Dr. Keith Lonergan, MD
Contact & Location
Greer, SC 29650
Dr. Keith Lonergan is a board-certified orthopedic surgeon practicing in Greer, South Carolina. A Medicare provider since 2007, Dr. Lonergan has performed 27 Medicare-verified knee replacements (#86 in South Carolina) and 19 shoulder replacements, for a combined total of 46 procedures.
In South Carolina, Dr. Lonergan performs below average in knee (27 vs 58 avg), below average in shoulder (19 vs 29 avg).
Dr. Lonergan's reported Medicare volume is split between knee replacements (27 cases) and shoulder replacements (19 cases).
Greer is home to 6 orthopedic surgeons in the current Medicare dataset. Patients in the Greer area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Lonergan extend back to 2013, covering 12 years of data. Over that period, recorded procedure volume increased from 30 to 46 in the most recent data, a 53% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Lonergan's 27 knee replacement procedures is below the national average of 45 among 6,599 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.
How Dr. Lonergan Compares
Procedure volume compared to the South Carolina state average.
Volume Trend Analysis
Dr. Lonergan's Medicare-recorded procedure volume has trended upward over 12 years, increasing 53% from 30 procedures in 2013 to 46 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.
Questions to Ask Your Surgeon Before Joint ReplacementA practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
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.
Outpatient Joint Replacement: A Medicare GuideHow outpatient joint replacement works under Medicare, including eligibility criteria, cost differences, and what to expect with same-day discharge.
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. Lonergan
How does Dr. Lonergan's procedure volume compare to other South Carolina surgeons?
Dr. Lonergan has performed 46 Medicare-verified joint replacement procedures. The South Carolina average is 76 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Lonergan ranks #86 out of 158 orthopedic surgeons in South Carolina.
What types of joint replacement does Dr. Lonergan perform?
Dr. Lonergan's Medicare data shows procedures in knee replacement (27 cases) and shoulder replacement (19 cases).
Are there other orthopedic surgeons near Dr. Lonergan in Greer?
Yes. There are 6 orthopedic surgeons in Greer 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 South Carolina surgeons.
What does the Medicare data for Dr. Lonergan represent?
The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. Lonergan's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 46 procedures shown here.
Has Dr. Lonergan's procedure volume changed over time?
Yes. Dr. Lonergan's Medicare-recorded volume has increased from 30 procedures in 2013 to 46 in the most recent data, a 53% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 59 procedures in 2023.
Does Dr. Lonergan perform more than one type of joint replacement?
Yes. Dr. Lonergan's Medicare data shows procedures in knee replacement (27 cases), shoulder replacement (19 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Lonergan affiliated with?
According to CMS facility affiliation data, Dr. Lonergan is affiliated with Prisma Health Greer Memorial Hospital.
How does Dr. Lonergan compare to other orthopedic surgeons in Greer?
Among the 6 orthopedic surgeons in Greer, Dr. Lonergan ranks #5 by total Medicare procedure volume. The highest-volume surgeon in Greer has 215 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Lonergan practices?
Prisma Health Greer Memorial Hospital (5 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 Greer, South Carolina
Dr. Lonergan's 46 Medicare procedures are below the Greer average of 106. The table below compares verified procedure volumes for orthopedic surgeons practicing in Greer.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Brayton Shirley | 215 | Hip, Knee |
| Dr. Frank Armocida | 176 | Hip, Knee |
| Dr. Nathanael Adams | 98 | Hip, Knee |
| Dr. Wesley Parker | 86 | Hip, Knee |
| Dr. Thomas Leong | 13 | 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.