IndustryPayments
Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · as published 2026-06-30 View official record Methodology

Covered recipient · General Payments record

DONALD M KNAPKE

Allopathic & Osteopathic Physicians Orthopaedic Surgery

NPI
1366432569
CMS profile
288747
Location
TROY, MI

General Payments · PY2019–2025

$496,078.86

  • Reported across 350 records
  • CMS publication 2026-06-30

Latest program year · PY2025

$54,972.29

54 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.

Related groups: Orthopaedic Surgery MI All categories

By nature of payment

PY2025 · sorted by reported total

Nature of paymentAmountRecords
Consulting Fee $27,240.00 9
Royalty or License $12,031.10 4
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program $8,900.00 5
Travel and Lodging $4,752.24 12
Food and Beverage $2,048.95 24

By paying entity

PY2025 · sorted by reported total

Paying entityAmountRecords
MicroPort Orthopedics Inc $36,252.66 30
Smith+Nephew, Inc. $15,337.66 16
Medical Device Business Services, Inc. $2,940.00 1
MEDACTA USA, INC. $121.26 1
Stryker Corporation $112.19 1
Medtronic, Inc. $91.10 1
Zimmer Biomet Holdings, Inc. $50.91 1
DAVOL INC. $26.08 1
DePuy Synthes Sales Inc. $22.09 1
Linvatec Corporation $18.34 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2019 $79,473.45 112
PY2020 $84,816.65 49
PY2021 $51,327.01 21
PY2022 $57,641.78 18
PY2023 $74,514.10 38
PY2024 $93,333.58 58
PY2025 $54,972.29 54

Payment records · PY2025 (54)

