Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · as published 2026-01-23 View official record Methodology

Covered recipient · General Payments record

MARK JOSEPH FESLER

Allopathic & Osteopathic Physicians Internal Medicine Hematology & Oncology

NPI
1235204066
CMS profile
328476
Location
SAINT LOUIS, MO

General Payments · PY2018–2024

$692,851.60

  • Reported across 503 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$192,797.48

134 records · 0 disputed

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

How these totals are calculated
  • The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. 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 (all years).
  • Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2024 · sorted by reported total

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $18,269.95 20
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

Payment records · PY2024 (134)

Sorted by paying entity, then date · as published by CMS

Program year 2024 201820192020202120222023 Record-level detail is published for PY2024; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
ABBVIE INC. $5.14 01/06/2024 Food and Beverage Undisputed 01/23/2026 1103724988 CMS
ABBVIE INC. $450.00 02/08/2024 Consulting Fee Undisputed 01/23/2026 1103134273 CMS
ABBVIE INC. $7.07 02/10/2024 Food and Beverage Undisputed 01/23/2026 1103724990 CMS
ABBVIE INC. $65.66 02/24/2024 Food and Beverage Undisputed 01/23/2026 1103724992 CMS
ABBVIE INC. $1,372.50 02/24/2024 Travel and Lodging Undisputed 01/23/2026 1104185236 CMS
ABBVIE INC. $8.75 03/15/2024 Food and Beverage Undisputed 01/23/2026 1103724994 CMS
ABBVIE INC. $124.97 03/20/2024 Food and Beverage Undisputed 01/23/2026 1103724996 CMS
ABBVIE INC. $1,200.00 03/22/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150125 CMS
ABBVIE INC. $5,600.00 04/01/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150127 CMS
ABBVIE INC. $4,000.00 04/05/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150129 CMS
ABBVIE INC. $2,400.00 04/05/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150131 CMS
ABBVIE INC. $7.84 04/17/2024 Food and Beverage Undisputed 01/23/2026 1103724998 CMS
ABBVIE INC. $108.64 04/18/2024 Food and Beverage Undisputed 01/23/2026 1103725000 CMS
ABBVIE INC. $845.50 04/18/2024 Travel and Lodging Undisputed 01/23/2026 1104185238 CMS
ABBVIE INC. $121.39 05/01/2024 Food and Beverage Undisputed 01/23/2026 1103725002 CMS
ABBVIE INC. $5,600.00 05/10/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150133 CMS
ABBVIE INC. $4,000.00 05/17/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150135 CMS
ABBVIE INC. $113.36 06/27/2024 Food and Beverage Undisputed 01/23/2026 1103725004 CMS
ABBVIE INC. $1,466.25 06/27/2024 Travel and Lodging Undisputed 01/23/2026 1104185240 CMS
ABBVIE INC. $4.36 07/03/2024 Food and Beverage Undisputed 01/23/2026 1103725006 CMS
ABBVIE INC. $5,600.00 07/26/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150137 CMS
ABBVIE INC. $6.97 08/13/2024 Food and Beverage Undisputed 01/23/2026 1103725008 CMS
ABBVIE INC. $7.84 09/18/2024 Food and Beverage Undisputed 01/23/2026 1103725010 CMS
ABBVIE INC. $23.82 10/10/2024 Food and Beverage Undisputed 01/23/2026 1103725012 CMS
ABBVIE INC. $110.10 11/07/2024 Food and Beverage Undisputed 01/23/2026 1103725014 CMS
ABBVIE INC. $1,643.74 11/07/2024 Travel and Lodging Undisputed 01/23/2026 1104185242 CMS
ABBVIE INC. $5,600.00 12/03/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1103150139 CMS
ABBVIE INC. $6.81 12/13/2024 Food and Beverage Undisputed 01/23/2026 1103725016 CMS
