Highest-Volume Lumbar Fusion — Posterior Surgeons in Wisconsin (2026 update)
10 Wisconsin providers billed Medicare for Lumbar Fusion — Posterior (CPT 22612) in 2024. The top 10 by case volume are below — the full ranked list, CSV export and competitor-payment intel are available with a DocVol subscription ($199/mo, cancel anytime).
Database refreshed July 2026Live NPPES registryⓘ sources
| # | Surgeon | Location | Medicare cases (2024) |
|---|---|---|---|
| 1 | William Kemp, MD | Madison, WI | 26 |
| 2 | Walter Jacobsen, DO | Milwaukee, WI | 24 |
| 3 | Andrew Beaumont, M.D., PH.D. | Wausau, WI | 23 |
| 4 | Seth Williams, M.D. | Madison, WI | 18 |
| 5 | John Styliaras, MD | La Crosse, WI | 16 |
| 6 | Arvind Ahuja, M.D. | Franklin, WI | 16 |
| 7 | James Bernatz, M.D. | Madison, WI | 16 |
| 8 | Paul Baek, MD | Green Bay, WI | 15 |
| 9 | Lawrence Maciolek, M.D. | Glendale, WI | 14 |
| 10 | Paul Johnson, M.D. | Pewaukee, WI | 14 |
Frequently asked questions
- How many surgeons perform Lumbar Fusion — Posterior in Wisconsin?
- 10 Wisconsin providers billed Medicare for Lumbar Fusion — Posterior (CPT 22612) in CY2024. CMS suppresses providers with 10 or fewer Medicare patients, so the true count is somewhat higher.
- Where does this data come from?
- CMS Medicare Physician & Other Practitioners (fee-for-service Part B claims, CY2024, released May 2026) and CMS Open Payments. Both are official U.S. federal datasets.
- Does this include all of a surgeon's cases?
- No — it covers traditional Medicare only (no Medicare Advantage, commercial, or Medicaid claims). Absolute volumes undercount total practice, but the ranking of high- vs low-volume surgeons is a strong targeting signal.