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

THOMAS J CHANG

Podiatric Medicine & Surgery Service Providers Podiatrist Foot & Ankle Surgery

NPI
1841315736
CMS profile
174667
Location
SANTA ROSA, CA

General Payments · PY2018–2024

$2,412,052.59

  • Reported across 519 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$117,163.82

72 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

Paying entityAmountRecords
Paragon 28, Inc. $35,303.51 15
DePuy Synthes Products LLC $34,253.03 3
Bioventus LLC $18,737.73 15
OSSIO INC $17,319.78 2
Medical Device Business Services, Inc. $9,683.78 9
Stryker Corporation $538.84 6
DePuy Synthes Sales Inc. $394.71 8
Nevro Corp. $200.78 2
Alafair Biosciences, Inc. $177.25 2
MIMEDX Group, Inc. $145.20 2
Abbott Laboratories $119.97 1
Carbofix Orthopedics Inc $110.64 1
TriMed, Inc. $84.10 1
ConvaTec Inc. $30.50 2
EVOLUTION SURGICAL, INC $24.40 1
Smith & Nephew, Inc. $20.38 1
Electronic Waveform Lab, Inc. $19.22 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $404,745.14 100
PY2019 $464,014.37 99
PY2020 $422,327.37 46
PY2021 $471,124.27 68
PY2022 $326,335.67 73
PY2023 $206,341.95 61
PY2024 $117,163.82 72

Payment records · PY2024 (72)