ADC Therapeutics America, Inc. $5.08 01/19/2024 Food and Beverage Undisputed 01/23/2026 1121191929 CMS
ADC Therapeutics America, Inc. $730.00 02/06/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1121191943 CMS
ADC Therapeutics America, Inc. $121.17 03/05/2024 Food and Beverage Undisputed 01/23/2026 1121191959 CMS
ADC Therapeutics America, Inc. $3,650.00 03/05/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1121191961 CMS
ADC Therapeutics America, Inc. $7.50 04/05/2024 Food and Beverage Undisputed 01/23/2026 1121191965 CMS
AstraZeneca Pharmaceuticals LP $2,397.50 08/22/2024 Consulting Fee Undisputed 01/23/2026 1104279989 CMS
BeiGene USA, Inc. $1,875.00 02/14/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1120848275 CMS
BeiGene USA, Inc. $1,875.00 10/29/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1120848267 CMS
BeiGene USA, Inc. $375.00 12/10/2024 Consulting Fee Undisputed 01/23/2026 1120848271 CMS
BeiGene USA, Inc. $2,250.00 12/10/2024 Consulting Fee Undisputed 01/23/2026 1120848273 CMS
BeiGene USA, Inc. $1,875.00 12/23/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1120848269 CMS
Celgene Corporation $15.07 01/11/2024 Food and Beverage Undisputed 01/23/2026 1101149725 CMS
Celgene Corporation $21.85 08/22/2024 Food and Beverage Undisputed 01/23/2026 1101149747 CMS
Celgene Corporation $19.64 09/20/2024 Food and Beverage Undisputed 01/23/2026 1101149751 CMS
Celgene Corporation $19.69 10/24/2024 Food and Beverage Undisputed 01/23/2026 1101149753 CMS
Daiichi Sankyo Inc. $19.81 01/30/2024 Food and Beverage Undisputed 01/23/2026 1089421214 CMS
Daiichi Sankyo Inc. $18.23 05/09/2024 Food and Beverage Undisputed 01/23/2026 1089421216 CMS
E.R. Squibb & Sons, L.L.C. $2,768.00 05/24/2024 Consulting Fee Undisputed 01/23/2026 1101517432 CMS
Fennec Pharmaceuticals, Inc. $8.19 01/15/2024 Food and Beverage Undisputed 01/23/2026 1120185438 CMS
Fennec Pharmaceuticals, Inc. $11.85 03/01/2024 Food and Beverage Undisputed 01/23/2026 1120185436 CMS
Genentech USA, Inc. $24.99 03/17/2024 Food and Beverage Undisputed 01/23/2026 1133062256 CMS
Genentech USA, Inc. $88.91 04/10/2024 Food and Beverage Undisputed 01/23/2026 1133062261 CMS
Genentech USA, Inc. $973.69 04/10/2024 Travel and Lodging Undisputed 01/23/2026 1133062265 CMS
Genentech USA, Inc. $5,000.00 04/10/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1133062269 CMS
Genentech USA, Inc. $204.06 04/13/2024 Travel and Lodging Undisputed 01/23/2026 1133062273 CMS
Genentech USA, Inc. $56.68 04/13/2024 Food and Beverage Undisputed 01/23/2026 1133062277 CMS
Genentech USA, Inc. $5,000.00 04/13/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1133062281 CMS
Genentech USA, Inc. $442.92 04/13/2024 Travel and Lodging Undisputed 01/23/2026 1133062285 CMS
Genentech USA, Inc. $62.95 04/13/2024 Travel and Lodging Undisputed 01/23/2026 1133062289 CMS
Genentech USA, Inc. $656.62 06/06/2024 Travel and Lodging Undisputed 01/23/2026 1133062293 CMS
Genentech USA, Inc. $5,000.00 06/06/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1133062297 CMS
Genentech USA, Inc. $69.33 06/06/2024 Food and Beverage Undisputed 01/23/2026 1133062301 CMS
Genentech USA, Inc. $3,130.00 07/17/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1133062305 CMS
Genentech USA, Inc. $107.70 07/17/2024 Food and Beverage Undisputed 01/23/2026 1133062309 CMS
Genmab U.S., Inc. $1,350.00 01/19/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1126829410 CMS
Genmab U.S., Inc. $111.52 01/27/2024 Food and Beverage Undisputed 01/23/2026 1126829414 CMS
Genmab U.S., Inc. $1,221.54 01/30/2024 Travel and Lodging Undisputed 01/23/2026 1126829416 CMS
