Dr. Scott Zehnder, M.D.
Dr. Scott Zehnder is a board-certified orthopedic surgeon practicing in Saint Louis, Missouri. A Medicare provider since 2007, Dr. Zehnder has performed 18 Medicare-verified hip replacements (#56 in Missouri) and 16 knee replacements, for a combined total of 34 procedures.
In Missouri, Dr. Zehnder performs below average in hip (18 vs 30 avg), below average in knee (16 vs 43 avg).
Dr. Zehnder's reported Medicare volume is split between hip replacements (18 cases) and knee replacements (16 cases).
Saint Louis is home to 50 orthopedic surgeons in the current Medicare dataset. Patients in the Saint Louis area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Zehnder extend back to 2020, covering 3 years of data. Over that period, recorded procedure volume increased from 12 to 34 in the most recent data, a 183% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Zehnder's 18 hip replacement procedures is below the national average of 36 among 4,526 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
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. Zehnder Compares
Procedure volume compared to the Missouri state average.
Contact & Location
Saint Louis, MO 63141
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Zehnder's Medicare-recorded procedure volume has trended upward over 3 years, increasing 183% from 12 procedures in 2020 to 34 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 Hip Replacement
If you are considering hip replacement surgery, these evidence-based guides can help you prepare and recover:
Understanding the progression from conservative treatments to surgical intervention, and how to determine when hip replacement becomes the right choice.
What to Expect on the Day of SurgeryA step-by-step walkthrough of your surgical day, from pre-op preparation through anesthesia, the procedure itself, and the first hours of recovery.
Home Safety: Creating Your Recovery SanctuaryRoom-by-room modifications, equipment recommendations, and fall-prevention strategies to prepare your home for a safe post-surgical recovery.
Medicare Coverage for Joint ReplacementWhat Medicare Part A and Part B cover for joint replacement surgery, including hospital stays, surgeon fees, anesthesia, and physical therapy.
Hip Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after hip replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full hip replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Zehnder
How does Dr. Zehnder's procedure volume compare to other Missouri surgeons?
Dr. Zehnder has performed 34 Medicare-verified joint replacement procedures. The Missouri average is 56 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Zehnder ranks #118 out of 199 orthopedic surgeons in Missouri.
What types of joint replacement does Dr. Zehnder perform?
Dr. Zehnder's Medicare data shows procedures in hip replacement (18 cases) and knee replacement (16 cases).
Are there other orthopedic surgeons near Dr. Zehnder in Saint Louis?
Yes. There are 50 orthopedic surgeons in Saint Louis 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 Missouri surgeons.
What does the Medicare data for Dr. Zehnder 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. Zehnder's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 34 procedures shown here.
Has Dr. Zehnder's procedure volume changed over time?
Yes. Dr. Zehnder's Medicare-recorded volume has increased from 12 procedures in 2020 to 34 in the most recent data, a 183% increase over 3 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 40 procedures in 2022.
Does Dr. Zehnder perform more than one type of joint replacement?
Yes. Dr. Zehnder's Medicare data shows procedures in hip replacement (18 cases), knee replacement (16 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Zehnder affiliated with?
According to CMS facility affiliation data, Dr. Zehnder is affiliated with Missouri Baptist Medical Center, St Lukes Hospital.
How does Dr. Zehnder compare to other orthopedic surgeons in Saint Louis?
Among the 50 orthopedic surgeons in Saint Louis, Dr. Zehnder ranks #33 by total Medicare procedure volume. The highest-volume surgeon in Saint Louis has 263 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Zehnder practices?
Missouri Baptist Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); St Lukes Hospital (4 out of 5 CMS stars, hip/knee complication rate similar to national average). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Saint Louis, Missouri
Dr. Zehnder's 34 Medicare procedures are below the Saint Louis average of 133. The table below compares verified procedure volumes for orthopedic surgeons practicing in Saint Louis.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Ryan Nunley | 263 | Hip, Knee |
| Dr. Michael Hubbard | 135 | Hip, Knee, Shoulder |
| Dr. Christopher Mudd | 130 | Hip, Knee |
| Dr. Ilya Bendich | 128 | Hip, Knee |
| Dr. Coles L'hommedieu | 122 | Hip, Knee |
| Dr. Christopher Palmer | 121 | Hip, Knee |
Patient Reviews & Ratings
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