Knee replacement clinicians in Denver, Colorado

CMS lists 40 clinicians with a primary specialty of Orthopedic Surgery, Sports Medicine, or Hand Surgery who have billed Medicare for at least one knee replacement and practice in Denver, Colorado (details below).

Knee replacement volume

Clinician	Knee replacements billed	Percentile rank
Derek Johnson, MD	154	97%
Jason Jennings, PT	116	94%
Charlie Yang, MD	113	93%
Todd Miner, MD	98	91%
Brian Larkin, MD	91	89%
Jordan Schaeffer, MD	88	89%
Joseph Assini, MD	80	87%
Edward Parks, MD	77	86%
Robert Greenhow, MD	74	85%
Douglas Dennis, MD	73	85%
Adam Holzmeister, MD	68	83%
Edward Rojas, MD	66	82%
Harold Hunt, MD	60	80%
Joshua Labott	54	77%
Hunter Warwick, MD	47	73%
Ryan Caufield, MD	46	72%
Aaron Baxter, MD	41	69%
Jeffrey Arthur, DO	34	63%
Shawn Nakamura, MD	32	61%
Rajesh Bazaz, MD	28	57%
Andrew Apple, MD	22	50%
Judith Kopinski, MD	22	50%
Michael Gaffney, MD	16	41%
Daniel Hamman, MD	14	37%
Sean Baran, MD	13	35%
Daniel Lerman, MD	13	35%
Raul Gosthe, MD	12	33%
Kareem Sobky, MD	12	33%
Steven Swinehart, MD	11	31%
Edward Anderson, MD	1-10	31% or below
Eric Basler, MD	1-10	31% or below
Eric Hammerberg, MD	1-10	31% or below
Austin Heare, MD	1-10	31% or below
Marissa Jamieson, MD	1-10	31% or below
Timothy Muratore, MD	1-10	31% or below
Justin Newman, MD	1-10	31% or below
Hailee Reist, MD	1-10	31% or below
Raveesh Richard, MD	1-10	31% or below
Stephen Stacey, MD	1-10	31% or below
Zeke Walton, MD	1-10	31% or below

Sorted by the number of knee replacements billed to Medicare, highest first, not by quality or skill. CMS suppresses counts between 1 and 10 to protect patient privacy and publishes the range instead.

Understanding CMS Data

CMS's "Knee replacement" category combines specific billing codes for knee replacement surgery to calculate the number of times each clinician billed Medicare for a "Knee replacement." These include first-time knee replacement, partial knee replacement, and revision of a previous knee replacement. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of knee replacements a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Orthopedic Surgery, Sports Medicine, or Hand Surgery (as reported to Medicare) are presented.

Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).