Highest-Volume Cataract Surgery with IOL Surgeons in Minnesota (2026 update)
256 Minnesota providers billed Medicare for Cataract Surgery with IOL (CPT 66984) 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 | Deborah Ristvedt, D.O. | Alexandria, MN | 468 |
| 2 | Penelope Swanson, MD | Manakato, MN | 458 |
| 3 | Nathan Carpenter, MD | Mankato, MN | 451 |
| 4 | Steven Thom, MD | Fergus Falls, MN | 436 |
| 5 | Sunil Khanna, M.D. | Rochester, MN | 431 |
| 6 | Yun-Sen Chu, M.D. | Bloomington, MN | 403 |
| 7 | Steven Engman, M.D. | Austin, MN | 392 |
| 8 | Emily Birkholz, M.D. | Mankato, MN | 350 |
| 9 | Jeffrey Fischer, M.D. | Willmar, MN | 328 |
| 10 | Michael Mahr, M.D. | Rochester, MN | 328 |
246 more Minnesota surgeons in the full list
Plus: who already pays them (Stryker? Medtronic? Arthrex?), CSV export for your CRM, and every other state and procedure.
Search the full databaseFrequently asked questions
- How many surgeons perform Cataract Surgery with IOL in Minnesota?
- 256 Minnesota providers billed Medicare for Cataract Surgery with IOL (CPT 66984) 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.