Dr. Michael Azzoni, M.D.
Contact & Location
978-632-0383
Gardner, MA 01440
Dr. Azzoni performs more knee replacement procedures than 15% of orthopedic surgeons in Massachusetts, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #136 of 160 ranked knee surgeons in Massachusetts.
About Dr. Azzoni
Practice. Dr. Michael Azzoni is a board-certified orthopedic surgeon practicing in Gardner, Massachusetts. The latest annual CMS data records 17 knee replacements. That is #136 in Massachusetts for knee replacement. Dr. Azzoni also holds credentials in Sports Medicine. A Medicare provider since 2005.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume peaked at 51 in 2017 and stands at 17 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 17 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Gardner has 2 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 | 22 |
| 2014 | 0 | 22 |
| 2015 | 0 | 19 |
| 2016 | 12 | 22 |
| 2017 | 20 | 31 |
| 2018 | 0 | 25 |
| 2019 | 0 | 30 |
| 2020 | 0 | 19 |
| 2021 | 0 | 13 |
| 2022 | 11 | 29 |
| 2023 | 12 | 31 |
| 2024 | 0 | 17 |
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. 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. Azzoni Compares
Procedure volume compared to the Massachusetts state average.
Volume Trend Analysis
Dr. Azzoni's recorded volume peaked at 51 procedures in 2017 and stood at 17 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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. Azzoni
How does Dr. Azzoni's procedure volume compare to other Massachusetts surgeons?
Dr. Azzoni has performed 17 Medicare-verified joint replacement procedures. The Massachusetts average is 74 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Azzoni ranks #175 out of 203 orthopedic surgeons in Massachusetts.
What types of joint replacement does Dr. Azzoni perform?
Dr. Azzoni's reported Medicare volume is focused on knee replacement, with 17 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Azzoni in Gardner?
Yes. There are 2 orthopedic surgeons in Gardner 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 Massachusetts surgeons.
What does the Medicare data for Dr. Azzoni 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, which puts Dr. Azzoni's total volume across all insurers at roughly 60 to 70 procedures against the 17 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. Azzoni's procedure volume changed over time?
Dr. Azzoni's Medicare-recorded volume peaked at 51 procedures in 2017 and was 17 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.
Which hospitals is Dr. Azzoni affiliated with?
According to CMS facility affiliation data, Dr. Azzoni is affiliated with Heywood Hospital -, Athol Memorial Hospital.
What are the quality ratings for hospitals where Dr. Azzoni practices?
Heywood Hospital - (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Athol Memorial Hospital (4 out of 5 CMS stars). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Gardner, Massachusetts
Dr. Azzoni's 17 Medicare procedures are below the Gardner average of 35. The table below compares verified procedure volumes for orthopedic surgeons practicing in Gardner.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jared Toman | 52 | 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.