Byron Willis, MD
Neurological Surgery · Phoenix, AZNPI 1316960842
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (46.3%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. Stryker accounts for 84.6% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2023 at $19,747 and has fallen 88.7% since, to $2,234 in 2025.
Across 351 payments — averaging $87.69 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$26K
- Abbott$2K
- VB Spine LLC$1K
- Si-bone, Inc.$513
- Icotec Medical Inc.$334
- Centinel Spine, LLC$234
- plus $121 from 4 others
What the payments were for
- Consulting fees$14,25046%
- Travel & lodging$5,63818%
- Food & beverage$10,89035%
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 | 255 | $26,046 |
| Abbott | 18 | $2,034 |
| VB Spine LLC | 64 | $1,495 |
| Si-bone, Inc. | 5 | $513 |
| Icotec Medical Inc. | 2 | $334 |
| Centinel Spine, LLC | 1 | $234 |
| Boston Scientific | 3 | $56 |
| Intrinsic Therapeutics | 1 | $44 |
| Biotronik Inc. | 1 | $17 |
| Orthofix Medical, Inc. | 1 | $4 |
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.
- MAKO$8,000
- ProLift$5,148
- EVEREST SPINAL SYSTEM$2,817
- PROCLAIM$690
- Proclaim Family of SCS IPGs$673
- CAPRI CORPECTOMY CAGE SYSTEM$324
- YUKON OCT SPINAL SYSTEM$299
- STRYKER NAV3I$298
- PRODISC L$234
- CASPIAN SPINAL SYSTEM$229
- Octrode SCS Leads$180
- VADER PEDICLE SYSTEM 6.0, SCREW, Carbon/PEEK, POLYAX., FEN., O 5.5 X 45 MM$176
- VADER PEDICLE SYSTEM, ROD, Carbon/PEEK, CURVED, 6.0 R450 X 200 MM$176
- KONG-TL VBR, END PLATE, ROUND, L AND SCREW, 12 X 43 MM$176
- KONG-TL VBR, END PLATE, RECTANGULAR, M AND SCREW, 12 X 33 MM$176
- KONG-TL VBR E, EXPANDABLE BODY, L, 19 MM X 27 - 37 MM$176
- N/A$175
- SERRATO$163
- Proclaim IPG$160
- icotec BlackArmor Spine System$159
How this compares
$30,778 in reported general payments places this provider in the 70th percentile of 173 neurological surgery providers in Arizona.
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.
Other neurological surgery in Phoenix
- Robert SpetzlerPhoenix$12.8M
- Juan UribePhoenix$6.7M
- Stephen PapadopoulosPhoenix$6M
- Volker SonntagPhoenix$2M
- Jay TurnerPhoenix$1.2M
- Michael LawtonPhoenix$761K
- Bryan LeePhoenix$441K
- Randall PorterPhoenix$410K
- Joseph ZabramskiPhoenix$381K
- Francisco PoncePhoenix$292K
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.