Matthew Diesselhorst, MD
Orthopaedic Surgery · Oklahoma City, OKNPI 1104022417
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 77 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 20 manufacturers reported payments, led by Stryker at 30.1% of the total. That places this record below the midpoint for orthopaedic surgery clinicians in OK, where the typical reported total is $4,342.
Across 77 payments — averaging $31.94 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$740
- Smith+Nephew$698
- Pylant Medical$173
- Pacira Pharmaceuticals Incorporated$152
- Pacira Therapeutics, Inc.$137
- Biotissue Holdings Inc.$119
- plus $439 from 14 others
Across 1 payment — averaging $20,300 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.
- Smith+Nephew$20K
What the payments were for
- Food & beverage$2,460100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Stryker | 20 | $740 |
| Smith+Nephew | 19 | $698 |
| Pylant Medical | 2 | $173 |
| Pacira Pharmaceuticals Incorporated | 7 | $152 |
| Pacira Therapeutics, Inc. | 8 | $137 |
| Biotissue Holdings Inc. | 1 | $119 |
| Johnson & Johnson | 3 | $103 |
| Bioventus LLC | 3 | $70 |
| Boston Scientific | 1 | $60 |
| Acumed LLC | 2 | $30 |
| Innovation Technologies Inc | 1 | $26 |
| Amgen | 2 | $24 |
| Medacta USA, Inc. | 1 | $22 |
| Kowa Pharmaceuticals America, Inc. | 1 | $20 |
| Vertex | 1 | $19 |
| Organogenesis Inc. | 1 | $16 |
| Dynasplint Systems Inc. | 1 | $16 |
| ERMI LLC | 1 | $14 |
| Orthofix Medical, Inc. | 1 | $10 |
| International Life Sciences | 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.
- AIR$174
- LENS Surgical Imaging System$143
How this compares
$2,460 in reported general payments places this provider in the 35th percentile of 263 orthopaedic surgery providers in Oklahoma.
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 | 157 | $2,966 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 70 | $847 |
| Naproxen | 60 | $566 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 34 | $469 |
| Methocarbamol | 31 | $230 |
| Cephalexin | 19 | $137 |
| Amoxicillin | 21 | $24 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Oklahoma City
- Andrew ParkinsonOklahoma City$3.1M
- Bradley ReddickOklahoma City$573K
- Jason EmersonOklahoma City$189K
- Ronald DumiganOklahoma City$169K
- Paul MaitinoOklahoma City$110K
- Thomas TkachOklahoma City$83K
- Brian LevingsOklahoma City$80K
- Christopher WhiteOklahoma City$73K
- Raymond SteinmetzOklahoma City$64K
- Michael JohnsonOklahoma City$63K
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.