Highest-Volume Pacemaker — Dual Chamber Surgeons in Colorado (2026 update)
34 Colorado providers billed Medicare for Pacemaker — Dual Chamber (CPT 33208) 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 | Charles Johnson, M.D. | Fort Collins, CO | 37 |
| 2 | Oussama Lawand, M.D. | Boulder, CO | 35 |
| 3 | Eric Riles, MD | Loveland, CO | 35 |
| 4 | Richard Garmany, MD | Grand Junction, CO | 34 |
| 5 | Christine Tompkins, MD | Aurora, CO | 31 |
| 6 | Charles Stout, M.D. | Pueblo, CO | 30 |
| 7 | Margot Vloka, M.D. | Aurora, CO | 30 |
| 8 | Charles Fuenzalida, MD | Aurora, CO | 28 |
| 9 | Christopher Porterfield, MD FACC | Aurora, CO | 27 |
| 10 | John Moore, MD | Grand Junction, CO | 25 |
24 more Colorado 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 Pacemaker — Dual Chamber in Colorado?
- 34 Colorado providers billed Medicare for Pacemaker — Dual Chamber (CPT 33208) 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.