Mark Williams, DPM
Foot & Ankle Surgery · Davison, MINPI 1669575478
Payments from drug & device makers
Across 88 payments — averaging $56.71 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$2K
- Smith+Nephew$747
- Rikco International, LLC$718
- Zimmer Biomet$194
- Treace Medical Concepts, Inc.$186
- Bioventus LLC$184
- plus $967 from 11 others
What the payments were for
- Food & beverage$4,24285%
- Education$74815%
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(2 entities) | 31 | $1,994 |
| Smith+Nephew | 10 | $747 |
| Rikco International, LLC | 15 | $718 |
| Zimmer Biomet | 2 | $194 |
| Treace Medical Concepts, Inc. | 2 | $186 |
| Bioventus LLC | 2 | $184 |
| Paragon 28, Inc. | 4 | $168 |
| Cardiovascular Systems Inc. | 3 | $161 |
| Organogenesis Inc. | 7 | $155 |
| Mimedx Group, Inc. | 2 | $148 |
| Acera Surgical, Inc. | 1 | $94 |
| Medtronic(2 entities) | 2 | $61 |
| Cardinal Health 200 LLC | 1 | $58 |
| Vertex | 2 | $55 |
| Osteomed LLC | 2 | $30 |
| Abbott | 1 | $23 |
| Amgen | 1 | $15 |
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.
- ORTHOLOC 2 LAPIFUSE$293
- GRAFIX PL$228
- Exogen Ultrasound Bone Healing System$167
- PROSTEP MICA$152
- ORTHOLOC 3DI$152
- ORTHOLOC 3DI CROSSCHECK$152
- ALLOMATRIX$149
- PICO 7$139
- RENASYS GO v2 HOME$139
- RENASYS TOUCH$139
- Actishield$136
- AUGMENT INJECTABLE$134
- Stravix$131
- TMC NANOPLASTY SYSTEM$113
- PROstep$108
- Subchondroplasty$105
How this compares
$4,990 in reported general payments places this provider in the 60th percentile of 384 foot & ankle surgery providers in Michigan.
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 |
|---|---|---|
| Ciclopirox | 24 | $433 |
| Terbinafine Hcl | 18 | $303 |
| Cephalexin | 22 | $229 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 78 | $228 |
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 26 | $209 |
| Econazole Nitrate | 11 | $203 |
| Clindamycin Hcl | 12 | $65 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 27 | $57 |
| Levofloxacin | 11 | $25 |
Paid to pharmacies, not to this prescriber.
Other foot & ankle surgery in Davison
- John AndersonGrand Rapids$1.3M
- Brian LoderClinton Township$893K
- Karl DunnClinton Twp$434K
- John MaskillGrand Rapids$424K
- Anthony LalamaMacomb$421K
- Christopher ZingasSaint Clair Shores$227K
- Michael SwordsLansing$202K
- Gregory SheremetaTroy$87K
- Jason WesloskyClinton Township$87K
- Hatim BurhaniGrosse Pointe Woods$77K
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.