Dr. Stephen Kayiaros, M.D.
Contact & Location
609-683-7800
Princeton, NJ 08540
Dr. Kayiaros performs more hip replacement procedures than 92% of orthopedic surgeons in New Jersey, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #8 of 102 ranked hip surgeons in New Jersey.
About Dr. Kayiaros
Practice. Dr. Stephen Kayiaros is a board-certified orthopedic surgeon practicing in Princeton, New Jersey. The latest annual CMS data records 111 hip replacements and 86 knee replacements, 197 procedures in all. That is #8 in New Jersey for hip replacement. A Medicare provider since 2007.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume rose from 68 procedures a year to 197, up 190%.
National context. Among 4,542 hip replacement surgeons tracked nationally, 111 procedures is more than 3x the national average of 36. That is #106 nationally.
Local context. Princeton has 11 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 36 | 32 |
| 2014 | 76 | 34 |
| 2015 | 70 | 40 |
| 2016 | 92 | 32 |
| 2017 | 71 | 43 |
| 2018 | 98 | 52 |
| 2019 | 103 | 52 |
| 2020 | 72 | 55 |
| 2021 | 105 | 53 |
| 2022 | 109 | 83 |
| 2023 | 104 | 94 |
| 2024 | 111 | 86 |
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 25% to 33% for hip replacement, 23% to 28% for knee 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. Kayiaros Compares
Procedure volume compared to the New Jersey state average.
Volume Trend Analysis
Dr. Kayiaros's Medicare-recorded procedure volume has trended upward over 12 years, increasing 190% from 68 procedures in 2013 to 197 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.
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.
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. Kayiaros
How does Dr. Kayiaros's procedure volume compare to other New Jersey surgeons?
Dr. Kayiaros has performed 197 Medicare-verified joint replacement procedures. This is more than 2x the New Jersey average of 72 procedures per surgeon. Dr. Kayiaros ranks #17 out of 184 orthopedic surgeons in New Jersey.
What types of joint replacement does Dr. Kayiaros perform?
Dr. Kayiaros's Medicare data shows procedures in hip replacement (111 cases) and knee replacement (86 cases).
How experienced is Dr. Kayiaros with hip replacement surgery?
Dr. Kayiaros ranks #8 in New Jersey for hip replacement with 111 Medicare-verified procedures. This high ranking among 184 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Kayiaros in Princeton?
Yes. There are 11 orthopedic surgeons in Princeton 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 New Jersey surgeons.
What does the Medicare data for Dr. Kayiaros 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 25% to 33% for hip replacement, 23% to 28% for knee replacement, which puts Dr. Kayiaros's total volume across all insurers at roughly 640 to 820 procedures against the 197 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. Kayiaros's procedure volume changed over time?
Yes. Dr. Kayiaros's Medicare-recorded volume has increased from 68 procedures in 2013 to 197 in the most recent data, a 190% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 198 procedures in 2023.
Does Dr. Kayiaros perform more than one type of joint replacement?
Yes. Dr. Kayiaros's Medicare data shows procedures in hip replacement (111 cases), knee replacement (86 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Kayiaros affiliated with?
According to CMS facility affiliation data, Dr. Kayiaros is affiliated with Robert Wood Johnson University Hospital Somerset, Saint Peter'S University Hospital, Jfk University Medical Center, St Joseph'S University Medical Center Inc, Hunterdon Medical Center.
How does Dr. Kayiaros compare to other orthopedic surgeons in Princeton?
Among the 11 orthopedic surgeons in Princeton, Dr. Kayiaros ranks #3 by total Medicare procedure volume. Dr. Kayiaros is among the highest-volume surgeons in Princeton.
What are the quality ratings for hospitals where Dr. Kayiaros practices?
Robert Wood Johnson University Hospital Somerset (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Saint Peter'S University Hospital (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Jfk University Medical Center (3 out of 5 CMS stars, insufficient case volume for complication rate comparison). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Princeton, New Jersey
Dr. Kayiaros's 197 Medicare procedures are above the Princeton average of 148. The table below compares verified procedure volumes for orthopedic surgeons practicing in Princeton.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Brian Vannozzi | 271 | Hip, Knee |
| Dr. Brian Culp | 219 | Hip, Knee |
| Dr. Hari Bezwada | 165 | Hip, Knee |
| Dr. Anthony Boniello | 77 | Hip, Knee |
| Dr. Frederick Song | 70 | Shoulder |
| Dr. Mark Pressman | 40 | Hip, 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.