Dr. Alan Gegenheimer, D.O.
Contact & Location
Pleasant Prairie, WI 53158
Dr. Alan Gegenheimer is a board-certified orthopedic surgeon practicing in Pleasant Prairie, Wisconsin. A Medicare provider since 2006, Dr. Gegenheimer has performed 19 Medicare-verified knee replacements (#110 in Wisconsin) and 13 hip replacements, for a combined total of 32 procedures.
In Wisconsin, Dr. Gegenheimer performs below average in knee (19 vs 36 avg), below average in hip (13 vs 29 avg).
Dr. Gegenheimer's reported Medicare volume is split between knee replacements (19 cases) and hip replacements (13 cases).
Pleasant Prairie is home to 3 orthopedic surgeons in the current Medicare dataset. Patients in the Pleasant Prairie area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Gegenheimer extend back to 2021, covering 4 years of data. Over that period, recorded procedure volume increased from 11 to 32 in the most recent data, a 191% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Gegenheimer's 19 knee replacement procedures is below the national average of 45 among 6,599 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.
How Dr. Gegenheimer Compares
Procedure volume compared to the Wisconsin state average.
Volume Trend Analysis
Dr. Gegenheimer's Medicare-recorded procedure volume has trended upward over 4 years, increasing 191% from 11 procedures in 2021 to 32 in the most recent data.
Hospital Affiliations & Quality
Quality ratings and complication rates are hospital-level metrics from CMS Hospital Compare and do not reflect individual surgeon performance. Star ratings updated quarterly. Complication data covers a rolling 3-year period.
Patient Resources: Preparing for Knee Replacement
If you are considering knee replacement surgery, these evidence-based guides can help you prepare and recover:
An overview of current surgical approaches including robotic-assisted and minimally invasive techniques, implant options, and expected outcomes.
Prehabilitation: Preparing Your Body for SurgeryEvidence-based exercises and lifestyle adjustments that can improve surgical outcomes and speed recovery when started weeks before your procedure.
Rehabilitation Roadmap: Your Complete Recovery GuideA structured physical therapy progression from the first post-op exercises through full strength and mobility restoration over 3 to 6 months.
Medicare Bundled Payment Programs for Joint ReplacementHow bundled payment models affect your joint replacement costs and care coordination, and what it means for hospital and surgeon selection.
Knee Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after knee replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full knee replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Gegenheimer
How does Dr. Gegenheimer's procedure volume compare to other Wisconsin surgeons?
Dr. Gegenheimer has performed 32 Medicare-verified joint replacement procedures. The Wisconsin average is 51 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Gegenheimer ranks #113 out of 189 orthopedic surgeons in Wisconsin.
What types of joint replacement does Dr. Gegenheimer perform?
Dr. Gegenheimer's Medicare data shows procedures in knee replacement (19 cases) and hip replacement (13 cases).
Are there other orthopedic surgeons near Dr. Gegenheimer in Pleasant Prairie?
Yes. There are 3 orthopedic surgeons in Pleasant Prairie in the current Medicare dataset. Patients can compare procedure volumes and specializations to choose the surgeon who best fits their needs. Use the state page to view all Wisconsin surgeons.
What does the Medicare data for Dr. Gegenheimer represent?
The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. Gegenheimer's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 32 procedures shown here.
Has Dr. Gegenheimer's procedure volume changed over time?
Yes. Dr. Gegenheimer's Medicare-recorded volume has increased from 11 procedures in 2021 to 32 in the most recent data, a 191% increase over 4 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 32 procedures in 2022.
Does Dr. Gegenheimer perform more than one type of joint replacement?
Yes. Dr. Gegenheimer's Medicare data shows procedures in knee replacement (19 cases), hip replacement (13 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Gegenheimer affiliated with?
According to CMS facility affiliation data, Dr. Gegenheimer is affiliated with Froedtert Pleasant Prairie Hospital.
How does Dr. Gegenheimer compare to other orthopedic surgeons in Pleasant Prairie?
Among the 3 orthopedic surgeons in Pleasant Prairie, Dr. Gegenheimer ranks #2 by total Medicare procedure volume. Dr. Gegenheimer is among the highest-volume surgeons in Pleasant Prairie.
What are the quality ratings for hospitals where Dr. Gegenheimer practices?
Froedtert Pleasant Prairie Hospital (1 out of 5 CMS stars, insufficient case volume for complication rate comparison). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Pleasant Prairie, Wisconsin
Dr. Gegenheimer's 32 Medicare procedures are above the Pleasant Prairie average of 28. The table below compares verified procedure volumes for orthopedic surgeons practicing in Pleasant Prairie.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Scott Simmons | 33 | Knee |
| Dr. Mhd Alsawaf | 18 | Shoulder |
Patient Resources & Verification
Research reviews, verify credentials, and check official quality data through these trusted sources:
Medicare Care Compare and NPI Registry are official U.S. government sources. Google reviews reflect user-submitted feedback. OrthoProcedures.com does not verify the accuracy of third-party review content.