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

Reflects CMS Open Payments as of 2026-07-26T04:22:22Z. 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 ↗

Covered recipient · General Payments record

MARK JOSEPH FESLER

Allopathic & Osteopathic Physicians Internal Medicine Hematology & Oncology

NPI
1235204066
CMS profile
328476
Location
SAINT LOUIS, 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.

General Payments · PY2019–2025

  • CMS publication 2026-06-30

Latest program year · PY2025

$195,857.86

114 records · 0 disputed

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.
  • Featured-page threshold (a presentation gate, not a judgment): (records>=3 OR total>=100) AND records>=2 AND NPI identity (all years).
  • Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2025 · sorted by reported total

By paying entity

PY2025 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2019 $56,258.52 60
PY2020 $45,089.05 29
PY2021 $111,652.62 64
PY2022 $113,026.05 66
PY2023 $155,757.93 130
PY2024 $192,797.48 134
PY2025 $195,857.86 114

Payment records · PY2025 (114)

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

Program year 2025 201920202021202220232024 Record-level detail is published for PY2025; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
Incyte Corporation $2,055.00 12/19/2025 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 06/30/2026 1226022864 CMS
Regeneron Healthcare Solutions, Inc. $4,986.00 12/19/2025 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 06/30/2026 1212919030 CMS
E.R. Squibb & Sons, L.L.C. $7.71 12/16/2025 Food and Beverage No dispute reported 06/30/2026 1184625633 CMS
Regeneron Healthcare Solutions, Inc. $820.76 12/16/2025 Travel and Lodging No dispute reported 06/30/2026 1212919028 CMS
ABBVIE INC. $2,400.00 12/03/2025 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 06/30/2026 1201852358 CMS
BeOne Medicines USA, Inc. $108.93 12/02/2025 Food and Beverage No dispute reported 06/30/2026 1202904396 CMS
BeOne Medicines USA, Inc. $4,500.00 12/02/2025 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 06/30/2026 1202904398 CMS
Incyte Corporation $2,055.00 11/24/2025 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 06/30/2026 1225971725 CMS
AstraZeneca Pharmaceuticals LP $2,870.00 11/20/2025 Consulting Fee No dispute reported 06/30/2026 1206632297 CMS
Incyte Corporation $2,055.00 11/19/2025 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 06/30/2026 1225971727 CMS
Incyte Corporation $2,740.00 11/19/2025 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 06/30/2026 1225971729 CMS
Incyte Corporation $4,110.00 11/19/2025 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 06/30/2026 1225971735 CMS
Incyte Corporation $105.24 11/13/2025 Food and Beverage No dispute reported 06/30/2026 1225971360 CMS
Incyte Corporation $973.20 11/13/2025 Travel and Lodging No dispute reported 06/30/2026 1225971731 CMS
Incyte Corporation $126.39 11/11/2025 Food and Beverage No dispute reported 06/30/2026 1225971733 CMS
Lilly USA, LLC $1,250.00 11/07/2025 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 06/30/2026 1186771052 CMS
ADC THERAPEUTICS AMERICA, INC. $5,840.00 11/04/2025 Honoraria No dispute reported 06/30/2026 1246129984 CMS
ADC THERAPEUTICS AMERICA, INC. $125.00 10/30/2025 Food and Beverage No dispute reported 06/30/2026 1246129756 CMS
ADC THERAPEUTICS AMERICA, INC. $915.60 10/30/2025 Travel and Lodging No dispute reported 06/30/2026 1246129961 CMS
GENZYME CORPORATION $3,740.00 10/30/2025 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 06/30/2026 1233405316 CMS
