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

KEITH A DUFENDACH

Allopathic & Osteopathic Physicians Thoracic Surgery (Cardiothoracic Vascular Surgery)

NPI
1821525429
CMS profile
11429325
Location
MUSKEGON, MI

General Payments · PY2022–2024

$3,550.59

  • Reported across 47 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,074.09

13 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

Nature of paymentAmountRecords
Food and Beverage $966.40 12
Education $107.69 1

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2022 $255.90 2
PY2023 $2,220.60 32
PY2024 $1,074.09 13

Payment records · PY2024 (13)

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

Program year 2024 20222023 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
Abbott Laboratories $24.17 07/09/2024 Food and Beverage Undisputed 01/23/2026 1122122932 CMS
Abbott Laboratories $24.16 11/19/2024 Food and Beverage Undisputed 01/23/2026 1122126044 CMS
Abbott Laboratories $68.02 12/04/2024 Food and Beverage Undisputed 01/23/2026 1122127704 CMS
Abbott Laboratories $129.54 12/04/2024 Food and Beverage Undisputed 01/23/2026 1122127720 CMS
Abbott Laboratories $24.95 12/30/2024 Food and Beverage Undisputed 01/23/2026 1122127920 CMS
ABIOMED $165.65 02/15/2024 Food and Beverage Undisputed 01/23/2026 1142267514 CMS
ATRICURE, INC. $146.31 01/05/2024 Food and Beverage Undisputed 01/23/2026 1132881808 CMS
Edwards Lifesciences Corporation $172.06 04/28/2024 Food and Beverage Undisputed 01/23/2026 1138875525 CMS
Edwards Lifesciences Corporation $152.40 11/19/2024 Food and Beverage Undisputed 01/23/2026 1138875555 CMS
Ethicon US, LLC $21.20 02/21/2024 Food and Beverage Undisputed 01/23/2026 1077644386 CMS
Medical Device Business Services, Inc. $107.69 09/14/2024 Education Undisputed 01/23/2026 1077822972 CMS
Mid-Atlantic Surgical Systems, LLC $23.42 07/10/2024 Food and Beverage Undisputed 01/23/2026 1126611470 CMS
Mid-Atlantic Surgical Systems, LLC $14.52 07/11/2024 Food and Beverage Undisputed 01/23/2026 1126611468 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
2022, 2023, 2024
Source files
Dataset page · Bulk file · 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.