Covered recipient · General Payments record

LEONID SHUNYAKOV

Allopathic & Osteopathic Physicians Internal Medicine Medical Oncology

NPI: 1396709895
CMS profile: 335741
Location: BOLIVAR, MO

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

$324,796.96

410 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 July 26, 2026. 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

Nature of payment	Amount	Records
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$220,065.90	66
Travel and Lodging	$53,327.05	111
Consulting Fee	$32,302.50	16
Honoraria	$11,000.00	3
Food and Beverage	$7,836.48	207
Education	$265.03	7

By paying entity

PY2019 · entire year · sorted by reported total

Paying entity	Amount	Records
E.R. Squibb & Sons, L.L.C.	$198,920.51	166
Merck Sharp & Dohme Corporation	$24,367.48	36
Janssen Biotech, Inc.	$18,711.95	26
Exelixis Inc.	$18,564.00	20
Celgene Corporation	$15,687.51	12
Genentech USA, Inc.	$9,977.97	25
PFIZER INC.	$5,525.34	23
AbbVie, Inc.	$5,400.00	1
GENZYME CORPORATION	$5,365.13	8
Sun Pharmaceutical Industries Inc.	$5,336.18	8
Janssen Scientific Affairs, LLC	$5,076.86	13
Seattle Genetics, Inc.	$4,500.62	14
Pharmacyclics LLC, An AbbVie Company	$3,852.19	9
Takeda Pharmaceuticals U.S.A., Inc.	$1,320.00	1
Bayer HealthCare Pharmaceuticals Inc.	$918.88	2
Novartis Pharmaceuticals Corporation	$210.26	5
AstraZeneca Pharmaceuticals LP	$173.53	5
Foundation Medicine, Inc.	$133.69	4
Array BioPharma Inc.	$121.31	8
Clovis Oncology, Inc.	$120.00	1
EISAI INC.	$95.21	5
TESARO, Inc.	$92.23	1
Amgen Inc.	$67.03	4
Janssen Pharmaceuticals, Inc	$46.54	2
Gilead Sciences, Inc.	$43.55	3
JAZZ PHARMACEUTICALS INC.	$36.51	2
Secura Bio, Inc.	$35.18	1
Lexicon Pharmaceuticals, Inc.	$34.16	1
Ipsen Biopharmaceuticals, Inc	$19.13	1
Teva Pharmaceuticals USA, Inc.	$16.90	1
Astellas Pharma US Inc	$16.10	1
EMD Serono, Inc.	$11.01	1

Page 3 of 9; records 101–150 of 410 matching records. This page contains 50 records (maximum 50), not the full filtered export. Use the CSV download for all matching records.

IndustryPayments · General Payments

LEONID SHUNYAKOV

NPI 1396709895 · CMS profile ID 335741

Allopathic & Osteopathic Physicians / Internal Medicine / Medical Oncology

BOLIVAR, MO

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.

General Payments, PY2019; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types

Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00

Page 3 of 9; records 101–150 of 410 matching records. This page contains 50 records (maximum 50), not the full filtered export.

Filtered page: https://industrypayments.org/provider/npi-1396709895?year=2019&recipient=provider&page=3#records-h

CMS source: https://openpaymentsdata.cms.gov/dataset/4e54dd6c-30f8-4f86-86a7-3c109a89528e

Cite these filtered records

The citation includes this program year, filters, data edition, and page of results.

Plain: LEONID SHUNYAKOV, NPI 1396709895, CMS profile ID 335741. General Payments, PY2019; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types. Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00. Page 3 of 9; records 101–150 of 410 matching records. This page contains 50 records (maximum 50), not the full filtered export. IndustryPayments. https://industrypayments.org/provider/npi-1396709895?year=2019&recipient=provider&page=3#records-h. Source: https://openpaymentsdata.cms.gov/dataset/4e54dd6c-30f8-4f86-86a7-3c109a89528e.
APA 7: IndustryPayments. (2026). LEONID SHUNYAKOV, NPI 1396709895, CMS profile ID 335741. General Payments, PY2019; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types. Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00. Page 3 of 9; records 101–150 of 410 matching records. This page contains 50 records (maximum 50), not the full filtered export. [Filtered data set page]. https://industrypayments.org/provider/npi-1396709895?year=2019&recipient=provider&page=3#records-h. Source: https://openpaymentsdata.cms.gov/dataset/4e54dd6c-30f8-4f86-86a7-3c109a89528e.
Bluebook: LEONID SHUNYAKOV, NPI 1396709895, CMS profile ID 335741, IndustryPayments, General Payments, PY2019; Recipient scope: Physicians and non-physician practitioners; Reporting company: All reporting companies; Nature of payment: All payment types (Data edition: cms-20260630-workflow-20261105-v2; CMS publication: 2026-06-30; records imported: 2026-11-05T09:06:52.159882+00:00). Page 3 of 9; records 101–150 of 410 matching records. This page contains 50 records (maximum 50), not the full filtered export. Source: https://openpaymentsdata.cms.gov/dataset/4e54dd6c-30f8-4f86-86a7-3c109a89528e. https://industrypayments.org/provider/npi-1396709895?year=2019&recipient=provider&page=3#records-h.

Centers for Medicare & Medicaid Services, Open Payments

Citation formats are provided for reference; check the requirements of your publication.

General Payments only. Research Payments and Ownership/Investment Interests are separate datasets and are not included.

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

Centers for Medicare & Medicaid Services, Open Payments

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.

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.

IndustryPayments.org is not a consumer reporting agency as defined by the Fair Credit Reporting Act. Do not use this site to determine any person's eligibility for employment, credentialing, insurance, credit, housing, or any other purpose covered by the FCRA.

