Dr. Evan Zahner, MD
Contact & Location
Stoneham, MA 02180
Dr. Evan Zahner is a board-certified orthopedic surgeon practicing in Stoneham, Massachusetts. A Medicare provider since 2006, Dr. Zahner has performed 29 Medicare-verified hip replacements (#68 in Massachusetts) and 20 knee replacements, for a combined total of 49 procedures.
In Massachusetts, Dr. Zahner performs below average in hip (29 vs 44 avg), below average in knee (20 vs 50 avg).
Dr. Zahner's reported Medicare volume is split between hip replacements (29 cases) and knee replacements (20 cases).
Stoneham is home to 3 orthopedic surgeons in the current Medicare dataset. Patients in the Stoneham area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Zahner extend back to 2014, covering 10 years of data. Over that period, recorded procedure volume increased from 15 to 49 in the most recent data, a 227% increase. This sustained growth reflects an expanding joint replacement practice.
Among 4,532 hip replacement surgeons tracked nationally, Dr. Zahner's 29 verified procedures is near the national average of 36.
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. Zahner Compares
Procedure volume compared to the Massachusetts state average.
Volume Trend Analysis
Dr. Zahner's Medicare-recorded procedure volume has trended upward over 10 years, increasing 227% from 15 procedures in 2014 to 49 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.
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.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
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.
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. Zahner
How does Dr. Zahner's procedure volume compare to other Massachusetts surgeons?
Dr. Zahner has performed 49 Medicare-verified joint replacement procedures. The Massachusetts average is 74 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Zahner ranks #101 out of 203 orthopedic surgeons in Massachusetts.
What types of joint replacement does Dr. Zahner perform?
Dr. Zahner's Medicare data shows procedures in hip replacement (29 cases) and knee replacement (20 cases).
Are there other orthopedic surgeons near Dr. Zahner in Stoneham?
Yes. There are 3 orthopedic surgeons in Stoneham 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 Massachusetts surgeons.
What does the Medicare data for Dr. Zahner 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. Zahner's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 49 procedures shown here.
Has Dr. Zahner's procedure volume changed over time?
Yes. Dr. Zahner's Medicare-recorded volume has increased from 15 procedures in 2014 to 49 in the most recent data, a 227% increase over 10 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 72 procedures in 2023.
Does Dr. Zahner perform more than one type of joint replacement?
Yes. Dr. Zahner's Medicare data shows procedures in hip replacement (29 cases), knee replacement (20 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Zahner affiliated with?
According to CMS facility affiliation data, Dr. Zahner is affiliated with Melrosewakefield Healthcare, Winchester Hospital.
How does Dr. Zahner compare to other orthopedic surgeons in Stoneham?
Among the 3 orthopedic surgeons in Stoneham, Dr. Zahner ranks #1 by total Medicare procedure volume. Dr. Zahner has the highest verified Medicare volume in the city.
What are the quality ratings for hospitals where Dr. Zahner practices?
Melrosewakefield Healthcare (2 out of 5 CMS stars, hip/knee complication rate similar to national average); Winchester Hospital (3 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 Stoneham, Massachusetts
Dr. Zahner's 49 Medicare procedures are above the Stoneham average of 35. The table below compares verified procedure volumes for orthopedic surgeons practicing in Stoneham.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Abraham Shurland | 43 | Knee |
| Dr. Marie Walcott | 13 | 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.