Matthew Seidel, MD
Orthopaedic Surgery · Phoenix, AZNPI 1376523399
Payments from drug & device makers
What this record shows
The money is spread across several categories — royalties or licence payments (56.7%), consulting fees and speaking fees — rather than concentrated in one kind of arrangement. 15 manufacturers reported payments, led by Onkos Surgical, Inc. at 38.9% of the total. Among orthopaedic surgery clinicians in AZ 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 206 payments — averaging $1928.03 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Onkos Surgical, Inc.$155K
- Microport Orthopedics Inc$152K
- Linkbio Corp$51K
- Stryker$27K
- Daiichi Sankyo Inc.$9K
- Bone Support Inc.$3K
- plus $607 from 9 others
What the payments were for
- Royalty or licence$225,11957%
- Consulting fees$82,78521%
- Speaking & faculty fees$50,74513%
- Travel & lodging$31,6138%
- Food & beverage$6,9122%
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 |
|---|---|---|
| Onkos Surgical, Inc. | 31 | $154,681 |
| Microport Orthopedics Inc | 109 | $152,348 |
| Linkbio Corp | 23 | $51,189 |
| Stryker | 13 | $26,846 |
| Daiichi Sankyo Inc. | 5 | $8,786 |
| Bone Support Inc. | 12 | $2,718 |
| Johnson & Johnson | 2 | $154 |
| Davol Inc. | 2 | $152 |
| Bioventus LLC | 2 | $113 |
| Catalyst Orthoscience | 1 | $64 |
| Smith+Nephew | 2 | $39 |
| UOC USA Inc | 1 | $39 |
| KCI USA, Inc. | 1 | $24 |
| Acera Surgical, Inc. | 1 | $15 |
| Orthofix Medical, Inc. | 1 | $7 |
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.
- ELEOS LIMB SALVAGE SYSTEM$150,220
- MPO Hip System$145,811
- PRO-DENSE$26,804
- Turalio$8,773
- MPO Medial Pivot Knee$5,038
- CERAMENTBONE VOID FILLER$2,528
- CERAMENT G$143
- Velys$119
How this compares
$397,174 in reported general payments places this provider in the 95th percentile of 377 orthopaedic surgery providers in Arizona.
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 |
|---|---|---|
| Ibuprofen | 41 | $401 |
| Gabapentin | 22 | $400 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 33 | $379 |
| Oxycodone Hcl | 44 | $207 |
| Cephalexin | 25 | $154 |
| Methylprednisolone | 24 | $130 |
| Tramadol Hcl | 20 | $39 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Phoenix
- Evan LedermanPhoenix$12M
- James ChowPhoenix$6.1M
- Michael McKeePhoenix$3.4M
- Henry ClarkePhoenix$1.9M
- Samuel HarmsenPhoenix$735K
- Anthony HedleyPhoenix$415K
- David OttPhoenix$380K
- Michael WilminkPhoenix$347K
- Judd CummingsPhoenix$269K
- Thomas CarterPhoenix$265K
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.