Dr. Francis Ennis, M.D.
Contact & Location
203-869-1145
Greenwich, CT 06831
Dr. Ennis performs more knee replacement procedures than 64% of orthopedic surgeons in Connecticut, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #24 of 67 ranked knee surgeons in Connecticut.
About Dr. Ennis
Practice. Dr. Francis Ennis is a board-certified orthopedic surgeon practicing in Greenwich, Connecticut. The latest annual CMS data records 38 knee replacements and 11 hip replacements, 49 procedures in all. That is #24 in Connecticut for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume peaked at 129 in 2015 and stands at 49 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 38 procedures is near the national average of 45.
Local context. Greenwich has 9 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 | 47 | 56 |
| 2014 | 45 | 60 |
| 2015 | 61 | 68 |
| 2016 | 65 | 58 |
| 2017 | 58 | 56 |
| 2018 | 57 | 58 |
| 2019 | 36 | 72 |
| 2020 | 37 | 51 |
| 2021 | 37 | 73 |
| 2022 | 37 | 82 |
| 2023 | 20 | 80 |
| 2024 | 11 | 38 |
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. Ennis Compares
Procedure volume compared to the Connecticut state average.
Volume Trend Analysis
Dr. Ennis's recorded volume peaked at 129 procedures in 2015 and stood at 49 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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.
Prehabilitation: Preparing Your Body for SurgeryEvidence-based exercises and lifestyle adjustments that can improve surgical outcomes and speed recovery when started weeks before your procedure.
Rehabilitation Roadmap: Your Complete Recovery GuideA structured physical therapy progression from the first post-op exercises through full strength and mobility restoration over 3 to 6 months.
Medicare Bundled Payment Programs for Joint ReplacementHow bundled payment models affect your joint replacement costs and care coordination, and what it means for hospital and surgeon selection.
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. Ennis
How does Dr. Ennis's procedure volume compare to other Connecticut surgeons?
Dr. Ennis has performed 49 Medicare-verified joint replacement procedures. This is in line with the Connecticut average of 49 procedures per surgeon. Dr. Ennis ranks #38 out of 94 orthopedic surgeons in Connecticut.
What types of joint replacement does Dr. Ennis perform?
Dr. Ennis's Medicare data shows procedures in knee replacement (38 cases) and hip replacement (11 cases).
Are there other orthopedic surgeons near Dr. Ennis in Greenwich?
Yes. There are 9 orthopedic surgeons in Greenwich 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 Connecticut surgeons.
What does the Medicare data for Dr. Ennis 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. Ennis's total volume across all insurers at roughly 170 to 210 procedures against the 49 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. Ennis's procedure volume changed over time?
Dr. Ennis's Medicare-recorded volume peaked at 129 procedures in 2015 and was 49 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.
Does Dr. Ennis perform more than one type of joint replacement?
Yes. Dr. Ennis's Medicare data shows procedures in knee replacement (38 cases), hip replacement (11 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
How does Dr. Ennis compare to other orthopedic surgeons in Greenwich?
Among the 9 orthopedic surgeons in Greenwich, Dr. Ennis ranks #6 by total Medicare procedure volume. The highest-volume surgeon in Greenwich has 116 verified Medicare procedures.
Other Orthopedic Surgeons in Greenwich, Connecticut
Dr. Ennis's 49 Medicare procedures are below the Greenwich average of 73. The table below compares verified procedure volumes for orthopedic surgeons practicing in Greenwich.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jonathan Berliner | 116 | Hip, Knee |
| Dr. Michael Held | 79 | Hip, Knee |
| Dr. Kevin Choo | 78 | Hip, Knee |
| Dr. Brian Kavanagh | 73 | Hip, Knee |
| Dr. Seth Miller | 73 | Shoulder |
| Dr. Paul Sethi | 40 | 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.