Dr. Zachary Hamby, MD
Contact & Location
812-477-1558
Evansville, IN 47715
About Dr. Hamby
Dr. Zachary Hamby is a board-certified orthopedic surgeon practicing in Evansville, Indiana. A Medicare provider since 2008, Dr. Hamby performed 24 Medicare-verified knee replacements in the latest annual CMS data, ranking #133 in Indiana.
In Indiana, Dr. Hamby performs below the state average in knee (24 vs 41).
Dr. Hamby's Medicare data shows a focused knee replacement practice with 24 verified procedures. Surgeons who concentrate on a single procedure type often develop deep procedural expertise, though total practice volume may include additional procedures not captured in Medicare fee-for-service data.
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.
Dr. Hamby's Medicare data spans 10 years, beginning in 2013. Volume peaked at 45 procedures in 2023 before settling at 24 in the most recent data. Changes in Medicare reporting, payer mix shifts, or practice focus adjustments can all influence year-to-year volume.
Dr. Hamby's 24 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)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 0 | 11 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 16 |
| 2017 | 0 | 18 |
| 2018 | 0 | 13 |
| 2019 | 0 | 22 |
| 2020 | 0 | 18 |
| 2021 | 0 | 29 |
| 2022 | 0 | 28 |
| 2023 | 12 | 33 |
| 2024 | 0 | 24 |
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.
Volume Trend Analysis
Dr. Hamby's recorded volume peaked at 45 procedures in 2023 and stood at 24 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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 24 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 #172 out of 224 orthopedic surgeons in Indiana.
What types of joint replacement does Dr. Hamby perform?
Dr. Hamby's reported Medicare volume is focused on knee replacement, with 24 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
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 24 procedures shown here.
Has Dr. Hamby's procedure volume changed over time?
Dr. Hamby's Medicare-recorded volume peaked at 45 procedures in 2023 and was 24 in the most recent data. Volume fluctuations can reflect changes in payer mix, practice focus, or Medicare reporting rather than a change in overall surgical activity.
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 #8 by total Medicare procedure volume. The highest-volume surgeon in Evansville has 199 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 24 Medicare procedures are below the Evansville average of 86. The table below compares verified procedure volumes for orthopedic surgeons practicing in Evansville.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Michael Boyd | 199 | Hip, Knee |
| Dr. Peter Knoll | 169 | Hip, Knee |
| Dr. Paul Perry | 71 | Shoulder |
| Dr. Jeana Lee | 65 | Knee, Shoulder |
| Dr. Andrew Saltzman | 45 | Knee |
| Dr. Timothy Hamby | 32 | Knee |
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.