Methodology: https://industrypayments.org/methodology

Payment records · PY2019

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

Reporting company Nature of payment

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

410 matching records · $324,796.96 reported total · 0 disputed

Nature of payment: All payment types

Records imported here November 5, 2026 (UTC).

Link to these filtered records · CMS source dataset ↗

Download all 410 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 101–150 of 410.

Paying entity	Amount	Date	Nature of payment	Dispute status	Publication flags	Published	Record ID	Source
E.R. Squibb & Sons, L.L.C.	$109.47	10/04/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357163	CMS
E.R. Squibb & Sons, L.L.C.	$25.00	10/04/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357165	CMS
E.R. Squibb & Sons, L.L.C.	$88.40	10/04/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357167	CMS
Bayer HealthCare Pharmaceuticals Inc.	$900.00	10/03/2019	Consulting Fee	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	628490987	CMS
Astellas Pharma US Inc	$16.10	10/02/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	655761521	CMS
Foundation Medicine, Inc.	$19.20	10/02/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	675551667	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$1,320.00	10/01/2019	Consulting Fee	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	697411663	CMS
Merck Sharp & Dohme Corporation	$7.52	09/30/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	695750165	CMS
EISAI INC.	$21.97	09/28/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	697015249	CMS
E.R. Squibb & Sons, L.L.C.	$110.81	09/26/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357109	CMS
Seattle Genetics, Inc.	$12.67	09/26/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	678804185	CMS
TESARO, Inc.	$92.23	09/24/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	675569709	CMS
Janssen Biotech, Inc.	$6.40	09/23/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	658715539	CMS
Array BioPharma Inc.	$17.56	09/20/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	700969821	CMS
Celgene Corporation	$226.20	09/20/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	672922039	CMS
Celgene Corporation	$4,875.00	09/20/2019	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	06/30/2026	672927499	CMS
Celgene Corporation	$9.50	09/20/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	672927744	CMS
Bayer HealthCare Pharmaceuticals Inc.	$18.88	09/17/2019	Education	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	628451921	CMS
Pharmacyclics LLC, An AbbVie Company	$15.69	09/12/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	665708835	CMS
Celgene Corporation	$124.84	09/04/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	672923965	CMS
E.R. Squibb & Sons, L.L.C.	$4,310.00	09/04/2019	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	06/30/2026	651357095	CMS
E.R. Squibb & Sons, L.L.C.	$4,310.00	09/04/2019	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	06/30/2026	651357161	CMS
Genentech USA, Inc.	$13.11	09/04/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	681388035	CMS
EISAI INC.	$18.73	08/31/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	697014399	CMS
Genentech USA, Inc.	$75.99	08/30/2019	Education	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	857132929	CMS
Janssen Biotech, Inc.	$7.15	08/28/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	658715535	CMS
Janssen Pharmaceuticals, Inc	$8.54	08/28/2019	Education	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	659291327	CMS
PFIZER INC.	$12.00	08/28/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	672637797	CMS
Genentech USA, Inc.	$13.15	08/27/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	681397613	CMS
E.R. Squibb & Sons, L.L.C.	$482.41	08/26/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357097	CMS
E.R. Squibb & Sons, L.L.C.	$166.47	08/26/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357099	CMS
E.R. Squibb & Sons, L.L.C.	$115.10	08/26/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357101	CMS
E.R. Squibb & Sons, L.L.C.	$1,274.08	08/26/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357107	CMS
Pharmacyclics LLC, An AbbVie Company	$11.62	08/23/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	665707297	CMS
Merck Sharp & Dohme Corporation	$17.93	08/20/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	695719727	CMS
E.R. Squibb & Sons, L.L.C.	$32.00	08/19/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357027	CMS
E.R. Squibb & Sons, L.L.C.	$50.35	08/19/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357049	CMS
Amgen Inc.	$12.48	08/13/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	662636587	CMS
PFIZER INC.	$10.67	08/08/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	672512495	CMS
E.R. Squibb & Sons, L.L.C.	$32.00	08/07/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357025	CMS
E.R. Squibb & Sons, L.L.C.	$19.79	08/07/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357051	CMS
E.R. Squibb & Sons, L.L.C.	$76.41	08/07/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357053	CMS
E.R. Squibb & Sons, L.L.C.	$32.00	08/07/2019	Travel and Lodging	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	651357069	CMS
PFIZER INC.	$10.13	08/07/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	672546219	CMS
Novartis Pharmaceuticals Corporation	$12.72	08/06/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	660089693	CMS
Sun Pharmaceutical Industries Inc.	$39.72	08/03/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	704602581	CMS
Sun Pharmaceutical Industries Inc.	$28.76	08/03/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	704602583	CMS
Sun Pharmaceutical Industries Inc.	$59.91	08/03/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	704602585	CMS
Sun Pharmaceutical Industries Inc.	$4,400.00	08/03/2019	Honoraria	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	704602593	CMS
Sun Pharmaceutical Industries Inc.	$28.76	08/03/2019	Food and Beverage	No dispute reported	Delay: No Change: UNCHANGED	06/30/2026	704602595	CMS

By program year

All program years on this page · sorted by year

Program year	Amount	Records
PY2019	$324,796.96	410
PY2020	$129,096.10	205
PY2021	$233,777.75	277
PY2022	$334,003.60	455
PY2023	$348,699.85	445
PY2024	$327,068.46	442
PY2025	$389,146.89	417

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

Source files: Dataset page · Bulk file · PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024 , PY2025
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.