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

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
Davol Inc. $26.08 02/17/2025 Food and Beverage Undisputed 06/30/2026 1232211386 CMS
DePuy Synthes Sales Inc. $22.09 06/17/2025 Food and Beverage Undisputed 06/30/2026 1174142175 CMS
Linvatec Corporation $18.34 07/23/2025 Food and Beverage Undisputed 06/30/2026 1208719135 CMS
Medacta USA, Inc. $121.26 02/19/2025 Food and Beverage Undisputed 06/30/2026 1242106887 CMS
Medical Device Business Services, Inc. $2,940.00 07/07/2025 Consulting Fee Undisputed 06/30/2026 1174035701 CMS
Medtronic, Inc. $91.10 04/09/2025 Food and Beverage Undisputed 06/30/2026 1218849141 CMS
MicroPort Orthopedics Inc $2,000.00 01/08/2025 Consulting Fee Undisputed 06/30/2026 1182089253 CMS
MicroPort Orthopedics Inc $2,800.00 01/08/2025 Consulting Fee Undisputed 06/30/2026 1182089257 CMS
MicroPort Orthopedics Inc $887.98 01/27/2025 Travel and Lodging Undisputed 06/30/2026 1182089247 CMS
MicroPort Orthopedics Inc $3,100.93 02/13/2025 Royalty or License Undisputed 06/30/2026 1182089263 CMS
MicroPort Orthopedics Inc $800.00 02/26/2025 Consulting Fee Undisputed 06/30/2026 1182089241 CMS
MicroPort Orthopedics Inc $269.18 03/14/2025 Travel and Lodging Undisputed 06/30/2026 1182089235 CMS
MicroPort Orthopedics Inc $11.40 03/15/2025 Food and Beverage Undisputed 06/30/2026 1182089211 CMS
MicroPort Orthopedics Inc $48.54 03/15/2025 Food and Beverage Undisputed 06/30/2026 1182089219 CMS
MicroPort Orthopedics Inc $74.08 03/15/2025 Food and Beverage Undisputed 06/30/2026 1182089221 CMS
MicroPort Orthopedics Inc $88.31 03/15/2025 Travel and Lodging Undisputed 06/30/2026 1182089223 CMS
MicroPort Orthopedics Inc $200.00 04/02/2025 Consulting Fee Undisputed 06/30/2026 1182089233 CMS
MicroPort Orthopedics Inc $116.21 04/22/2025 Food and Beverage Undisputed 06/30/2026 1182089225 CMS
MicroPort Orthopedics Inc $3,157.01 05/12/2025 Royalty or License Undisputed 06/30/2026 1182089265 CMS
MicroPort Orthopedics Inc $3,000.00 05/28/2025 Consulting Fee Undisputed 06/30/2026 1182089259 CMS
MicroPort Orthopedics Inc $3,200.00 05/28/2025 Consulting Fee Undisputed 06/30/2026 1182089267 CMS
MicroPort Orthopedics Inc $613.97 07/02/2025 Travel and Lodging Undisputed 06/30/2026 1182089239 CMS
MicroPort Orthopedics Inc $120.00 07/25/2025 Travel and Lodging Undisputed 06/30/2026 1182089227 CMS
MicroPort Orthopedics Inc $171.84 07/25/2025 Food and Beverage Undisputed 06/30/2026 1182089229 CMS
MicroPort Orthopedics Inc $184.14 07/25/2025 Travel and Lodging Undisputed 06/30/2026 1182089231 CMS
MicroPort Orthopedics Inc $42.67 07/26/2025 Food and Beverage Undisputed 06/30/2026 1182089213 CMS
MicroPort Orthopedics Inc $45.67 07/26/2025 Food and Beverage Undisputed 06/30/2026 1182089215 CMS
MicroPort Orthopedics Inc $47.57 07/26/2025 Food and Beverage Undisputed 06/30/2026 1182089217 CMS
MicroPort Orthopedics Inc $1,200.00 08/06/2025 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 06/30/2026 1182089249 CMS
MicroPort Orthopedics Inc $3,059.96 08/12/2025 Royalty or License Undisputed 06/30/2026 1182089261 CMS
MicroPort Orthopedics Inc $800.00 11/05/2025 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 06/30/2026 1182089243 CMS
MicroPort Orthopedics Inc $800.00 11/05/2025 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 06/30/2026 1182089245 CMS
MicroPort Orthopedics Inc $1,600.00 11/05/2025 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 06/30/2026 1182089251 CMS
MicroPort Orthopedics Inc $4,500.00 11/05/2025 Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program Undisputed 06/30/2026 1182089269 CMS
MicroPort Orthopedics Inc $2,713.20 11/12/2025 Royalty or License Undisputed 06/30/2026 1182089255 CMS
MicroPort Orthopedics Inc $600.00 11/26/2025 Consulting Fee Undisputed 06/30/2026 1182089237 CMS
Smith+Nephew, Inc. $128.90 01/30/2025 Food and Beverage Undisputed 06/30/2026 1242198393 CMS
Smith+Nephew, Inc. $51.83 03/06/2025 Food and Beverage Undisputed 06/30/2026 1242198395 CMS
Smith+Nephew, Inc. $38.59 03/06/2025 Food and Beverage Undisputed 06/30/2026 1242198397 CMS
Smith+Nephew, Inc. $523.30 04/23/2025 Travel and Lodging Undisputed 06/30/2026 1242198399 CMS
Smith+Nephew, Inc. $826.14 04/23/2025 Travel and Lodging Undisputed 06/30/2026 1242198409 CMS
Smith+Nephew, Inc. $69.49 04/23/2025 Travel and Lodging Undisputed 06/30/2026 1242198411 CMS
Smith+Nephew, Inc. $163.48 04/24/2025 Food and Beverage Undisputed 06/30/2026 1242198405 CMS
Smith+Nephew, Inc. $140.00 04/25/2025 Food and Beverage Undisputed 06/30/2026 1242198407 CMS
Smith+Nephew, Inc. $352.41 09/04/2025 Travel and Lodging Undisputed 06/30/2026 1242198403 CMS
Smith+Nephew, Inc. $499.32 09/04/2025 Travel and Lodging Undisputed 06/30/2026 1242198413 CMS
Smith+Nephew, Inc. $318.00 09/04/2025 Travel and Lodging Undisputed 06/30/2026 1242198415 CMS
Smith+Nephew, Inc. $148.23 09/04/2025 Food and Beverage Undisputed 06/30/2026 1242198417 CMS
Smith+Nephew, Inc. $144.40 09/05/2025 Food and Beverage Undisputed 06/30/2026 1242198419 CMS
Smith+Nephew, Inc. $108.90 09/05/2025 Food and Beverage Undisputed 06/30/2026 1242198421 CMS
Smith+Nephew, Inc. $124.67 09/06/2025 Food and Beverage Undisputed 06/30/2026 1242198423 CMS
Smith+Nephew, Inc. $11,700.00 09/24/2025 Consulting Fee Undisputed 06/30/2026 1242198401 CMS
Stryker Corporation $112.19 01/07/2025 Food and Beverage Undisputed 06/30/2026 1227669422 CMS
Zimmer Biomet Holdings, Inc. $50.91 11/26/2025 Food and Beverage Undisputed 06/30/2026 1246897368 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.