William Spak, DPM
Foot & Ankle Surgery · Anaheim, CANPI 1922189000
Payments from drug & device makers
Across 107 payments — averaging $46.11 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Biotissue Holdings Inc.$2K
- Stryker$1K
- Smith+Nephew$351
- Organogenesis Inc.$268
- Integra Lifesciences Corporation$178
- Zimmer Biomet$148
- plus $645 from 14 others
What the payments were for
- Travel & lodging$1,46430%
- Food & beverage$3,47070%
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 |
|---|---|---|
| Biotissue Holdings Inc. | 19 | $2,267 |
| Stryker(2 entities) | 26 | $1,077 |
| Smith+Nephew | 19 | $351 |
| Organogenesis Inc. | 4 | $268 |
| Integra Lifesciences Corporation | 10 | $178 |
| Zimmer Biomet | 6 | $148 |
| Acera Surgical, Inc. | 1 | $116 |
| Musculoskeletal Transplant Foundation Inc. | 4 | $109 |
| Saxum Surgical, Inc. | 2 | $87 |
| Angiodynamics, Inc. | 2 | $86 |
| Johnson & Johnson(2 entities) | 3 | $50 |
| Polynovo North America LLC | 2 | $49 |
| Inari Medical, Inc. | 1 | $26 |
| Amniox Medical, Inc. | 2 | $25 |
| Nevro Corp. | 1 | $19 |
| Paratek Pharmaceuticals, Inc. | 1 | $18 |
| Averitas Pharma Inc. | 1 | $16 |
| Tactile Systems Technology Inc | 1 | $16 |
| Acell, Inc. | 1 | $15 |
| Medartis Inc. | 1 | $14 |
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.
- NEOX$553
- CLARIX$553
- AUGMENT INJECTABLE$310
- PuraPly$221
- ORTHOLOC 2 LAPIFUSE$170
- Restrata Wound Matrix$116
How this compares
$4,934 in reported general payments places this provider in the 70th percentile of 1,126 foot & ankle surgery providers in California.
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 |
|---|---|---|
| SantylCollagenase Clostridium Hist. | 17 | $9,243 |
| Nitro-BidNitroglycerin | 17 | $1,185 |
| Doxycycline Hyclate | 78 | $387 |
| Gentamicin Sulfate | 12 | $379 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 29 | $167 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 24 | $133 |
| Terbinafine Hcl | 12 | $76 |
| Ciprofloxacin Hcl | 27 | $67 |
| Clindamycin Hcl | 12 | $30 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Smith+NephewSantyl | $351 | $9,24317 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 70th percentile of 1,126 foot & ankle surgery providers in California.
Other foot & ankle surgery in Anaheim
- John ZimmermanBakersfield$4.6M
- Eric GizaSacramento$3.7M
- Thomas HarrisPasadena$3M
- Felix SigalLos Angeles$2.2M
- Thomas ChangSanta Rosa$2.1M
- Michael CoughlinSan Francisco$1.6M
- Vladimir ZeetserEncino$677K
- Jason NowakRedding$526K
- Candice BradyCamarillo$462K
- Andrew HsuOrange$456K
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.