Dr. Michael MacKay, M.D.
Contact & Location
865-481-2541
Oak Ridge, TN 37830
Dr. MacKay performs more knee replacement procedures than 48% of orthopedic surgeons in Tennessee, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #90 of 176 ranked knee surgeons in Tennessee.
About Dr. MacKay
Practice. Dr. Michael MacKay is a board-certified orthopedic surgeon practicing in Oak Ridge, Tennessee. The latest annual CMS data records 35 knee replacements and 26 hip replacements, 61 procedures in all. That is #90 in Tennessee for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume rose from 13 procedures a year to 61, up 369%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 35 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Oak Ridge 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 | Shoulder Replacement |
|---|---|---|---|
| 2013 | 0 | 13 | 0 |
| 2014 | 0 | 28 | 0 |
| 2015 | 0 | 15 | 0 |
| 2016 | 0 | 18 | 0 |
| 2017 | 13 | 18 | 0 |
| 2018 | 11 | 20 | 0 |
| 2019 | 16 | 26 | 12 |
| 2020 | 18 | 20 | 0 |
| 2021 | 12 | 18 | 11 |
| 2022 | 15 | 19 | 14 |
| 2023 | 13 | 41 | 0 |
| 2024 | 26 | 35 | 0 |
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. MacKay Compares
Procedure volume compared to the Tennessee state average.
Volume Trend Analysis
Dr. MacKay's Medicare-recorded procedure volume has trended upward over 12 years, increasing 369% from 13 procedures in 2013 to 61 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.
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.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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. MacKay
How does Dr. MacKay's procedure volume compare to other Tennessee surgeons?
Dr. MacKay has performed 61 Medicare-verified joint replacement procedures. This is in line with the Tennessee average of 65 procedures per surgeon. Dr. MacKay ranks #90 out of 219 orthopedic surgeons in Tennessee.
What types of joint replacement does Dr. MacKay perform?
Dr. MacKay's Medicare data shows procedures in knee replacement (35 cases) and hip replacement (26 cases).
Are there other orthopedic surgeons near Dr. MacKay in Oak Ridge?
Yes. There are 2 orthopedic surgeons in Oak Ridge 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 Tennessee surgeons.
What does the Medicare data for Dr. MacKay 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. MacKay's total volume across all insurers at roughly 200 to 260 procedures against the 61 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. MacKay's procedure volume changed over time?
Yes. Dr. MacKay's Medicare-recorded volume has increased from 13 procedures in 2013 to 61 in the most recent data, a 369% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 61 procedures in 2024.
Does Dr. MacKay perform more than one type of joint replacement?
Yes. Dr. MacKay's Medicare data shows procedures in knee replacement (35 cases), hip replacement (26 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. MacKay affiliated with?
According to CMS facility affiliation data, Dr. MacKay is affiliated with Methodist Medical Center Of Oak Ridge, Roane Medical Center, Parkwest Medical Center.
What are the quality ratings for hospitals where Dr. MacKay practices?
Methodist Medical Center Of Oak Ridge (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Roane Medical Center (4 out of 5 CMS stars, insufficient case volume for complication rate comparison); Parkwest Medical Center (3 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 Oak Ridge, Tennessee
Dr. MacKay's 61 Medicare procedures are below the Oak Ridge average of 72. The table below compares verified procedure volumes for orthopedic surgeons practicing in Oak Ridge.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Patrick Moody | 83 | 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.