Genentech USA, Inc. $1,160.00 10/29/2025 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 06/30/2026 1211544031 CMS
Genmab U.S., Inc. $600.00 10/29/2025 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 06/30/2026 1235922452 CMS
Regeneron Healthcare Solutions, Inc. $4,986.00 10/28/2025 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 06/30/2026 1212919026 CMS
ABBVIE INC. $8.89 10/24/2025 Food and Beverage No dispute reported 06/30/2026 1201852356 CMS
Regeneron Healthcare Solutions, Inc. $124.99 10/23/2025 Food and Beverage No dispute reported 06/30/2026 1212919024 CMS
Incyte Corporation $2,740.00 10/21/2025 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 06/30/2026 1226122503 CMS
ABBVIE INC. $800.00 10/16/2025 Consulting Fee No dispute reported 06/30/2026 1201852354 CMS
Incyte Corporation $128.09 10/16/2025 Food and Beverage No dispute reported 06/30/2026 1226163546 CMS
E.R. Squibb & Sons, L.L.C. $7.79 10/13/2025 Food and Beverage No dispute reported 06/30/2026 1184625572 CMS
BeOne Medicines USA, Inc. $112.30 10/02/2025 Food and Beverage No dispute reported 06/30/2026 1202904388 CMS
BeOne Medicines USA, Inc. $4,500.00 10/02/2025 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 06/30/2026 1202904390 CMS
Incyte Corporation $4,110.00 10/01/2025 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 06/30/2026 1226032411 CMS
ABBVIE INC. $4,000.00 09/25/2025 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 06/30/2026 1201852352 CMS
Incyte Corporation $1,030.44 09/25/2025 Travel and Lodging No dispute reported 06/30/2026 1226032325 CMS
Incyte Corporation $129.63 09/25/2025 Food and Beverage No dispute reported 06/30/2026 1226032705 CMS
ABBVIE INC. $35.32 09/18/2025 Food and Beverage No dispute reported 06/30/2026 1201852350 CMS
Incyte Corporation $2,055.00 09/16/2025 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 06/30/2026 1226032719 CMS
ABBVIE INC. $120.26 09/11/2025 Food and Beverage No dispute reported 06/30/2026 1201852348 CMS
Lilly USA, LLC $1,250.00 09/11/2025 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 06/30/2026 1186818806 CMS
Incyte Corporation $4,110.00 09/10/2025 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 06/30/2026 1226032467 CMS
BeOne Medicines USA, Inc. $2,344.00 09/09/2025 Consulting Fee No dispute reported 06/30/2026 1202904392 CMS
ABBVIE INC. $800.00 09/04/2025 Consulting Fee No dispute reported 06/30/2026 1201852346 CMS
Incyte Corporation $73.13 09/04/2025 Food and Beverage No dispute reported 06/30/2026 1226031837 CMS
Incyte Corporation $915.95 09/04/2025 Travel and Lodging No dispute reported 06/30/2026 1226032041 CMS
Secura Bio, Inc. $15.58 09/04/2025 Food and Beverage No dispute reported 06/30/2026 1193370667 CMS
ABBVIE INC. $87.42 08/28/2025 Food and Beverage No dispute reported 06/30/2026 1201852344 CMS
Regeneron Healthcare Solutions, Inc. $900.25 08/26/2025 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 06/30/2026 1212919022 CMS
Genmab U.S., Inc. $2,400.00 08/13/2025 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 06/30/2026 1235922448 CMS
GlaxoSmithKline, LLC. $18.07 08/12/2025 Food and Beverage No dispute reported 06/30/2026 1190383107 CMS
Incyte Corporation $1,027.50 08/07/2025 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 06/30/2026 1226163534 CMS
Incyte Corporation $1,027.50 07/31/2025 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 06/30/2026 1226168883 CMS
ADC THERAPEUTICS AMERICA, INC. $1,130.56 07/22/2025 Travel and Lodging No dispute reported 06/30/2026 1246126001 CMS
ADC THERAPEUTICS AMERICA, INC. $5,840.00 07/22/2025 Honoraria No dispute reported 06/30/2026 1246129518 CMS
