Dr. Adam Harder, M.D.
Contact & Location
978-794-1946
Andover, MA 01810
North Andover, MA 01845
Dr. Harder performs more knee replacement procedures than 44% of orthopedic surgeons in Massachusetts, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #89 of 160 ranked knee surgeons in Massachusetts.
About Dr. Harder
Practice. Dr. Adam Harder is a board-certified orthopedic surgeon practicing in Andover, Massachusetts. The latest annual CMS data records 34 knee replacements and 25 hip replacements, 59 procedures in all. That is #89 in Massachusetts for knee replacement. A Medicare provider since 2007.
Trend. Medicare records run from 2014 to 2024, 11 years. Volume rose from 14 procedures a year to 59, up 321%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 34 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Andover has 2 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist. Dr. Harder also holds hospital privileges in MA and NH, a practice that extends beyond Massachusetts.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 0 | 0 |
| 2014 | 0 | 14 |
| 2015 | 0 | 13 |
| 2016 | 11 | 17 |
| 2017 | 19 | 17 |
| 2018 | 19 | 12 |
| 2019 | 21 | 18 |
| 2020 | 14 | 21 |
| 2021 | 29 | 15 |
| 2022 | 28 | 23 |
| 2023 | 39 | 25 |
| 2024 | 25 | 34 |
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. Harder Compares
Procedure volume compared to the Massachusetts state average.
Volume Trend Analysis
Dr. Harder's Medicare-recorded procedure volume has trended upward over 11 years, increasing 321% from 14 procedures in 2014 to 59 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. Harder
How does Dr. Harder's procedure volume compare to other Massachusetts surgeons?
Dr. Harder has performed 59 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. Harder ranks #90 out of 203 orthopedic surgeons in Massachusetts.
What types of joint replacement does Dr. Harder perform?
Dr. Harder's Medicare data shows procedures in knee replacement (34 cases) and hip replacement (25 cases).
Are there other orthopedic surgeons near Dr. Harder in Andover?
Yes. There are 2 orthopedic surgeons in Andover 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. Harder 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. Harder's total volume across all insurers at roughly 200 to 250 procedures against the 59 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. Harder's procedure volume changed over time?
Yes. Dr. Harder's Medicare-recorded volume has increased from 14 procedures in 2014 to 59 in the most recent data, a 321% increase over 11 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 64 procedures in 2023.
Does Dr. Harder perform more than one type of joint replacement?
Yes. Dr. Harder's Medicare data shows procedures in knee replacement (34 cases), hip replacement (25 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Harder affiliated with?
According to CMS facility affiliation data, Dr. Harder is affiliated with Merrimack Health Lawrence Hospital, Merrimack Health Methuen Hospital, Parkland Medical Center. Dr. Harder maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
What are the quality ratings for hospitals where Dr. Harder practices?
Merrimack Health Lawrence Hospital (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Merrimack Health Methuen Hospital (2 out of 5 CMS stars, hip/knee complication rate similar to national average); Parkland Medical Center (4 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 Andover, Massachusetts
Dr. Harder's 59 Medicare procedures are above the Andover average of 48. The table below compares verified procedure volumes for orthopedic surgeons practicing in Andover.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Steven Andriola | 37 | 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.