Highest-Volume Upper GI Endoscopy (EGD) with Biopsy Surgeons in California (2026 update)
1295 California providers billed Medicare for Upper GI Endoscopy (EGD) with Biopsy (CPT 43239) 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 | Frederick Boghossian, M.D. | Glendale, CA | 570 |
| 2 | Chia Chi Lai, M.D. | Monterey Park, CA | 524 |
| 3 | Long Dang, M.D. | Westminster, CA | 522 |
| 4 | Donald Abrahm, M.D. | Newport Beach, CA | 501 |
| 5 | Mordo Suchov, MD | Monterey Park, CA | 486 |
| 6 | Paramvir Rahal, MD | Bakersfield, CA | 485 |
| 7 | Vivaik Tyagi, M.D. | Lancaster, CA | 481 |
| 8 | Joel Sach, M.D. | Tarzana, CA | 473 |
| 9 | John Hong, MD | Fallbrook, CA | 467 |
| 10 | James Conti, M.D. | Rancho Mirage, CA | 425 |
1285 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 Upper GI Endoscopy (EGD) with Biopsy in California?
- 1295 California providers billed Medicare for Upper GI Endoscopy (EGD) with Biopsy (CPT 43239) 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.