Dr. Samuel Ashby, D.O.
Contact & Location
623-876-3870
Sun City West, AZ 85375
Peoria, AZ 85381
Dr. Ashby performs more knee replacement procedures than 88% of orthopedic surgeons in Arizona, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #18 of 152 ranked knee surgeons in Arizona.
About Dr. Ashby
Practice. Dr. Samuel Ashby is a board-certified orthopedic surgeon practicing in Sun City West, Arizona. The latest annual CMS data records 94 knee replacements and 29 hip replacements, 123 procedures in all. That is #18 in Arizona for knee replacement. A Medicare provider since 2015.
Trend. Medicare records run from 2020 to 2024, 5 years. Volume rose from 55 procedures a year to 123, up 124%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 94 procedures is more than 2x the national average of 45.
Local context. Sun City West has 5 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist. Dr. Ashby also holds hospital privileges in AZ and KS, a practice that extends beyond Arizona.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 15 | 40 |
| 2021 | 37 | 71 |
| 2022 | 32 | 76 |
| 2023 | 33 | 71 |
| 2024 | 29 | 94 |
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims are one payer stream among several, and the share they represent differs by procedure. In 2024 it was 23% to 28% for knee replacement, 25% to 33% for hip replacement. Each verified count above is divided by its own procedure's range, and the results are added, to estimate total practice volume across all payers. The verified Medicare count is the definitive, audited figure; this is a range derived from published national volume projections, not a measurement, and an individual practice can sit well outside it: how these ranges are derived, and their sources.
How Dr. Ashby Compares
Procedure volume compared to the Arizona state average.
Volume Trend Analysis
Dr. Ashby's Medicare-recorded procedure volume has trended upward over 5 years, increasing 124% from 55 procedures in 2020 to 123 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. Ashby
How does Dr. Ashby's procedure volume compare to other Arizona surgeons?
Dr. Ashby has performed 123 Medicare-verified joint replacement procedures. This is significantly above the Arizona average of 72 procedures per surgeon. Dr. Ashby ranks #33 out of 191 orthopedic surgeons in Arizona.
What types of joint replacement does Dr. Ashby perform?
Dr. Ashby's Medicare data shows procedures in knee replacement (94 cases) and hip replacement (29 cases).
How experienced is Dr. Ashby with knee replacement surgery?
Dr. Ashby ranks #18 in Arizona for knee replacement with 94 Medicare-verified procedures. This high ranking among 191 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Ashby in Sun City West?
Yes. There are 5 orthopedic surgeons in Sun City West 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 Arizona surgeons.
What does the Medicare data for Dr. Ashby represent?
The procedure counts shown are based on 2024 Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). Medicare fee-for-service is only one payer stream, and the share of national volume it represents differs by procedure. In 2024 the share was 23% to 28% for knee replacement, 25% to 33% for hip replacement, which puts Dr. Ashby's total volume across all insurers at roughly 420 to 520 procedures against the 123 verified here. Those shares are derived from published national volume projections rather than quoted from a single publication, and they are estimates with real uncertainty. The OrthoProcedures methodology page shows the full derivation, the sources, and the limits at orthoprocedures.com/data-methodology.html.
Has Dr. Ashby's procedure volume changed over time?
Yes. Dr. Ashby's Medicare-recorded volume has increased from 55 procedures in 2020 to 123 in the most recent data, a 124% increase over 5 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 123 procedures in 2024.
Does Dr. Ashby perform more than one type of joint replacement?
Yes. Dr. Ashby's Medicare data shows procedures in knee replacement (94 cases), hip replacement (29 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Ashby affiliated with?
According to CMS facility affiliation data, Dr. Ashby is affiliated with Banner Del E. Webb Medical Center, Kansas Medical Center Llc. Dr. Ashby maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
How does Dr. Ashby compare to other orthopedic surgeons in Sun City West?
Among the 5 orthopedic surgeons in Sun City West, Dr. Ashby ranks #1 by total Medicare procedure volume. Dr. Ashby has the highest verified Medicare volume in the city.
What are the quality ratings for hospitals where Dr. Ashby practices?
Banner Del E. Webb Medical Center (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Kansas Medical Center Llc (2 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 Sun City West, Arizona
Dr. Ashby's 123 Medicare procedures are above the Sun City West average of 90. The table below compares verified procedure volumes for orthopedic surgeons practicing in Sun City West.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. John Brown | 120 | Shoulder |
| Dr. Mark Campbell | 119 | Hip, Knee |
| Dr. Brenton Albracht | 70 | Hip, Knee |
| Dr. Michael McKernan | 20 | 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.