Total Payments
$2.8M
2024 Payments
$118,058
Companies
37
Transactions
701
Medicare Patients
9,168
Medicare Billing
$825,106
Payment Breakdown by Category
Royalty/License$2.0M (71.8%)
Consulting$616,745 (22.4%)
Other$63,194 (2.3%)
Travel$57,851 (2.1%)
Food & Beverage$28,271 (1.0%)
Research$9,235 (0.3%)
Education$1,561 (0.1%)
Gifts$105.32 (0.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Royalty or License | $2.0M | 87 | 71.8% |
| Consulting Fee | $616,745 | 98 | 22.4% |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $63,194 | 15 | 2.3% |
| Travel and Lodging | $57,851 | 165 | 2.1% |
| Food and Beverage | $28,271 | 311 | 1.0% |
| Unspecified | $9,235 | 19 | 0.3% |
| Education | $1,561 | 5 | 0.1% |
| Gift | $105.32 | 1 | 0.0% |
Payments by Type
General
$2.7M
682 transactions
Research
$9,235
8 transactions
Ownership
$0
11 transactions
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| Paragon 28, Inc. | $1.6M | 206 | $0 (2024) |
| DePuy Synthes Products, Inc. | $748,283 | 29 | $0 (2024) |
| Stryker Corporation | $109,494 | 103 | $0 (2024) |
| OSSIO INC | $90,508 | 36 | $0 (2024) |
| Bioventus LLC | $73,433 | 100 | $0 (2024) |
| Medical Device Business Services, Inc. | $47,414 | 51 | $0 (2024) |
| CROSSROADS EXTREMITY SYSTEMS, LLC | $30,285 | 33 | $0 (2021) |
| BioMedical Enterprises, Inc. | $24,778 | 8 | $0 (2017) |
| Cartiva, Inc. | $21,786 | 18 | $0 (2018) |
| DePuy Synthes Sales Inc. | $17,002 | 23 | $0 (2024) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $118,058 | 74 | Paragon 28, Inc. ($36,198) |
| 2023 | $209,411 | 66 | Paragon 28, Inc. ($111,728) |
| 2022 | $329,798 | 75 | Paragon 28, Inc. ($200,315) |
| 2021 | $471,124 | 69 | Paragon 28, Inc. ($314,092) |
| 2020 | $422,327 | 48 | Paragon 28, Inc. ($228,248) |
| 2019 | $464,014 | 101 | Paragon 28, Inc. ($284,213) |
| 2018 | $406,555 | 103 | Paragon 28, Inc. ($215,634) |
| 2017 | $329,330 | 165 | Paragon 28, Inc. ($181,200) |
All Payment Transactions
701 individual payment records from CMS Open Payments — Page 1 of 29
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 12/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Food and Beverage | In-kind items and services | $24.77 | General |
| Category: DEVICES | ||||||
| 11/21/2024 | Paragon 28, Inc. | Portfolio (Device) | Royalty or License | Cash or cash equivalent | $139.46 | General |
| Category: FOOT AND ANKLE IMPLANTS | ||||||
| 11/21/2024 | Paragon 28, Inc. | Portfolio (Device) | Royalty or License | Cash or cash equivalent | $11.59 | General |
| Category: FOOT AND ANKLE IMPLANTS | ||||||
| 11/18/2024 | Paragon 28, Inc. | Additive Orthopedics (Device) | Food and Beverage | Cash or cash equivalent | $75.60 | General |
| Category: FOOT AND ANKLE IMPLANTS | ||||||
| 11/06/2024 | Nevro Corp. | Senza (Device) | Food and Beverage | In-kind items and services | $109.31 | General |
| Category: Spinal Cord Stimulator | ||||||
| 11/05/2024 | Electronic Waveform Lab, Inc. | — | Food and Beverage | Cash or cash equivalent | $19.22 | General |
| 10/30/2024 | Trimed, Inc. | Tools - WFS (Device) | Food and Beverage | Cash or cash equivalent | $84.10 | General |
| Category: Orthopedics/Orthopedic Surgery | ||||||
| 10/29/2024 | Stryker Corporation | GRAFTJACKET (Device) | Food and Beverage | In-kind items and services | $15.63 | General |
| Category: TRAUMA & EXTREMITIES | ||||||
| 09/24/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | Cash or cash equivalent | $825.00 | General |
| Category: DEVICES | ||||||
| 09/23/2024 | Alafair Biosciences, Inc. | VersaWrap (Device) | Food and Beverage | In-kind items and services | $114.13 | General |
| Category: Surgical Mesh | ||||||
| 09/17/2024 | Carbofix Orthopedics Inc | — | Food and Beverage | Cash or cash equivalent | $110.64 | General |
| 09/17/2024 | Smith+Nephew, Inc. | Renasys (Device) | Food and Beverage | In-kind items and services | $20.38 | General |