Genmab U.S., Inc. $1,050.00 01/31/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1126829412 CMS
Genmab U.S., Inc. $5,600.00 02/20/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1126829418 CMS
Genmab U.S., Inc. $2,400.00 05/03/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1126829422 CMS
Genmab U.S., Inc. $599.11 05/11/2024 Travel and Lodging Undisputed 01/23/2026 1126829420 CMS
Genmab U.S., Inc. $21.97 05/11/2024 Food and Beverage Undisputed 01/23/2026 1126829424 CMS
Genmab U.S., Inc. $5,600.00 05/13/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1126829426 CMS
Genmab U.S., Inc. $650.00 08/23/2024 Consulting Fee Undisputed 01/23/2026 1151759365 CMS
Genmab U.S., Inc. $4,000.00 10/16/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1126829428 CMS
Genmab U.S., Inc. $115.48 10/18/2024 Food and Beverage Undisputed 01/23/2026 1126829430 CMS
GENZYME CORPORATION $93.24 02/13/2024 Food and Beverage Undisputed 01/23/2026 1139760820 CMS
GENZYME CORPORATION $8,726.00 02/13/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1139760822 CMS
GENZYME CORPORATION $751.40 02/13/2024 Travel and Lodging Undisputed 01/23/2026 1139760824 CMS
GENZYME CORPORATION $2,909.00 05/06/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1139760842 CMS
GENZYME CORPORATION $125.00 05/16/2024 Food and Beverage Undisputed 01/23/2026 1139760834 CMS
GENZYME CORPORATION $8,726.00 05/16/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1139760836 CMS
GENZYME CORPORATION $1,662.00 06/20/2024 Consulting Fee Undisputed 01/23/2026 1139760796 CMS
GENZYME CORPORATION $831.00 10/09/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1139760878 CMS
GENZYME CORPORATION $4,571.00 10/24/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1139760876 CMS
GENZYME CORPORATION $121.81 10/24/2024 Food and Beverage Undisputed 01/23/2026 1139760880 CMS
GENZYME CORPORATION $103.66 11/14/2024 Food and Beverage Undisputed 01/23/2026 1139760870 CMS
GENZYME CORPORATION $7,064.00 11/14/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1139760872 CMS
GENZYME CORPORATION $579.02 11/14/2024 Travel and Lodging Undisputed 01/23/2026 1139760874 CMS
Gilead Sciences, Inc. $21.28 06/03/2024 Food and Beverage Undisputed 01/23/2026 1133801070 CMS
Incyte Corporation $124.97 03/21/2024 Food and Beverage Undisputed 01/23/2026 1141191421 CMS
Incyte Corporation $2,740.00 03/26/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141267291 CMS
Incyte Corporation $117.06 04/04/2024 Food and Beverage Undisputed 01/23/2026 1141181962 CMS
Incyte Corporation $708.49 04/04/2024 Travel and Lodging Undisputed 01/23/2026 1141198845 CMS
Incyte Corporation $4,110.00 04/09/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141197099 CMS
Incyte Corporation $342.50 05/01/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141317079 CMS
Incyte Corporation $12.91 05/09/2024 Food and Beverage Undisputed 01/23/2026 1141197105 CMS
Incyte Corporation $1,030.05 05/09/2024 Travel and Lodging Undisputed 01/23/2026 1141243880 CMS
Incyte Corporation $4,110.00 05/14/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141191463 CMS
Incyte Corporation $2,055.00 06/06/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141195393 CMS
Incyte Corporation $20.43 06/07/2024 Food and Beverage Undisputed 01/23/2026 1141275194 CMS
Incyte Corporation $129.50 06/13/2024 Food and Beverage Undisputed 01/23/2026 1141191535 CMS
Incyte Corporation $817.49 06/13/2024 Travel and Lodging Undisputed 01/23/2026 1141199381 CMS
Incyte Corporation $4,110.00 06/17/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141267317 CMS
