Dr. David Rojer, M.D.
Contact & Location
908-486-1111
Linden, NJ 07036
Dr. Rojer performs more knee replacement procedures than 10% of orthopedic surgeons in New Jersey, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #125 of 140 ranked knee surgeons in New Jersey.
About Dr. Rojer
Practice. Dr. David Rojer is a board-certified orthopedic surgeon practicing in Linden, New Jersey. The latest annual CMS data records 14 knee replacements and 11 hip replacements, 25 procedures in all. That is #125 in New Jersey for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 9 years. Volume peaked at 91 in 2015 and stands at 25 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 14 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Linden has 3 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 | 26 | 33 |
| 2014 | 23 | 37 |
| 2015 | 32 | 59 |
| 2016 | 31 | 49 |
| 2017 | 13 | 38 |
| 2018 | 25 | 34 |
| 2019 | 18 | 17 |
| 2020 | 0 | 0 |
| 2021 | 0 | 12 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 11 | 14 |
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. Rojer Compares
Procedure volume compared to the New Jersey state average.
Volume Trend Analysis
Dr. Rojer's recorded volume peaked at 91 procedures in 2015 and stood at 25 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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. Rojer
How does Dr. Rojer's procedure volume compare to other New Jersey surgeons?
Dr. Rojer has performed 25 Medicare-verified joint replacement procedures. The New Jersey average is 72 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Rojer ranks #129 out of 184 orthopedic surgeons in New Jersey.
What types of joint replacement does Dr. Rojer perform?
Dr. Rojer's Medicare data shows procedures in knee replacement (14 cases) and hip replacement (11 cases).
Are there other orthopedic surgeons near Dr. Rojer in Linden?
Yes. There are 3 orthopedic surgeons in Linden 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. Rojer 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. Rojer's total volume across all insurers at roughly 80 to 100 procedures against the 25 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. Rojer's procedure volume changed over time?
Dr. Rojer's Medicare-recorded volume peaked at 91 procedures in 2015 and was 25 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.
Does Dr. Rojer perform more than one type of joint replacement?
Yes. Dr. Rojer's Medicare data shows procedures in knee replacement (14 cases), hip replacement (11 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Rojer affiliated with?
According to CMS facility affiliation data, Dr. Rojer is affiliated with Robert Wood Johnson University Hospital At Rahway, St Joseph'S University Medical Center Inc, Overlook Medical Center, Trinitas Regional Medical Center.
How does Dr. Rojer compare to other orthopedic surgeons in Linden?
Among the 3 orthopedic surgeons in Linden, Dr. Rojer ranks #2 by total Medicare procedure volume. Dr. Rojer is among the highest-volume surgeons in Linden.
What are the quality ratings for hospitals where Dr. Rojer practices?
Robert Wood Johnson University Hospital At Rahway (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); St Joseph'S University Medical Center Inc (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Overlook Medical Center (4 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 Linden, New Jersey
Dr. Rojer's 25 Medicare procedures are above the Linden average of 24. The table below compares verified procedure volumes for orthopedic surgeons practicing in Linden.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Mark Ghobrial | 30 | Knee |
| Dr. Mina Abdelshahed | 16 | Shoulder |
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.