| Category: Negative Pressure Wound Therapy | ||||||
| 09/14/2024 | Alafair Biosciences, Inc. | VersaWrap (Device) | Food and Beverage | In-kind items and services | $63.12 | General |
| Category: Surgical Mesh | ||||||
| 09/10/2024 | DePuy Synthes Sales Inc. | — | Food and Beverage | In-kind items and services | $127.30 | General |
| 09/09/2024 | Paragon 28, Inc. | Total Talus (Device) | — | Cash or cash equivalent | $269.00 | Research |
| Study: Total Talus PAS • Category: FOOT AND ANKLE IMPLANTS | ||||||
| 08/29/2024 | Paragon 28, Inc. | Portfolio (Device) | Royalty or License | Cash or cash equivalent | $1,375.67 | General |
| Category: FOOT AND ANKLE IMPLANTS | ||||||
| 08/29/2024 | Paragon 28, Inc. | Portfolio (Device) | Royalty or License | Cash or cash equivalent | $215.37 | General |
| Category: FOOT AND ANKLE IMPLANTS | ||||||
| 08/28/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Food and Beverage | In-kind items and services | $6.58 | General |
| Category: DEVICES | ||||||
| 07/31/2024 | DePuy Synthes Products, Inc. | HAMMERLOCK (Device) | Royalty or License | Cash or cash equivalent | $1,739.69 | General |
| Category: Trauma | ||||||
| 06/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | Cash or cash equivalent | $9,350.00 | General |
| Category: DEVICES | ||||||
| 06/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Travel and Lodging | Cash or cash equivalent | $628.56 | General |
| Category: DEVICES | ||||||
| 06/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Travel and Lodging | Cash or cash equivalent | $92.80 | General |
| Category: DEVICES | ||||||
| 06/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Travel and Lodging | Cash or cash equivalent | $74.34 | General |
| Category: DEVICES | ||||||
| 06/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Travel and Lodging | Cash or cash equivalent | $72.00 | General |
| Category: DEVICES | ||||||
| 06/18/2024 | Bioventus LLC | EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) | Travel and Lodging | Cash or cash equivalent | $70.00 | General |
| Category: DEVICES | ||||||
Research Studies & Clinical Trials
| Study Name | Company | Amount | Records |
|---|---|---|---|
| Patient Specific Talus Spacer Post Approval Study | Paragon 28, Inc. | $6,531 | 5 |
| PROSPECTIVE CLINICAL EVALUATION OF EARLY WEIGHT-BEARING AFTER LAPIDUS ARTHRODESIS USING THE PHANTOM INTRAMEDULLARY NAIL | Paragon 28, Inc. | $1,810 | 1 |
| Total Talus PAS | Paragon 28, Inc. | $894.00 | 2 |
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 23 | 2,253 | 3,662 | $991,310 | $209,318 |
| 2022 | 30 | 2,445 | 3,835 | $675,953 | $215,317 |
| 2021 | 28 | 2,410 | 3,581 | $434,839 | $214,500 |
| 2020 | 25 | 2,060 | 3,125 | $487,711 | $185,971 |
Total Patients
9,168
Total Services
14,203
Medicare Billing
$825,106
Procedure Codes
109
All Medicare Procedures & Services
109 procedure records from CMS Medicare Utilization — Page 1 of 5
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2023 | 520 | 1,017 | $329,477 | $74,163 | 22.5% |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | Office | 2023 | 297 | 297 | $117,826 | $25,781 | 21.9% |
| 73630 | X-ray of foot, minimum of 3 views | Office | 2023 | 383 | 738 | $100,272 | $22,139 | 22.1% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 138 | 170 | $77,576 | $17,754 | 22.9% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 65 | 65 | $38,113 | $8,921 | 23.4% |
| 73610 | X-ray of ankle, minimum of 3 views | Office | 2023 | 149 | 257 | $37,401 | $8,410 | 22.5% |
| 28750 | Fusion of big toe at joint with foot | Facility | 2023 | 14 | 16 | $46,054 | $7,843 | 17.0% |
| 28285 | Correction of toe joint deformity | Facility | 2023 | 20 | 32 | $63,584 | $6,427 | 10.1% |
| 29405 | Application of short leg cast | Office | 2023 | 42 | 78 | $22,597 | $5,206 | 23.0% |
| 11055 | Removal of noncancer thickened skin growth, 1 growth | Office | 2023 | 55 | 72 | $20,537 | $4,561 | 22.2% |
