Dr. Michael Harrer, M.D.
Contact & Location
800-321-9999
Marlton, NJ 08053
Sewell, NJ 08080
Dr. Harrer performs more knee replacement procedures than 84% of orthopedic surgeons in New Jersey, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #22 of 140 ranked knee surgeons in New Jersey.
About Dr. Harrer
Practice. Dr. Michael Harrer is a board-certified orthopedic surgeon practicing in Marlton, New Jersey. The latest annual CMS data records 92 knee replacements and 80 hip replacements, 172 procedures in all. That is #22 in New Jersey for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume rose from 144 procedures a year to 172, up 19%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 92 procedures is more than 2x the national average of 45.
Local context. Marlton 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 | 50 | 94 |
| 2014 | 61 | 120 |
| 2015 | 76 | 133 |
| 2016 | 81 | 138 |
| 2017 | 76 | 111 |
| 2018 | 59 | 117 |
| 2019 | 83 | 117 |
| 2020 | 53 | 86 |
| 2021 | 69 | 114 |
| 2022 | 70 | 123 |
| 2023 | 71 | 121 |
| 2024 | 80 | 92 |
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. Harrer Compares
Procedure volume compared to the New Jersey state average.
Volume Trend Analysis
Dr. Harrer's Medicare-recorded procedure volume has trended upward over 12 years, increasing 19% from 144 procedures in 2013 to 172 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.
Home Safety: Creating Your Recovery SanctuaryRoom-by-room modifications, equipment recommendations, and fall-prevention strategies to prepare your home for a safe post-surgical recovery.
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. Harrer
How does Dr. Harrer's procedure volume compare to other New Jersey surgeons?
Dr. Harrer has performed 172 Medicare-verified joint replacement procedures. This is more than 2x the New Jersey average of 72 procedures per surgeon. Dr. Harrer ranks #19 out of 184 orthopedic surgeons in New Jersey.
What types of joint replacement does Dr. Harrer perform?
Dr. Harrer's Medicare data shows procedures in knee replacement (92 cases) and hip replacement (80 cases).
Are there other orthopedic surgeons near Dr. Harrer in Marlton?
Yes. There are 2 orthopedic surgeons in Marlton 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 New Jersey surgeons.
What does the Medicare data for Dr. Harrer 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. Harrer's total volume across all insurers at roughly 570 to 720 procedures against the 172 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. Harrer's procedure volume changed over time?
Yes. Dr. Harrer's Medicare-recorded volume has increased from 144 procedures in 2013 to 172 in the most recent data, a 19% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 219 procedures in 2016.
Does Dr. Harrer perform more than one type of joint replacement?
Yes. Dr. Harrer's Medicare data shows procedures in knee replacement (92 cases), hip replacement (80 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Harrer affiliated with?
According to CMS facility affiliation data, Dr. Harrer is affiliated with Jefferson Stratford Hospital, West Jersey Hospital, Inspira Medical Center Vineland, Virtua Our Lady Of Lourdes Hospital.
What are the quality ratings for hospitals where Dr. Harrer practices?
Jefferson Stratford Hospital (2 out of 5 CMS stars, hip/knee complication rate similar to national average); West Jersey Hospital (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Inspira Medical Center Vineland (2 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 Marlton, New Jersey
Dr. Harrer's 172 Medicare procedures are below the Marlton average of 216. The table below compares verified procedure volumes for orthopedic surgeons practicing in Marlton.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. David Nazarian | 260 | 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.