Christiaan Mamczak, DO
Orthopaedic Trauma · St Petersburg, FLNPI 1912112384
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $114,988 of the $182,199 with a category attached, or 63.1%. Smith+Nephew accounts for 97.0% of it on its own, with 22 other manufacturers making up the rest.
Across 372 payments — averaging $489.78 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Smith+Nephew$177K
- Curvafix, Inc.$3K
- Stryker$581
- Si-bone, Inc.$301
- Synthes GmbH$250
- Bioventus LLC$168
- plus $1K from 17 others
What the payments were for
- Consulting fees$28,61316%
- Speaking & faculty fees$114,98863%
- Travel & lodging$24,99314%
- Food & beverage$13,6067%
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 |
|---|---|---|
| Smith+Nephew | 313 | $176,810 |
| Curvafix, Inc. | 2 | $2,847 |
| Stryker(2 entities) | 24 | $581 |
| Si-bone, Inc. | 5 | $301 |
| Synthes GmbH | 1 | $250 |
| Bioventus LLC | 3 | $168 |
| Johnson & Johnson(2 entities) | 2 | $161 |
| Novastep Inc. | 1 | $148 |
| Haemonetics Corporation | 2 | $145 |
| Radius Health, Inc. | 2 | $141 |
| CGG Medical Inc | 1 | $118 |
| MVP Orthopedics Inc | 3 | $99 |
| Solventum Corporation | 1 | $89 |
| Biocomposites Inc | 1 | $80 |
| Illuminoss Medical, Inc. | 1 | $60 |
| DJO, LLC | 2 | $50 |
| Pacira Therapeutics, Inc. | 2 | $39 |
| Kerecis Limited | 1 | $29 |
| Integra Lifesciences Corporation | 1 | $23 |
| Amgen | 1 | $22 |
| Acumed LLC | 1 | $15 |
| Orthopediatrics Corp. | 1 | $12 |
| Orthofix Medical, Inc. | 1 | $12 |
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.
- EVOS$147,017
- TRIGEN InterTAN$70,414
- TRIGEN$36,237
- EVOS MINI$34,037
- Peri-Loc$32,922
- CANNULATED SCREWS$32,612
- META TAN$31,050
- Conquest FN$30,270
- TRIGEN Meta-Nail$22,533
- Jet-X$21,300
- Taylor Spatial Frame$15,074
- SMART TSF$13,452
- Peri-Loc VLP$10,908
- Peri-Loc PFP$10,350
- ILIZAROV$5,051
- CurvaFix IM Implant$2,750
- TRIGEN Femoral (FAN/TAN/Meta Nail)$1,302
- TRIGEN Sureshot$1,158
- Ilizarov System$772
- TRIGEN Humeral Nail System$525
How this compares
$182,199 in reported general payments places this provider in the 85th percentile of 65 orthopaedic trauma providers in Florida.
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 | 22 | $162 |
| Gabapentin | 15 | $135 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 12 | $118 |
| Tramadol Hcl | 21 | $72 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic trauma in St Petersburg
- Daniel DziadoszSt Petersburg$262K
- Joseph TemperatoSt Petersburg$31K
- William RosenblumSt Petersburg$3K
- J Dean ColeOrlando$4.2M
- Vuong NguyenOrlando$1.4M
- Edward PerezFt Lauderdale$981K
- Hassan MirTemple Terrace$877K
- Daniel SeginaMelbourne$330K
- Kenneth KovalOrlando$321K
- Mohamed ShaathOrlando$303K
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.