Dr. John Xenos, M.D.
Contact & Location
303-662-8250
Lone Tree, CO 80124
About Dr. Xenos
Dr. John Xenos is a board-certified orthopedic surgeon practicing in Lone Tree, Colorado. A Medicare provider since 2006, Dr. Xenos performed 75 Medicare-verified knee replacements (#18 in Colorado) and 46 hip replacements in the latest annual CMS data, for a combined total of 121 procedures.
In Colorado, Dr. Xenos performs above the state average in knee (75 vs 48), above the state average in hip (46 vs 38).
Dr. Xenos's reported Medicare volume is split between knee replacements (75 cases) and hip replacements (46 cases).
Lone Tree is home to 7 orthopedic surgeons in the current Medicare dataset. Patients in the Lone Tree area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Xenos's Medicare record spans 12 years from 2013 through 2024. Procedure volume has remained consistent during that period, ranging from 109 to 183 procedures per year, reflecting a steady joint replacement practice.
Among 6,599 knee replacement surgeons tracked nationally, Dr. Xenos's 75 verified procedures is above the national average of 45.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 25 | 94 |
| 2014 | 33 | 76 |
| 2015 | 47 | 68 |
| 2016 | 56 | 91 |
| 2017 | 65 | 118 |
| 2018 | 71 | 112 |
| 2019 | 56 | 90 |
| 2020 | 49 | 95 |
| 2021 | 66 | 108 |
| 2022 | 61 | 98 |
| 2023 | 60 | 92 |
| 2024 | 46 | 75 |
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. Xenos Compares
Procedure volume compared to the Colorado state average.
Volume Trend Analysis
Dr. Xenos's procedure volume has been consistent across 12 years of Medicare data, ranging from 109 to 183 procedures per year. This stability suggests a well-established joint replacement practice.
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.
Questions to Ask Your Surgeon Before Joint ReplacementA practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
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.
Outpatient Joint Replacement: A Medicare GuideHow outpatient joint replacement works under Medicare, including eligibility criteria, cost differences, and what to expect with same-day discharge.
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. Xenos
How does Dr. Xenos's procedure volume compare to other Colorado surgeons?
Dr. Xenos has performed 121 Medicare-verified joint replacement procedures. This is significantly above the Colorado average of 64 procedures per surgeon. Dr. Xenos ranks #21 out of 169 orthopedic surgeons in Colorado.
What types of joint replacement does Dr. Xenos perform?
Dr. Xenos's Medicare data shows procedures in knee replacement (75 cases) and hip replacement (46 cases).
How experienced is Dr. Xenos with knee replacement surgery?
Dr. Xenos ranks #18 in Colorado for knee replacement with 75 Medicare-verified procedures. This high ranking among 169 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Xenos in Lone Tree?
Yes. There are 7 orthopedic surgeons in Lone Tree 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 Colorado surgeons.
What does the Medicare data for Dr. Xenos 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. Xenos's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 121 procedures shown here.
Has Dr. Xenos's procedure volume changed over time?
Dr. Xenos's procedure volume has been relatively stable over 12 years of Medicare data, ranging from 109 to 183 procedures per year between 2013 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.
Does Dr. Xenos perform more than one type of joint replacement?
Yes. Dr. Xenos's Medicare data shows procedures in knee replacement (75 cases), hip replacement (46 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Xenos affiliated with?
According to CMS facility affiliation data, Dr. Xenos is affiliated with Hca Healthone Sky Ridge, Arkansas Valley Regional Medical Center.
How does Dr. Xenos compare to other orthopedic surgeons in Lone Tree?
Among the 7 orthopedic surgeons in Lone Tree, Dr. Xenos ranks #1 by total Medicare procedure volume. Dr. Xenos has the highest verified Medicare volume in the city.
What are the quality ratings for hospitals where Dr. Xenos practices?
Hca Healthone Sky Ridge (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 Lone Tree, Colorado
Dr. Xenos's 121 Medicare procedures are above the Lone Tree average of 59. The table below compares verified procedure volumes for orthopedic surgeons practicing in Lone Tree.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. David Loucks | 112 | Hip, Knee |
| Dr. Robert Greenhow | 96 | Hip, Knee |
| Dr. Mark Fitzgerald | 28 | Shoulder |
| Dr. Christopher Joyce | 24 | Shoulder |
| Dr. Scott Koenig | 22 | Hip |
| Dr. Edward Szuszczewicz | 13 | Hip |
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.