Incyte Corporation $2,055.00 06/24/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141196775 CMS
Incyte Corporation $119.79 08/08/2024 Food and Beverage Undisputed 01/23/2026 1141191675 CMS
Incyte Corporation $2,740.00 08/13/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141271770 CMS
Incyte Corporation $817.49 09/05/2024 Travel and Lodging Undisputed 01/23/2026 1141266837 CMS
Incyte Corporation $117.80 09/05/2024 Food and Beverage Undisputed 01/23/2026 1141272552 CMS
Incyte Corporation $4,110.00 09/11/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141272554 CMS
Incyte Corporation $763.00 09/19/2024 Travel and Lodging Undisputed 01/23/2026 1141249992 CMS
Incyte Corporation $60.71 09/19/2024 Food and Beverage Undisputed 01/23/2026 1141266971 CMS
Incyte Corporation $1,027.50 09/24/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141272980 CMS
Incyte Corporation $4,110.00 09/24/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1141320657 CMS
Janssen Biotech, Inc. $24.37 05/15/2024 Food and Beverage Undisputed 01/23/2026 1078792845 CMS
Janssen Biotech, Inc. $24.36 12/13/2024 Food and Beverage Undisputed 01/23/2026 1078792887 CMS
Lilly USA, LLC $1,406.25 01/26/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135178655 CMS
Lilly USA, LLC $1,689.68 08/01/2024 Travel and Lodging Undisputed 01/23/2026 1135153686 CMS
Lilly USA, LLC $20.06 08/01/2024 Food and Beverage Undisputed 01/23/2026 1135153688 CMS
Lilly USA, LLC $2,200.00 08/06/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135168246 CMS
Lilly USA, LLC $2,500.00 08/06/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135178657 CMS
Lilly USA, LLC $90.04 09/12/2024 Food and Beverage Undisputed 01/23/2026 1135194830 CMS
Lilly USA, LLC $2,500.00 09/16/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135118295 CMS
Lilly USA, LLC $950.00 09/16/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135178659 CMS
Lilly USA, LLC $100.00 10/10/2024 Food and Beverage Undisputed 01/23/2026 1135118299 CMS
Lilly USA, LLC $1,089.32 10/10/2024 Travel and Lodging Undisputed 01/23/2026 1135168244 CMS
Lilly USA, LLC $1,575.00 10/14/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135118297 CMS
Lilly USA, LLC $2,500.00 10/14/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135158377 CMS
Lilly USA, LLC $1,250.00 10/31/2024 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 01/23/2026 1135158379 CMS
Novartis Pharmaceuticals Corporation $20.08 04/11/2024 Food and Beverage Undisputed 01/23/2026 1086846685 CMS
Novartis Pharmaceuticals Corporation $18.02 08/02/2024 Food and Beverage Undisputed 01/23/2026 1086846691 CMS
Novartis Pharmaceuticals Corporation $25.24 09/17/2024 Food and Beverage Undisputed 01/23/2026 1086846693 CMS
Novartis Pharmaceuticals Corporation $19.01 12/03/2024 Food and Beverage Undisputed 01/23/2026 1086846697 CMS
PFIZER INC. $18.71 09/13/2024 Food and Beverage Undisputed 01/23/2026 1131904651 CMS
SERVIER PHARMACEUTICALS LLC $18.38 07/12/2024 Food and Beverage Undisputed 01/23/2026 1147261664 CMS
Takeda Pharmaceuticals U.S.A., Inc. $23.10 02/13/2024 Food and Beverage Undisputed 01/23/2026 1144957427 CMS

Source & provenance

Dataset
CMS Open Payments — General Payments
Publisher of source data
Centers for Medicare & Medicaid Services
CMS publication date
2026-01-23
Program years on this page
2018, 2019, 2020, 2021, 2022, 2023, 2024
Source files
Dataset page · Bulk file · PY2018 , PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024
Generated from
OP_DTL_GNRL_PGYR2024_P01232026_01102026.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.