Knee replacement volume in Ballwin, Missouri
26 clinicians CMS lists under Orthopedic Surgery, Sports Medicine, or Hand Surgery billed at least one knee replacement in Ballwin in the June 2026 release.
Clinicians
| Clinician | Knee replacements billed | Percentile rank |
|---|---|---|
| Ryan Nunley, MD | 293 | 99% |
| Christopher Palmer, DO | 143 | 96% |
| Coles Lhommedieu, MD | 89 | 89% |
| Richard Johnston, MD | 80 | 87% |
| Brian Wegman, MD | 73 | 85% |
| Richard Rames, MD | 60 | 80% |
| Daniel Martin, MD | 56 | 78% |
| David Irvine, MD | 55 | 78% |
| Ryan Couchman, MD | 50 | 75% |
| Andrew Spitzfaden, MD | 50 | 75% |
| Gregory Galakatos, MD | 49 | 74% |
| Robert Sigmund, MD | 45 | 72% |
| Korey Partenheimer, DO | 40 | 68% |
| Richard Rames, MD | 40 | 68% |
| Kimberly Bartosiak, MD | 35 | 64% |
| Matthew Collard, MD | 32 | 61% |
| William Behrens, MD | 26 | 55% |
| James Burke, MD | 20 | 47% |
| Daniel Schwarze, MD | 20 | 47% |
| Corey Solman, MD | 19 | 46% |
| Vince Lai, MD | 17 | 43% |
| Robert Sciortino, MD | 17 | 43% |
| Robert Comrie | 15 | 39% |
| Timothy Farley, MD | 1-10 | 32% or below |
| Waleed Mohammad, MD | 1-10 | 32% or below |
| John Tessier, MD | 1-10 | 32% or below |
Sorted by the number of knee replacements billed to Medicare, highest first. This is an ordering of one published figure, not a ranking of quality, skill, or outcomes. CMS suppresses counts of 10 and below to protect patient privacy and publishes the range instead, which is not a count of zero; 3 of these clinicians carry that range.
Understanding CMS Data
These figures are based on knee replacements billed to Original Medicare and Medicare Advantage as reported by the Centers for Medicare & Medicaid Services (CMS) in their June 2026 data release. The CMS data doesn't include procedures performed for patients who have other health care coverage (e.g., commercially insured, self pay, or VA). Furthermore, CMS sums up specific billing codes that cover first-time knee replacement, partial knee replacement, and revision of a previous knee replacement to calculate the total number of knee replacements. Billing variation and coding errors could potentially affect CMS's data. Therefore, the knee replacement volume data reported by CMS may be higher or lower than the actual total knee replacements performed by a clinician. We share the total knee replacement figures for the clinicians CMS lists under Orthopedic Surgery, Sports Medicine, or Hand Surgery as CMS publishes them, without alteration.
Source: Centers for Medicare & Medicaid Services (June 2026 release).