Highest-Volume Cataract Surgery with MIGS Stent Surgeons in South Dakota (2026 update)
9 South Dakota providers billed Medicare for Cataract Surgery with MIGS Stent (CPT 66991) 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 | John Berdahl, M.D. | Sioux Falls, SD | 159 |
| 2 | John Bormes, M.D. | Aberdeen, SD | 107 |
| 3 | Adam Jorgensen, M.D. | Rapid City, SD | 74 |
| 4 | Tanner Ferguson, MD | Sioux Falls, SD | 68 |
| 5 | Daniel Terveen, M.D. | Sioux Falls, SD | 49 |
| 6 | Christopher Huot, M.D. | Rapid City, SD | 40 |
| 7 | Stephen Khachikian, M.D. | Rapid City, SD | 36 |
| 8 | Gail Bernard | Rapid City, SD | 26 |
| 9 | Brent Kramer, M.D. | Sioux Falls, SD | 25 |
Frequently asked questions
- How many surgeons perform Cataract Surgery with MIGS Stent in South Dakota?
- 9 South Dakota providers billed Medicare for Cataract Surgery with MIGS Stent (CPT 66991) 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.