Dr. Greg Erens, M.D.
Contact & Location
404-778-3347
Atlanta, GA 30329
Dr. Erens performs more knee replacement procedures than 90% of orthopedic surgeons in Georgia, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #19 of 203 ranked knee surgeons in Georgia.
About Dr. Erens
Practice. Dr. Greg Erens is a board-certified orthopedic surgeon practicing in Atlanta, Georgia. The latest annual CMS data records 84 knee replacements and 51 hip replacements, 135 procedures in all. That is #19 in Georgia for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume rose from 96 procedures a year to 135, up 41%.
National context. Among 6,612 knee replacement surgeons tracked nationally, 84 procedures is above the national average of 45.
Local context. Atlanta has 30 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 | 37 | 59 |
| 2014 | 38 | 56 |
| 2015 | 47 | 60 |
| 2016 | 42 | 63 |
| 2017 | 40 | 69 |
| 2018 | 45 | 69 |
| 2019 | 51 | 71 |
| 2020 | 39 | 47 |
| 2021 | 49 | 64 |
| 2022 | 36 | 77 |
| 2023 | 46 | 90 |
| 2024 | 51 | 84 |
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. Erens Compares
Procedure volume compared to the Georgia state average.
Volume Trend Analysis
Dr. Erens's Medicare-recorded procedure volume has trended upward over 12 years, increasing 41% from 96 procedures in 2013 to 135 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. Erens
How does Dr. Erens's procedure volume compare to other Georgia surgeons?
Dr. Erens has performed 135 Medicare-verified joint replacement procedures. This is more than 2x the Georgia average of 55 procedures per surgeon. Dr. Erens ranks #17 out of 245 orthopedic surgeons in Georgia.
What types of joint replacement does Dr. Erens perform?
Dr. Erens's Medicare data shows procedures in knee replacement (84 cases) and hip replacement (51 cases).
How experienced is Dr. Erens with knee replacement surgery?
Dr. Erens ranks #19 in Georgia for knee replacement with 84 Medicare-verified procedures. This high ranking among 245 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Erens in Atlanta?
Yes. There are 30 orthopedic surgeons in Atlanta 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 Georgia surgeons.
What does the Medicare data for Dr. Erens 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. Erens's total volume across all insurers at roughly 450 to 570 procedures against the 135 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. Erens's procedure volume changed over time?
Yes. Dr. Erens's Medicare-recorded volume has increased from 96 procedures in 2013 to 135 in the most recent data, a 41% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 136 procedures in 2023.
Does Dr. Erens perform more than one type of joint replacement?
Yes. Dr. Erens's Medicare data shows procedures in knee replacement (84 cases), hip replacement (51 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Erens affiliated with?
According to CMS facility affiliation data, Dr. Erens is affiliated with Emory University Hospital.
How does Dr. Erens compare to other orthopedic surgeons in Atlanta?
Among the 30 orthopedic surgeons in Atlanta, Dr. Erens ranks #5 by total Medicare procedure volume. The highest-volume surgeon in Atlanta has 249 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Erens practices?
Emory University Hospital (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 Atlanta, Georgia
Dr. Erens's 135 Medicare procedures are below the Atlanta average of 164. The table below compares verified procedure volumes for orthopedic surgeons practicing in Atlanta.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Mark Hanna | 249 | Hip, Knee |
| Dr. Thomas Bradbury | 207 | Hip, Knee |
| Dr. Jeffrey Peretz | 182 | Hip, Knee |
| Dr. Stephen Smith | 147 | Hip, Knee |
| Dr. Oren Goltzer | 122 | Hip, Knee |
| Dr. Ajay Premkumar | 104 | 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.