| 97750 | Test or measurement for functional capacity, each 15 minutes | Office | 2023 | 90 | 182 | $19,656 | $4,540 | 23.1% |
| 11056 | Removal of noncancer thickened skin growth, 2-4 growths | Office | 2023 | 48 | 60 | $19,445 | $4,418 | 22.7% |
| 20605 | Aspiration and/or injection of fluid from medium joint | Office | 2023 | 61 | 93 | $18,307 | $4,371 | 23.9% |
| 28308 | Incision or partial removal of foot bone (other than big toe) to straighten toe | Facility | 2023 | 11 | 13 | $27,614 | $3,173 | 11.5% |
| 11721 | Removal of fingernails or toenails, 6 or more nails | Office | 2023 | 65 | 85 | $13,737 | $3,126 | 22.8% |
| Q4038 | Cast supplies, short leg cast, adult (11 years +), fiberglass | Office | 2023 | 24 | 40 | $3,200 | $1,421 | 44.4% |
| 20550 | Injection into tendon or ligament | Office | 2023 | 27 | 28 | $5,971 | $1,334 | 22.3% |
| 20600 | Aspiration and/or injection of fluid from small joint | Office | 2023 | 27 | 32 | $6,693 | $1,311 | 19.6% |
| 11730 | Simple separation of fingernail or toenail from nail bed, first nail | Office | 2023 | 14 | 14 | $6,127 | $1,280 | 20.9% |
| 73620 | X-ray of foot, 2 views | Office | 2023 | 43 | 48 | $5,275 | $1,178 | 22.3% |
| 64455 | Injection of anesthetic and/or steroid drug into foot nerve | Office | 2023 | 24 | 30 | $5,420 | $1,175 | 21.7% |
| 11720 | Removal of fingernails or toenails, 1-5 nails | Office | 2023 | 18 | 19 | $2,289 | $555.35 | 24.3% |
| J3301 | Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Office | 2023 | 118 | 276 | $4,140 | $231.86 | 5.6% |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | Office | 2022 | 499 | 974 | $189,331 | $69,147 | 36.5% |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | Office | 2022 | 328 | 328 | $75,539 | $27,394 | 36.3% |
About Dr. Thomas Chang, D.P.M
Dr. Thomas Chang, D.P.M is a Foot & Ankle Surgery healthcare provider based in Santa Rosa, California. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 03/20/2007. The National Provider Identifier (NPI) number assigned to this provider is 1841315736.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Thomas Chang, D.P.M has received a total of $2.8M in payments from pharmaceutical and medical device companies, with $118,058 received in 2024. These payments were reported across 701 transactions from 37 companies. The most common payment nature is "Royalty or License" ($2.0M).
As a Medicare-enrolled provider, Chang has provided services to 9,168 Medicare beneficiaries, totaling 14,203 services with total Medicare billing of $825,106. Data is available for 4 years (2020–2023), covering 109 distinct procedure/service records.
Ad
Practice Information
- Specialty Foot & Ankle Surgery
- Location Santa Rosa, CA
- Active Since 03/20/2007
- Last Updated 12/08/2016
- Taxonomy Code 213ES0103X
- Entity Type Individual
- Practice Solo Practitioner
- NPI Number 1841315736
Products in Payments
- Product Portfolio (Device) $494,994
- Foot and Ankle Implants (Device) $239,453
- Portfolio (Device) $141,835
- GORILLA (Device) $76,633
- PRESERVE (Biological) $76,389
- Exogen (Device) $46,719
- HAMMERLOCK (Device) $42,464
- ANCHORAGE (Device) $29,187
- BME - NITINOL CONTINUOUS COMPRESSION IMPLANTS (Device) $24,778
- Cartiva (Device) $21,786
- VARIAX (Device) $19,527
- EXOGEN ULTRASOUND BONE HEALING SYSTEM (Device) $18,738
- MOTOBAND (Device) $16,326
- Anchorage (Device) $16,000
- AXSOS (Device) $14,496
- PRODUCT PORTFOLIO (Device) $12,796
- Medical Implant (Device) $11,454
- HEADLESS COMPRESSION SCREWS (Device) $8,459
- Exogen Ultrasound Bone Healing System (Device) $6,964
- Talus Spacer (Device) $6,531
Explore
Data Sources
Provider data from NPPES. Payment data from CMS Open Payments. Medicare data from CMS Medicare Provider Utilization. All data is public and updated periodically.
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