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
Abbott Laboratories $119.97 04/16/2024 Food and Beverage Undisputed 01/23/2026 1125298877 CMS
Alafair Biosciences, Inc. $63.12 09/14/2024 Food and Beverage Undisputed 01/23/2026 1138674304 CMS
Alafair Biosciences, Inc. $114.13 09/23/2024 Food and Beverage Undisputed 01/23/2026 1138674536 CMS
Bioventus LLC $135.08 01/25/2024 Food and Beverage Undisputed 01/23/2026 1137438051 CMS
Bioventus LLC $130.95 02/20/2024 Food and Beverage Undisputed 01/23/2026 1137438053 CMS
Bioventus LLC $6.70 03/12/2024 Travel and Lodging Undisputed 01/23/2026 1137438055 CMS
Bioventus LLC $134.00 03/12/2024 Travel and Lodging Undisputed 01/23/2026 1137438057 CMS
Bioventus LLC $7,150.00 03/12/2024 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 1137438059 CMS
Bioventus LLC $74.34 06/18/2024 Travel and Lodging Undisputed 01/23/2026 1137438061 CMS
Bioventus LLC $72.00 06/18/2024 Travel and Lodging Undisputed 01/23/2026 1137438063 CMS
Bioventus LLC $9,350.00 06/18/2024 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 1137438065 CMS
Bioventus LLC $70.00 06/18/2024 Travel and Lodging Undisputed 01/23/2026 1137438067 CMS
Bioventus LLC $92.80 06/18/2024 Travel and Lodging Undisputed 01/23/2026 1137438069 CMS
Bioventus LLC $36.95 06/18/2024 Food and Beverage Undisputed 01/23/2026 1137438071 CMS
Bioventus LLC $628.56 06/18/2024 Travel and Lodging Undisputed 01/23/2026 1137438073 CMS
Bioventus LLC $6.58 08/28/2024 Food and Beverage Undisputed 01/23/2026 1137438075 CMS
Bioventus LLC $825.00 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 1137438077 CMS
Bioventus LLC $24.77 12/18/2024 Food and Beverage Undisputed 01/23/2026 1137438079 CMS
Carbofix Orthopedics Inc $110.64 09/17/2024 Food and Beverage Undisputed 01/23/2026 1154309144 CMS
ConvaTec Inc. $13.36 03/19/2024 Food and Beverage Undisputed 01/23/2026 1151371858 CMS
ConvaTec Inc. $17.14 05/15/2024 Food and Beverage Undisputed 01/23/2026 1151371860 CMS
DePuy Synthes Products, Inc. $17,038.81 02/05/2024 Royalty or License Undisputed 01/23/2026 1077796217 CMS
DePuy Synthes Products, Inc. $15,474.53 05/01/2024 Royalty or License Undisputed 01/23/2026 1077796213 CMS
DePuy Synthes Products, Inc. $1,739.69 07/31/2024 Royalty or License Undisputed 01/23/2026 1077796209 CMS
DePuy Synthes Sales Inc. $18.73 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077813489 CMS
DePuy Synthes Sales Inc. $21.91 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077813492 CMS
DePuy Synthes Sales Inc. $21.01 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077813510 CMS
DePuy Synthes Sales Inc. $14.42 01/20/2024 Travel and Lodging Undisputed 01/23/2026 1077813513 CMS
DePuy Synthes Sales Inc. $80.09 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077813517 CMS
DePuy Synthes Sales Inc. $11.91 01/20/2024 Travel and Lodging Undisputed 01/23/2026 1077813524 CMS
DePuy Synthes Sales Inc. $99.34 05/14/2024 Food and Beverage Undisputed 01/23/2026 1077813547 CMS
DePuy Synthes Sales Inc. $127.30 09/10/2024 Food and Beverage Undisputed 01/23/2026 1077813543 CMS
Electronic Waveform Lab, Inc. $19.22 11/05/2024 Food and Beverage Undisputed 01/23/2026 1089553443 CMS
Evolution Surgical, Inc $24.40 06/10/2024 Food and Beverage Undisputed 01/23/2026 1120714074 CMS
Medical Device Business Services, Inc. $678.17 01/19/2024 Travel and Lodging Undisputed 01/23/2026 1077760066 CMS
Medical Device Business Services, Inc. $319.70 01/19/2024 Travel and Lodging Undisputed 01/23/2026 1077760119 CMS
Medical Device Business Services, Inc. $98.83 01/19/2024 Food and Beverage Undisputed 01/23/2026 1077760139 CMS
Medical Device Business Services, Inc. $272.84 01/19/2024 Travel and Lodging Undisputed 01/23/2026 1077760166 CMS
Medical Device Business Services, Inc. $32.60 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077760080 CMS
Medical Device Business Services, Inc. $39.09 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077760127 CMS
Medical Device Business Services, Inc. $31.11 01/20/2024 Food and Beverage Undisputed 01/23/2026 1077760182 CMS
Medical Device Business Services, Inc. $8,006.15 02/28/2024 Consulting Fee Undisputed 01/23/2026 1077861912 CMS
Medical Device Business Services, Inc. $205.29 02/28/2024 Travel and Lodging Undisputed 01/23/2026 1077861916 CMS
MIMEDX Group, Inc. $121.80 04/03/2024 Food and Beverage Undisputed 01/23/2026 1140256663 CMS
MIMEDX Group, Inc. $23.40 04/04/2024 Food and Beverage Undisputed 01/23/2026 1140256665 CMS
Nevro Corp. $91.47 04/09/2024 Food and Beverage Undisputed 01/23/2026 1130770686 CMS
Nevro Corp. $109.31 11/06/2024 Food and Beverage Undisputed 01/23/2026 1130770688 CMS
OSSIO INC $145.17 04/29/2024 Food and Beverage Undisputed 01/23/2026 1146931861 CMS
OSSIO INC $17,174.61 04/29/2024 Consulting Fee Undisputed 01/23/2026 1146931887 CMS
Paragon 28, Inc. $327.34 02/02/2024 Food and Beverage Undisputed 01/23/2026 1138428302 CMS
Paragon 28, Inc. $20,100.00 02/14/2024 Consulting Fee Undisputed 01/23/2026 1138428367 CMS
Paragon 28, Inc. $225.39 02/28/2024 Royalty or License Undisputed 01/23/2026 1138428387 CMS
Paragon 28, Inc. $2,822.88 02/28/2024 Royalty or License Undisputed 01/23/2026 1138428389 CMS
Paragon 28, Inc. $932.21 04/02/2024 Travel and Lodging Undisputed 01/23/2026 1138428359 CMS
Paragon 28, Inc. $190.67 04/12/2024 Food and Beverage Undisputed 01/23/2026 1138428314 CMS
Paragon 28, Inc. $156.26 04/12/2024 Travel and Lodging Undisputed 01/23/2026 1138428316 CMS
Paragon 28, Inc. $6,562.50 05/14/2024 Consulting Fee Undisputed 01/23/2026 1138428365 CMS
Paragon 28, Inc. $225.81 05/22/2024 Royalty or License Undisputed 01/23/2026 1138428391 CMS
Paragon 28, Inc. $1,942.76 05/22/2024 Royalty or License Undisputed 01/23/2026 1138428393 CMS
Paragon 28, Inc. $215.37 08/29/2024 Royalty or License Undisputed 01/23/2026 1138428395 CMS
Paragon 28, Inc. $1,375.67 08/29/2024 Royalty or License Undisputed 01/23/2026 1138428397 CMS
Paragon 28, Inc. $75.60 11/18/2024 Food and Beverage Undisputed 01/23/2026 1138428363 CMS
Paragon 28, Inc. $11.59 11/21/2024 Royalty or License Undisputed 01/23/2026 1138428399 CMS
Paragon 28, Inc. $139.46 11/21/2024 Royalty or License Undisputed 01/23/2026 1138428401 CMS
Smith+Nephew, Inc. $20.38 09/17/2024 Food and Beverage Undisputed 01/23/2026 1149540437 CMS
Stryker Corporation $39.66 01/25/2024 Food and Beverage Undisputed 01/23/2026 1119795526 CMS
Stryker Corporation $171.17 02/02/2024 Food and Beverage Undisputed 01/23/2026 1119795528 CMS
Stryker Corporation $114.69 03/08/2024 Food and Beverage Undisputed 01/23/2026 1119795530 CMS
Stryker Corporation $156.28 05/02/2024 Food and Beverage Undisputed 01/23/2026 1119795532 CMS
Stryker Corporation $41.41 05/09/2024 Food and Beverage Undisputed 01/23/2026 1119795534 CMS
Stryker Corporation $15.63 10/29/2024 Food and Beverage Undisputed 01/23/2026 1119795536 CMS
Trimed, Inc. $84.10 10/30/2024 Food and Beverage Undisputed 01/23/2026 1146116637 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

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