ADC THERAPEUTICS AMERICA, INC. $103.66 07/18/2025 Food and Beverage No dispute reported 06/30/2026 1246111293 CMS
ABBVIE INC. $800.00 07/17/2025 Consulting Fee No dispute reported 06/30/2026 1201852342 CMS
Incyte Corporation $1,027.50 07/10/2025 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 06/30/2026 1226041994 CMS
ABBVIE INC. $8.12 07/09/2025 Food and Beverage No dispute reported 06/30/2026 1201852340 CMS
Lilly USA, LLC $2,187.50 07/07/2025 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 06/30/2026 1186771050 CMS
AstraZeneca Pharmaceuticals LP $2,460.00 07/01/2025 Consulting Fee No dispute reported 06/30/2026 1206526546 CMS
ADC THERAPEUTICS AMERICA, INC. $3,650.00 06/26/2025 Honoraria No dispute reported 06/30/2026 1246117669 CMS
ABBVIE INC. $5,600.00 06/23/2025 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 06/30/2026 1201852338 CMS
ADC THERAPEUTICS AMERICA, INC. $130.75 06/19/2025 Food and Beverage No dispute reported 06/30/2026 1246117222 CMS
BeOne Medicines USA, Inc. $19.00 06/18/2025 Travel and Lodging No dispute reported 06/30/2026 1202904380 CMS
BeOne Medicines USA, Inc. $148.02 06/12/2025 Food and Beverage No dispute reported 06/30/2026 1202904382 CMS
BeOne Medicines USA, Inc. $4,500.00 06/12/2025 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 06/30/2026 1202904384 CMS
Incyte Corporation $2,055.00 06/12/2025 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 06/30/2026 1226033133 CMS
Lilly USA, LLC $1,250.00 06/12/2025 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 06/30/2026 1186805235 CMS
ADC THERAPEUTICS AMERICA, INC. $3,650.00 06/04/2025 Honoraria No dispute reported 06/30/2026 1246115632 CMS
Incyte Corporation $4,110.00 06/03/2025 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 06/30/2026 1226033653 CMS
Incyte Corporation $4,110.00 06/03/2025 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 06/30/2026 1226044046 CMS
ADC THERAPEUTICS AMERICA, INC. $91.54 05/30/2025 Food and Beverage No dispute reported 06/30/2026 1246115768 CMS
ABBVIE INC. $5,600.00 05/27/2025 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 06/30/2026 1201852336 CMS
GlaxoSmithKline, LLC. $26.97 05/20/2025 Food and Beverage No dispute reported 06/30/2026 1190380909 CMS
Lilly USA, LLC $2,500.00 05/16/2025 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 06/30/2026 1186830580 CMS
Lilly USA, LLC $950.00 05/16/2025 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 06/30/2026 1186830582 CMS
Incyte Corporation $75.68 05/15/2025 Food and Beverage No dispute reported 06/30/2026 1225994566 CMS
Incyte Corporation $1,030.44 05/15/2025 Travel and Lodging No dispute reported 06/30/2026 1226043800 CMS
Lilly USA, LLC $121.17 05/14/2025 Food and Beverage No dispute reported 06/30/2026 1186818804 CMS
E.R. Squibb & Sons, L.L.C. $3,820.00 05/12/2025 Consulting Fee No dispute reported 06/30/2026 1184625463 CMS
ABBVIE INC. $59.21 05/08/2025 Food and Beverage No dispute reported 06/30/2026 1201852332 CMS
ABBVIE INC. $792.51 05/08/2025 Travel and Lodging No dispute reported 06/30/2026 1201852334 CMS
ABBVIE INC. $5,600.00 05/05/2025 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 06/30/2026 1201852330 CMS
Incyte Corporation $125.13 05/01/2025 Food and Beverage No dispute reported 06/30/2026 1226043798 CMS
Incyte Corporation $801.45 05/01/2025 Travel and Lodging No dispute reported 06/30/2026 1226043806 CMS
ADC THERAPEUTICS AMERICA, INC. $1,236.22 04/29/2025 Travel and Lodging No dispute reported 06/30/2026 1246111317 CMS
ADC THERAPEUTICS AMERICA, INC. $5,840.00 04/29/2025 Honoraria No dispute reported 06/30/2026 1246115069 CMS
