Knee replacement clinicians in Grand Rapids, Michigan

CMS lists 36 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 Grand Rapids, Michigan (details below).

Knee replacement volume

Clinician	Knee replacements billed	Percentile rank
Scott Sporer, MD	280	99%
Donald Knapke, MD	195	99%
Perry Greene, MD	126	95%
Charles Sherry, DO	79	87%
Kory Johnson, DO	68	83%
Derick Johnson, DO	62	81%
Timothy Gossett, MD	53	76%
John Mahajan, MD	40	68%
Michael Jabara, MD	39	67%
Paull Gossett, MD	32	61%
Bryan Pack, MD	31	60%
Karl Roberts, MD	31	60%
Timothy Henne, MD	28	57%
Kurt Geffken, MD	27	55%
Thomas Malvitz, MD	26	54%
Jerry Lorio, MD	25	53%
Clayton Perry, MD	25	53%
Jacob Lytle, DO	19	45%
Benjamin Strong, MD	19	45%
Andrew Fras, MD	17	42%
Patrick Zietz, MD	17	42%
Geoffrey Sandman, MD	16	41%
Thomas Matelic, MD	15	39%
Charles Crellin, MD	12	33%
Jeffrey Anhalt, DO	1-10	31% or below
Marshall Boose, DO	1-10	31% or below
Jeffrey Cross, MD	1-10	31% or below
Kristopher Danielson, DO	1-10	31% or below
Erik Hedlund, DO	1-10	31% or below
John Maskill, MD	1-10	31% or below
Stephen O'Neil, DO	1-10	31% or below
Garett Pangrazzi, MD	1-10	31% or below
Tyler Spiering, MD	1-10	31% or below
Kevin Steelman, MD	1-10	31% or below
Peter Theut, MD	1-10	31% or below
Thomas Wenzlick, 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).