IndustryPayments

STUART SPRAGUE

Allopathic & Osteopathic Physicians|Internal Medicine|Nephrology EVANSTON, IL NPI 1114947124

Browse related groups: Allopathic & Osteopathic Physicians|Internal Medicine|Nephrology IL Ardelyx, Inc. All categories

General Payments — all program years on this page

$364,556.64

  • Category: General Payments
  • Program years: PY2018–2024
  • Record count: 484
  • As of (CMS publication): 2026-01-23

Latest program year (PY2024): $50,090.33 across 92 records · disputed records: 0

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

How this figure is 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

Latest program year (PY2024) · sorted by reported total.

Nature of paymentAmountRecords
Consulting Fee $25,186.0015
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program $20,070.008
Travel and Lodging $2,218.4416
Food and Beverage $2,115.8952
Honoraria $500.001

By paying entity

Latest program year (PY2024) · sorted by reported total.

Paying entityAmountRecords
Ardelyx, Inc. $30,626.7531
Kyowa Kirin, Inc. $17,073.1026
Bayer HealthCare Pharmaceuticals Inc. $560.452
Fresenius USA Marketing, Inc. $500.001
OPKO Pharmaceuticals, LLC $480.001
NOVARTIS PHARMACEUTICALS CORPORATION $200.225
Amgen Inc. $192.816
Acerta Pharma LLC $104.694
CALLIDITAS THERAPEUTICS US INC. $83.484
Mallinckrodt Hospital Products Inc. $49.942
Retrophin, Inc. $41.273
Otsuka America Pharmaceutical, Inc. $40.932
Relypsa, Inc. $34.721
Alexion Pharmaceuticals, Inc. $28.431
ANI Pharmaceuticals, Inc. $27.741
Alvogen Inc $23.861
Recor Medical Inc $21.941

By program year

Program yearAmountRecords
2018 $51,814.8567
2019 $68,083.1988
2020 $16,767.7121
2021 $44,430.2863
2022 $118,589.90106
2023 $14,780.3847
2024 $50,090.3392

Records — PY2024 (92)

