Dr. Aaron Gardiner, M.D.
Dr. Aaron Gardiner is a board-certified orthopedic surgeon practicing in Newton, Massachusetts. A Medicare provider since 2007, Dr. Gardiner has performed 22 Medicare-verified hip replacements (#84 in Massachusetts) and 16 knee replacements, for a combined total of 38 procedures.
In Massachusetts, Dr. Gardiner performs below average in hip (22 vs 44 avg), below average in knee (16 vs 51 avg).
Dr. Gardiner's reported Medicare volume is split between hip replacements (22 cases) and knee replacements (16 cases).
Newton is home to 4 orthopedic surgeons in the current Medicare dataset. Patients in the Newton area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Gardiner first appears in the Medicare dataset in 2023. With 1 year of recorded data, the longitudinal trend is still developing.
Dr. Gardiner's 22 hip replacement procedures is below the national average of 36 among 4,526 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
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. Gardiner Compares
Procedure volume compared to the Massachusetts state average.
Contact & Location
Newton, MA 02462
Verified Case Volume Trends (2013-Current)
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.
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.
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. Gardiner
How does Dr. Gardiner's procedure volume compare to other Massachusetts surgeons?
Dr. Gardiner has performed 38 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. Gardiner ranks #123 out of 202 orthopedic surgeons in Massachusetts.
What types of joint replacement does Dr. Gardiner perform?
Dr. Gardiner's Medicare data shows procedures in hip replacement (22 cases) and knee replacement (16 cases).
Are there other orthopedic surgeons near Dr. Gardiner in Newton?
Yes. There are 4 orthopedic surgeons in Newton 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. Gardiner 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. Gardiner's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 38 procedures shown here.
Does Dr. Gardiner perform more than one type of joint replacement?
Yes. Dr. Gardiner's Medicare data shows procedures in hip replacement (22 cases), knee replacement (16 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Gardiner affiliated with?
According to CMS facility affiliation data, Dr. Gardiner is affiliated with Newton-Wellesley Hospital.
How does Dr. Gardiner compare to other orthopedic surgeons in Newton?
Among the 4 orthopedic surgeons in Newton, Dr. Gardiner ranks #3 by total Medicare procedure volume. Dr. Gardiner is among the highest-volume surgeons in Newton.
What are the quality ratings for hospitals where Dr. Gardiner practices?
Newton-Wellesley Hospital (5 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 Newton, Massachusetts
Dr. Gardiner's 38 Medicare procedures are below the Newton average of 65. The table below compares verified procedure volumes for orthopedic surgeons practicing in Newton.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Alfred Hanmer | 118 | Hip, Knee |
| Dr. Daniel Quinn | 93 | Hip, Knee, Shoulder |
| Dr. Laurie Katz | 11 | Knee |
Patient Reviews & Ratings
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