Dr. Kevin Cassidy, M.D.
Contact & Location
516-627-8717
Great Neck, NY 11021
Dr. Cassidy performs more knee replacement procedures than 91% of orthopedic surgeons in New York, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #23 of 269 ranked knee surgeons in New York.
About Dr. Cassidy
Practice. Dr. Kevin Cassidy is a board-certified orthopedic surgeon practicing in Great Neck, New York. The latest annual CMS data records 116 knee replacements and 68 hip replacements, 184 procedures in all. That is #23 in New York for knee replacement.
Trend. Medicare records run from 2015 to 2024, 10 years. Volume rose from 32 procedures a year to 184, up 475%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 116 procedures is more than 2x the national average of 45.
Local context. Great Neck has 14 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 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 14 | 18 |
| 2016 | 18 | 31 |
| 2017 | 26 | 39 |
| 2018 | 42 | 45 |
| 2019 | 41 | 41 |
| 2020 | 30 | 50 |
| 2021 | 36 | 59 |
| 2022 | 39 | 70 |
| 2023 | 41 | 89 |
| 2024 | 68 | 116 |
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. Cassidy Compares
Procedure volume compared to the New York state average.
Volume Trend Analysis
Dr. Cassidy's Medicare-recorded procedure volume has trended upward over 10 years, increasing 475% from 32 procedures in 2015 to 184 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.
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.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
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. Cassidy
How does Dr. Cassidy's procedure volume compare to other New York surgeons?
Dr. Cassidy has performed 184 Medicare-verified joint replacement procedures. This is more than 2x the New York average of 69 procedures per surgeon. Dr. Cassidy ranks #25 out of 334 orthopedic surgeons in New York.
What types of joint replacement does Dr. Cassidy perform?
Dr. Cassidy's Medicare data shows procedures in knee replacement (116 cases) and hip replacement (68 cases).
Are there other orthopedic surgeons near Dr. Cassidy in Great Neck?
Yes. There are 14 orthopedic surgeons in Great Neck 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 York surgeons.
What does the Medicare data for Dr. Cassidy 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. Cassidy's total volume across all insurers at roughly 620 to 780 procedures against the 184 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. Cassidy's procedure volume changed over time?
Yes. Dr. Cassidy's Medicare-recorded volume has increased from 32 procedures in 2015 to 184 in the most recent data, a 475% increase over 10 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 184 procedures in 2024.
Does Dr. Cassidy perform more than one type of joint replacement?
Yes. Dr. Cassidy's Medicare data shows procedures in knee replacement (116 cases), hip replacement (68 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Cassidy affiliated with?
According to CMS facility affiliation data, Dr. Cassidy is affiliated with St Francis Hospital, Roslyn, Long Island Jewish Medical Center, St Charles Hospital, North Shore University Hospital, Good Samaritan Hospital Medical Center.
How does Dr. Cassidy compare to other orthopedic surgeons in Great Neck?
Among the 14 orthopedic surgeons in Great Neck, Dr. Cassidy ranks #2 by total Medicare procedure volume. Dr. Cassidy is among the highest-volume surgeons in Great Neck.
What are the quality ratings for hospitals where Dr. Cassidy practices?
St Francis Hospital, Roslyn (5 out of 5 CMS stars, hip/knee complication rate similar to national average); Long Island Jewish Medical Center (3 out of 5 CMS stars, hip/knee complication rate similar to national average); St Charles Hospital (4 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 Great Neck, New York
Dr. Cassidy's 184 Medicare procedures are above the Great Neck average of 107. The table below compares verified procedure volumes for orthopedic surgeons practicing in Great Neck.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jonathan Danoff | 252 | Hip, Knee |
| Dr. Bruce Seideman | 135 | Hip, Knee |
| Dr. Scott Marwin | 57 | Hip, Knee |
| Dr. Stanley Asnis | 44 | Hip, Knee |
| Dr. Paul Enker | 42 | Hip, Knee |
| Dr. Hamid Mostafavi | 37 | 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.