Record IDPaying entityAmountDate Nature of paymentDispute statusPublishedSource
1086174250 Bayer Healthcare Pharmaceuticals Inc. $24.45 10/29/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1086260732 Bayer Healthcare Pharmaceuticals Inc. $536.00 01/22/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1087321059 Novartis Pharmaceuticals Corporation $26.05 02/28/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1087321067 Novartis Pharmaceuticals Corporation $25.39 09/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1087321071 Novartis Pharmaceuticals Corporation $1.45 09/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1087321077 Novartis Pharmaceuticals Corporation $118.74 10/09/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1087321083 Novartis Pharmaceuticals Corporation $28.59 12/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1091155680 ANI Pharmaceuticals, Inc. $27.74 09/04/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1093915008 Alexion Pharmaceuticals, Inc. $28.43 07/04/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1104357061 AstraZeneca Pharmaceuticals LP $31.69 04/17/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1104378757 AstraZeneca Pharmaceuticals LP $13.43 02/07/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1104628694 AstraZeneca Pharmaceuticals LP $25.93 12/04/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1105791586 AstraZeneca Pharmaceuticals LP $33.64 08/07/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1112850072 OPKO Pharmaceuticals, LLC $480.00 11/05/2024 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 View at CMS
1116146398 Amgen Inc. $12.93 04/09/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1116146406 Amgen Inc. $22.21 01/09/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1117691084 Amgen Inc. $21.41 01/18/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1117691086 Amgen Inc. $23.23 08/13/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1117691088 Amgen Inc. $84.66 09/11/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1117691090 Amgen Inc. $28.37 11/19/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1118987274 Otsuka America Pharmaceutical, Inc. $17.79 01/30/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1118987276 Otsuka America Pharmaceutical, Inc. $23.14 05/14/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1124040440 Vifor Pharma, Inc. $34.72 06/04/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043879 Kyowa Kirin, Inc. $2,125.00 02/09/2024 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 View at CMS
1127043881 Kyowa Kirin, Inc. $18.76 02/09/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043883 Kyowa Kirin, Inc. $111.56 01/31/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043885 Kyowa Kirin, Inc. $34.37 04/06/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043887 Kyowa Kirin, Inc. $19.65 03/19/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043889 Kyowa Kirin, Inc. $1,167.40 04/06/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043891 Kyowa Kirin, Inc. $208.27 04/06/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043893 Kyowa Kirin, Inc. $3.00 04/05/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043895 Kyowa Kirin, Inc. $157.66 04/05/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043897 Kyowa Kirin, Inc. $93.53 04/06/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043899 Kyowa Kirin, Inc. $113.57 04/06/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043901 Kyowa Kirin, Inc. $10.69 04/06/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043903 Kyowa Kirin, Inc. $10.69 04/06/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043905 Kyowa Kirin, Inc. $159.75 04/06/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043907 Kyowa Kirin, Inc. $25.00 04/05/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043909 Kyowa Kirin, Inc. $84.00 04/05/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043911 Kyowa Kirin, Inc. $10.05 04/05/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043913 Kyowa Kirin, Inc. $10.05 04/07/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043915 Kyowa Kirin, Inc. $7,650.00 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 View at CMS
1127043917 Kyowa Kirin, Inc. $1,065.00 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 View at CMS
1127043919 Kyowa Kirin, Inc. $20.10 08/21/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1127043921 Kyowa Kirin, Inc. $50.00 08/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043923 Kyowa Kirin, Inc. $50.00 08/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043925 Kyowa Kirin, Inc. $25.00 08/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043927 Kyowa Kirin, Inc. $25.00 08/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1127043929 Kyowa Kirin, Inc. $3,825.00 08/21/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1127687697 Recor Medical Inc $21.94 10/01/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1137625810 Alvogen Inc $23.86 06/10/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1141509111 CALLIDITAS THERAPEUTICS US INC. $21.17 02/01/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1141510619 CALLIDITAS THERAPEUTICS US INC. $24.01 03/01/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1141518191 CALLIDITAS THERAPEUTICS US INC. $20.91 07/09/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1141526404 CALLIDITAS THERAPEUTICS US INC. $17.39 11/05/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1145141235 Mallinckrodt Hospital Products Inc. $24.94 05/08/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1145141240 Mallinckrodt Hospital Products Inc. $25.00 10/16/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709240 Ardelyx, Inc. $4,200.00 01/24/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709242 Ardelyx, Inc. $1,050.00 02/08/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709244 Ardelyx, Inc. $1,050.00 02/21/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709246 Ardelyx, Inc. $1,050.00 03/14/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709248 Ardelyx, Inc. $875.00 04/16/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709250 Ardelyx, Inc. $875.00 06/18/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709252 Ardelyx, Inc. $875.00 07/10/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709254 Ardelyx, Inc. $875.00 08/06/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709256 Ardelyx, Inc. $283.86 09/18/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1146709258 Ardelyx, Inc. $124.99 09/18/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709260 Ardelyx, Inc. $1,400.00 09/18/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709262 Ardelyx, Inc. $35.00 09/19/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709264 Ardelyx, Inc. $35.39 09/19/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709266 Ardelyx, Inc. $35.39 09/19/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709268 Ardelyx, Inc. $50.00 09/19/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709270 Ardelyx, Inc. $2,800.00 09/19/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709272 Ardelyx, Inc. $68.12 09/19/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1146709274 Ardelyx, Inc. $875.00 09/25/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709276 Ardelyx, Inc. $2,450.00 09/27/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1146709278 Ardelyx, Inc. $48.24 09/27/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1146709280 Ardelyx, Inc. $105.00 11/06/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709282 Ardelyx, Inc. $28.76 11/06/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1146709284 Ardelyx, Inc. $2,450.00 11/06/2024 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 View at CMS
1146709286 Ardelyx, Inc. $33.50 11/08/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709288 Ardelyx, Inc. $29.48 11/08/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1146709290 Ardelyx, Inc. $2,450.00 11/08/2024 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 View at CMS
1146709292 Ardelyx, Inc. $1,400.00 11/12/2024 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 View at CMS
1146709294 Ardelyx, Inc. $120.42 11/20/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1146709296 Ardelyx, Inc. $53.60 11/20/2024 Travel and Lodging Undisputed 01/23/2026 View at CMS
1146709298 Ardelyx, Inc. $2,450.00 11/20/2024 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 View at CMS
1146709300 Ardelyx, Inc. $2,450.00 12/20/2024 Consulting Fee Undisputed 01/23/2026 View at CMS
1149919114 Travere Therapeutics, Inc. $9.71 02/13/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1149919118 Travere Therapeutics, Inc. $11.50 02/13/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1149919122 Travere Therapeutics, Inc. $20.06 09/26/2024 Food and Beverage Undisputed 01/23/2026 View at CMS
1154199465 Fresenius USA Marketing, Inc. $500.00 08/13/2024 Honoraria Undisputed 01/23/2026 View at CMS

Provenance & corrections

  • Dataset: CMS Open Payments — General Payments
  • Source: CMS Open Payments dataset (bulk file)
  • Publisher of source data: Centers for Medicare & Medicaid Services
  • 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.