Dr. Zachary Hamby, MD
Dr. Zachary Hamby is a board-certified orthopedic surgeon practicing in Evansville, Indiana. A Medicare provider since 2008, Dr. Hamby has performed 33 Medicare-verified knee replacements (#99 in Indiana) and 12 hip replacements, for a combined total of 45 procedures.
In Indiana, Dr. Hamby performs below average in knee (33 vs 44 avg), below average in hip (12 vs 32 avg).
Dr. Hamby's reported Medicare volume is split between knee replacements (33 cases) and hip replacements (12 cases).
Evansville is home to 9 orthopedic surgeons in the current Medicare dataset. Patients in the Evansville area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Hamby extend back to 2013, covering 9 years of data. Over that period, recorded procedure volume increased from 11 to 45 in the most recent data, a 309% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Hamby's 33 knee replacement procedures is below the national average of 45 among 6,720 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. Hamby Compares
Procedure volume compared to the Indiana state average.
Contact & Location
Evansville, IN 47715
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Hamby's Medicare-recorded procedure volume has trended upward over 9 years, increasing 309% from 11 procedures in 2013 to 45 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.
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.
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. Hamby
How does Dr. Hamby's procedure volume compare to other Indiana surgeons?
Dr. Hamby has performed 45 Medicare-verified joint replacement procedures. The Indiana average is 60 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Hamby ranks #117 out of 222 orthopedic surgeons in Indiana.
What types of joint replacement does Dr. Hamby perform?
Dr. Hamby's Medicare data shows procedures in knee replacement (33 cases) and hip replacement (12 cases).
Are there other orthopedic surgeons near Dr. Hamby in Evansville?
Yes. There are 9 orthopedic surgeons in Evansville 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 Indiana surgeons.
What does the Medicare data for Dr. Hamby 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. Hamby's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 45 procedures shown here.
Has Dr. Hamby's procedure volume changed over time?
Yes. Dr. Hamby's Medicare-recorded volume has increased from 11 procedures in 2013 to 45 in the most recent data, a 309% increase over 9 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 45 procedures in 2023.
Does Dr. Hamby perform more than one type of joint replacement?
Yes. Dr. Hamby's Medicare data shows procedures in knee replacement (33 cases), hip replacement (12 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Hamby affiliated with?
According to CMS facility affiliation data, Dr. Hamby is affiliated with Ascension St Vincent Evansville, Deaconess Gibson Hospital.
How does Dr. Hamby compare to other orthopedic surgeons in Evansville?
Among the 9 orthopedic surgeons in Evansville, Dr. Hamby ranks #5 by total Medicare procedure volume. The highest-volume surgeon in Evansville has 205 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Hamby practices?
Ascension St Vincent Evansville (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 Evansville, Indiana
Dr. Hamby's 45 Medicare procedures are below the Evansville average of 89. The table below compares verified procedure volumes for orthopedic surgeons practicing in Evansville.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Michael Boyd | 205 | Hip, Knee |
| Dr. Peter Knoll | 148 | Hip, Knee |
| Dr. Paul Perry | 81 | Shoulder |
| Dr. Jeana Lee | 66 | Knee, Shoulder |
| Dr. Andrew Saltzman | 43 | Knee |
| Dr. Timothy Hamby | 38 | Knee |
Patient Reviews & Ratings
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