ABBVIE INC. $5,600.00 04/25/2025 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 06/30/2026 1201852328 CMS
ADC THERAPEUTICS AMERICA, INC. $119.70 04/25/2025 Food and Beverage No dispute reported 06/30/2026 1246126982 CMS
ABBVIE INC. $7.00 04/22/2025 Food and Beverage No dispute reported 06/30/2026 1201852326 CMS
ABBVIE INC. $93.34 04/21/2025 Food and Beverage No dispute reported 06/30/2026 1201852324 CMS
ABBVIE INC. $1,017.61 04/17/2025 Travel and Lodging No dispute reported 06/30/2026 1201852322 CMS
BeOne Medicines USA, Inc. $2,400.00 04/15/2025 Consulting Fee No dispute reported 06/30/2026 1202904386 CMS
ABBVIE INC. $34.37 04/08/2025 Food and Beverage No dispute reported 06/30/2026 1201852320 CMS
Incyte Corporation $342.50 04/07/2025 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 06/30/2026 1226043796 CMS
ABBVIE INC. $1,939.30 04/03/2025 Travel and Lodging No dispute reported 06/30/2026 1201852316 CMS
ABBVIE INC. $66.75 04/03/2025 Food and Beverage No dispute reported 06/30/2026 1201852318 CMS
ABBVIE INC. $600.00 03/25/2025 Consulting Fee No dispute reported 06/30/2026 1201852314 CMS
E.R. Squibb & Sons, L.L.C. $13.05 03/25/2025 Food and Beverage No dispute reported 06/30/2026 1184625386 CMS
ABBVIE INC. $4,000.00 03/21/2025 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 06/30/2026 1201852312 CMS
BeOne Medicines USA, Inc. $1,500.00 03/21/2025 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 06/30/2026 1202904394 CMS
GENZYME CORPORATION $125.25 03/13/2025 Food and Beverage No dispute reported 06/30/2026 1233405248 CMS
GENZYME CORPORATION $8,726.00 03/13/2025 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 06/30/2026 1233405250 CMS
GENZYME CORPORATION $712.64 03/13/2025 Travel and Lodging No dispute reported 06/30/2026 1233405252 CMS
ABBVIE INC. $6.22 03/06/2025 Food and Beverage No dispute reported 06/30/2026 1201852310 CMS
Novartis Pharmaceuticals Corporation $15.78 03/06/2025 Food and Beverage No dispute reported 06/30/2026 1200281934 CMS
Genmab U.S., Inc. $2,400.00 03/04/2025 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 06/30/2026 1235922444 CMS
ABBVIE INC. $105.82 02/27/2025 Food and Beverage No dispute reported 06/30/2026 1201852308 CMS
Incyte Corporation $2,050.00 02/25/2025 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 06/30/2026 1226106385 CMS
GENZYME CORPORATION $1,870.00 02/13/2025 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 06/30/2026 1233405236 CMS
Ipsen Biopharmaceuticals, Inc $4,410.00 02/05/2025 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 06/30/2026 1208834542 CMS
ABBVIE INC. $2,800.00 01/30/2025 Consulting Fee No dispute reported 06/30/2026 1201852306 CMS
Celgene Corporation $20.21 01/30/2025 Food and Beverage No dispute reported 06/30/2026 1184625323 CMS
Geron Corporation $24.26 01/13/2025 Food and Beverage No dispute reported 06/30/2026 1238888470 CMS
ABBVIE INC. $5.69 01/08/2025 Food and Beverage No dispute reported 06/30/2026 1201852304 CMS

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
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.

Cite this record.

Plain
MARK JOSEPH FESLER, NPI 1235204066. IndustryPayments, data edition 2026-07-26T04:22:22Z. https://industrypayments.org/provider/npi-1235204066.
APA 7
IndustryPayments. (2026). MARK JOSEPH FESLER, NPI 1235204066 (Data edition 2026-07-26T04:22:22Z) [Data set]. https://industrypayments.org/provider/npi-1235204066
Bluebook
MARK JOSEPH FESLER, NPI 1235204066, IndustryPayments (data edition 2026-07-26T04:22:22Z), https://industrypayments.org/provider/npi-1235204066.

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