Highest-Volume Total Knee Replacement (TKA) Surgeons in California (2026 update)
507 California providers billed Medicare for Total Knee Replacement (TKA) (CPT 27447) 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 | Alexander Sah, MD | Fremont, CA | 513 |
| 2 | Andrew Yun, MD | Beverly Hills, CA | 373 |
| 3 | John Dearborn, MD | Menlo Park, CA | 318 |
| 4 | Ghassan Boghosian, DO | Rancho Mirage, CA | 296 |
| 5 | Harpreet Bawa, M.D. | Westlake Village, CA | 217 |
| 6 | John Diana, M.D. | Napa, CA | 207 |
| 7 | Jay Patel, M.D. | Orange, CA | 199 |
| 8 | Ryan Moore, MD | Saint Helena, CA | 188 |
| 9 | Thomas Ferro, M.D. | Arroyo Grande, CA | 183 |
| 10 | Matthew Simons, M.D. | Fresno, CA | 182 |
497 more California 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 Total Knee Replacement (TKA) in California?
- 507 California providers billed Medicare for Total Knee Replacement (TKA) (CPT 27447) 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.