Dr. David Hennessy, M.D.
Dr. David Hennessy is a board-certified orthopedic surgeon practicing in Madison, Wisconsin. Dr. Hennessy has performed 111 Medicare-verified knee replacements (#5 in Wisconsin) and 93 hip replacements, for a combined total of 204 procedures.
In Wisconsin, Dr. Hennessy performs well above average in knee (111 vs 37 avg), well above average in hip (93 vs 29 avg).
Dr. Hennessy's reported Medicare volume is split between knee replacements (111 cases) and hip replacements (93 cases).
Madison is home to 17 orthopedic surgeons in the current Medicare dataset. Patients in the Madison area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Hennessy extend back to 2017, covering 7 years of data. Over that period, recorded procedure volume increased from 53 to 204 in the most recent data, a 285% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,720 knee replacement surgeons tracked nationally, Dr. Hennessy's 111 verified procedures is more than 2x the national average of 45.
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. Hennessy Compares
Procedure volume compared to the Wisconsin state average.
Contact & Location
Madison, WI 53718
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Hennessy's Medicare-recorded procedure volume has trended upward over 7 years, increasing 285% from 53 procedures in 2017 to 204 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.
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 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. Hennessy
How does Dr. Hennessy's procedure volume compare to other Wisconsin surgeons?
Dr. Hennessy has performed 204 Medicare-verified joint replacement procedures. This is more than 3x the Wisconsin average of 52 procedures per surgeon. Dr. Hennessy ranks #3 out of 185 orthopedic surgeons in Wisconsin.
What types of joint replacement does Dr. Hennessy perform?
Dr. Hennessy's Medicare data shows procedures in knee replacement (111 cases) and hip replacement (93 cases).
How experienced is Dr. Hennessy with knee replacement surgery?
Dr. Hennessy ranks #5 in Wisconsin for knee replacement with 111 Medicare-verified procedures. This high ranking among 185 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Hennessy in Madison?
Yes. There are 17 orthopedic surgeons in Madison 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 Wisconsin surgeons.
What does the Medicare data for Dr. Hennessy 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. Hennessy's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 204 procedures shown here.
Has Dr. Hennessy's procedure volume changed over time?
Yes. Dr. Hennessy's Medicare-recorded volume has increased from 53 procedures in 2017 to 204 in the most recent data, a 285% increase over 7 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 204 procedures in 2023.
Does Dr. Hennessy perform more than one type of joint replacement?
Yes. Dr. Hennessy's Medicare data shows procedures in knee replacement (111 cases), hip replacement (93 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Hennessy affiliated with?
According to CMS facility affiliation data, Dr. Hennessy is affiliated with University Of Wi Hospitals & Clinics Authority, Ssm Health Monroe Hospital, Fort Memorial Hospital, Unitypoint Health - Meriter.
How does Dr. Hennessy compare to other orthopedic surgeons in Madison?
Among the 17 orthopedic surgeons in Madison, Dr. Hennessy ranks #3 by total Medicare procedure volume. Dr. Hennessy is among the highest-volume surgeons in Madison.
What are the quality ratings for hospitals where Dr. Hennessy practices?
University Of Wi Hospitals & Clinics Authority (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Ssm Health Monroe Hospital (4 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 Madison, Wisconsin
Dr. Hennessy's 204 Medicare procedures are above the Madison average of 152. The table below compares verified procedure volumes for orthopedic surgeons practicing in Madison.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Brian Nickel | 235 | Hip, Knee |
| Dr. Richard Illgen | 206 | Hip, Knee |
| Dr. Scott Anderson | 137 | Hip, Knee, Shoulder |
| Dr. Brian Grogan | 114 | Shoulder |
| Dr. Andrew Livermore | 94 | Hip, Knee |
| Dr. Joseph Mitchell | 74 | Hip, Knee |
Patient Reviews & Ratings
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