Michael Ambroziak, DPM
Foot & Ankle Surgery · Bay City, MINPI 1336105329
Payments from drug & device makers
Across 36 payments — averaging $31.57 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson$414
- Smith+Nephew$333
- Stryker$208
- Amgen$150
- Paratek Pharmaceuticals, Inc.$16
- Medtronic$16
What the payments were for
- Food & beverage$1,04292%
- Gifts$948%
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 |
|---|---|---|
| Johnson & Johnson(2 entities) | 6 | $414 |
| Smith+Nephew | 18 | $333 |
| Stryker(2 entities) | 6 | $208 |
| Amgen | 4 | $150 |
| Paratek Pharmaceuticals, Inc. | 1 | $16 |
| Medtronic | 1 | $16 |
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.
How this compares
$1,137 in reported general payments places this provider in the 25th 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 |
|---|---|---|
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 67 | $1,169 |
| Clindamycin Hcl | 33 | $552 |
| Ammonium Lactate | 26 | $519 |
| Ciprofloxacin Hcl | 41 | $512 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 30 | $357 |
| Cephalexin | 20 | $315 |
| Silver Sulfadiazine | 23 | $254 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 41 | $172 |
| SsdSilver Sulfadiazine | 24 | $135 |
| Allopurinol | 12 | $121 |
| Clotrimazole | 17 | $102 |
| Meloxicam | 14 | $82 |
Paid to pharmacies, not to this prescriber.
Other foot & ankle surgery in Bay City
- 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.