Knee replacement clinicians in Phoenix, Arizona

CMS lists 47 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 Phoenix, Arizona (details below).

Knee replacement volume

Clinician	Knee replacements billed	Percentile rank
Bertrand Kaper, MD	206	99%
Steven Werner, DO	173	98%
Russell Cohen, MD	160	97%
Lige Kaplan, MD	116	94%
Robert Pivec, MD	97	91%
Henry Clarke, MD	96	90%
Bourck Cashmore, MD	91	89%
Charles Creasman, MD	60	80%
Michael Domer, MD	51	75%
Amalia Decomas, MD	49	74%
Sepein Chiang, DO	47	73%
Scott Siverhus, MD	45	72%
Michael Brennan, MD	43	70%
Judd Cummings, MD	43	70%
Joshua Silver, MD	40	68%
Cody Olson, DO	37	65%
Andrew Adamczyk, MD	35	64%
Richard Martin, MD	35	64%
Michael Duran, MD	31	60%
Rachel Semus, DO	31	60%
Matthew Seidel, MD	27	55%
Meagan Tibbo, MD	27	55%
Carla Strohhofer, MD	25	53%
Michael Dersam, MD	22	50%
Steven Kassman, MD	17	42%
Delwyn Worthington, MD	17	42%
Tyler Collins, MD	15	39%
Joseph Walker, MD	14	37%
Michael Weng, MD	13	35%
Thomas Goodine, MD	12	33%
Brad Bruns, MD	1-10	31% or below
Jordan Conroy, MD	1-10	31% or below
Sumit Dewanjee, MD	1-10	31% or below
Benjamin Geer, MD	1-10	31% or below
Michael Hayman, MD	1-10	31% or below
Kirk Hippensteel, MD	1-10	31% or below
David Jacofsky, MD	1-10	31% or below
Keith Jarbo, MD	1-10	31% or below
James Lendrum, MD	1-10	31% or below
Kristen Maskala, MD	1-10	31% or below
Elliot Mendelsohn, MD	1-10	31% or below
Neil Motzkin, MD	1-10	31% or below
Dipak Ramkumar, MD	1-10	31% or below
Brian Shafer, MD	1-10	31% or below
Michael Sochacki, MD	1-10	31% or below
John Tidwell, MD	1-10	31% or below
Craig Weinstein, 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).