Dr. John McInnis, M.D.
Contact & Location
978-369-5391
Concord, MA 01742
Dr. McInnis performs more knee replacement procedures than 1% of orthopedic surgeons in Massachusetts, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #158 of 160 ranked knee surgeons in Massachusetts.
About Dr. McInnis
Practice. Dr. John McInnis is a board-certified orthopedic surgeon practicing in Concord, Massachusetts. The latest annual CMS data records 11 knee replacements. That is #158 in Massachusetts for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume peaked at 114 in 2021 and stands at 11 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 11 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Concord has 4 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 | 20 | 50 |
| 2014 | 16 | 57 |
| 2015 | 23 | 58 |
| 2016 | 34 | 66 |
| 2017 | 39 | 64 |
| 2018 | 29 | 80 |
| 2019 | 33 | 69 |
| 2020 | 32 | 74 |
| 2021 | 27 | 87 |
| 2022 | 23 | 90 |
| 2023 | 22 | 70 |
| 2024 | 0 | 11 |
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. McInnis Compares
Procedure volume compared to the Massachusetts state average.
Volume Trend Analysis
Dr. McInnis's recorded volume peaked at 114 procedures in 2021 and stood at 11 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.
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.
Recovery Timeline: Week-by-Week ExpectationsA detailed week-by-week guide covering pain levels, mobility milestones, physical therapy progression, and when to expect a return to daily activities.
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. McInnis
How does Dr. McInnis's procedure volume compare to other Massachusetts surgeons?
Dr. McInnis has performed 11 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. McInnis ranks #199 out of 203 orthopedic surgeons in Massachusetts.
What types of joint replacement does Dr. McInnis perform?
Dr. McInnis's reported Medicare volume is focused on knee replacement, with 11 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. McInnis in Concord?
Yes. There are 4 orthopedic surgeons in Concord 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. McInnis 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. McInnis's total volume across all insurers at roughly 40 to 50 procedures against the 11 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. McInnis's procedure volume changed over time?
Dr. McInnis's Medicare-recorded volume peaked at 114 procedures in 2021 and was 11 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.
How does Dr. McInnis compare to other orthopedic surgeons in Concord?
Among the 4 orthopedic surgeons in Concord, Dr. McInnis ranks #4 by total Medicare procedure volume. The highest-volume surgeon in Concord has 129 verified Medicare procedures.
Other Orthopedic Surgeons in Concord, Massachusetts
Dr. McInnis's 11 Medicare procedures are below the Concord average of 50. The table below compares verified procedure volumes for orthopedic surgeons practicing in Concord.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Matthew Sloan | 129 | Hip, Knee |
| Dr. Paul Re | 48 | Shoulder |
| Dr. Donald Driscoll | 11 | 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.