David Thordarson, MD
Orthopaedic Surgery · Los Angeles, CANPI 1457363798
Payments from drug & device makers
What this record shows
This record is dominated by ownership interests: $2,200,000 of the $2,532,991 with a category attached, or 86.9%. Paragon 28, Inc. accounts for 89.4% of it on its own, with 18 other manufacturers making up the rest. Reporting peaked in 2020 at $2,209,968 and has fallen 96.4% since, to $79,640 in 2025. Among orthopaedic surgery clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 201 payments — averaging $12,602 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Paragon 28, Inc.$2.3M
- Extremity Medical$110K
- Ortho Solutions Inc$59K
- Stryker$51K
- Orthofix Medical, Inc.$23K
- Trilliant Surgical LLC.$12K
- plus $12K from 13 others
Across 8 payments — averaging $9493.06 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Paragon 28, Inc.$55K
- Stryker$21K
Across 3 payments — averaging $277.78 each. An ownership or investment interest held by the physician or an immediate family member.
- Extremity Medical$833
- Paragon 28, Inc.$0
What the payments were for
- Royalty or licence$74,0393%
- Consulting fees$228,0819%
- Grants$5,0000%
- Travel & lodging$19,7381%
- Food & beverage$5,1140%
- Education$1,0190%
- Ownership interest$2,200,00087%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Paragon 28, Inc. | 36 | $2,265,092 |
| Extremity Medical | 51 | $110,399 |
| Ortho Solutions Inc | 12 | $58,925 |
| Stryker(2 entities) | 43 | $50,566 |
| Orthofix Medical, Inc. | 20 | $23,319 |
| Trilliant Surgical LLC. | 8 | $12,225 |
| Medshape, Inc. | 4 | $3,774 |
| Encore Medical, LP | 3 | $3,500 |
| Seaspine Orthopedics Corporation | 7 | $1,560 |
| Novastep Inc. | 3 | $1,158 |
| Micromed Inc | 1 | $1,019 |
| Exactech, Inc. | 2 | $367 |
| Saxum Surgical, Inc. | 3 | $246 |
| Crossroads Extremity Systems, LLC | 1 | $147 |
| Treace Medical Concepts, Inc. | 1 | $147 |
| Medartis Inc. | 1 | $146 |
| Smith+Nephew | 3 | $144 |
| Ossio Inc | 1 | $131 |
| Zimmer Biomet | 1 | $125 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- Product Portfolio$43,548
- IO FiX$38,970
- STAR$36,592
- Joint prep$24,636
- ANCHORAGE$20,576
- ASNIS$20,455
- VARIAX$20,455
- HOFFMANN$20,455
- Strand$15,300
- T2$9,234
- Portfolio$7,397
- 13mm STAR E+ Sliding Core STAR Total Ankle$5,135
- MedShape DynaNail$3,500
- TTC NAIL$3,335
- Physio-Stim$3,150
- MAX LOCK$2,775
- Strand Plus$2,700
- HINDFOOT$1,948
- Trilliant Arsenal Plating System$750
- AXSOS$584
How this compares
$2,532,991 in reported general payments places this provider in the 95th percentile of 1,808 orthopaedic surgery providers in California.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Celecoxib | 19 | $2,201 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 68 | $1,096 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 53 | $495 |
| Gabapentin | 46 | $439 |
| Diclofenac Sodium | 21 | $351 |
| Doxycycline Hyclate | 38 | $278 |
| Ibuprofen | 17 | $126 |
| Meloxicam | 37 | $69 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Los Angeles
- Kelly VinceLos Angeles$9.6M
- Jay LiebermanLos Angeles$4.8M
- Thomas SchmalzriedLos Angeles$4M
- David SkaggsLos Angeles$2.6M
- Edward McPhersonLos Angeles$1.2M
- Daniel AllisonLos Angeles$1.1M
- Justin SalimanLos Angeles$912K
- Charles MoonLos Angeles$760K
- Andrew SpitzerLos Angeles$738K
- Yashar JavidanLos Angeles$685K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.