.8710/25/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031664753 CMS
SANOFI-AVENTIS U.S. LLC $23.2710/24/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261049926037 CMS
Lilly USA, LLC $27.9910/23/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031480635 CMS
Novo Nordisk Inc $20.5510/23/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000863211 CMS
Lilly USA, LLC $26.2110/16/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261031532911 CMS
Kyowa Kirin, Inc. $23.2210/11/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261026997843 CMS
AbbVie Inc. $24.0410/09/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026999825967 CMS
Boehringer Ingelheim Pharmaceuticals, Inc. $12.3710/04/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/2026996606415 CMS
Dexcom, Inc. $34.8810/02/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261054720127 CMS
Novo Nordisk Inc $19.2609/29/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261000863183 CMS
Amryt Pharma Holdings Ltd $21.9509/28/2023 Food and Beverage No dispute reported Delay: No
Change: UNCHANGED
06/30/20261051600192 CMS

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2019 $3,234.51 224
PY2020 $2,584.40 142
PY2021 $3,599.68 192
PY2022 $4,039.38 233
PY2023 $4,519.09 228
PY2024 $4,452.55 223
PY2025 $3,697.40 183

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
JACEK ZAJAC, NPI 1396817912. IndustryPayments, data edition 2026-07-26T04:22:22Z. https://industrypayments.org/provider/npi-1396817912.
APA 7
IndustryPayments. (2026). JACEK ZAJAC, NPI 1396817912 (Data edition 2026-07-26T04:22:22Z) [Data set]. https://industrypayments.org/provider/npi-1396817912
Bluebook
JACEK ZAJAC, NPI 1396817912, IndustryPayments (data edition 2026-07-26T04:22:22Z), https://industrypayments.org/provider/npi-1396817912.

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