Dr. Carl Deirmengian, MD
Contact & Location
267-339-3558
Limerick, PA 19468
Wynnewood, PA 19096
Dr. Deirmengian performs more knee replacement procedures than 95% of orthopedic surgeons in Pennsylvania, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #15 of 308 ranked knee surgeons in Pennsylvania.
About Dr. Deirmengian
Dr. Carl Deirmengian is a board-certified orthopedic surgeon practicing in Limerick, Pennsylvania. A Medicare provider since 2006, Dr. Deirmengian performed 131 Medicare-verified knee replacements (#15 in Pennsylvania) and 59 hip replacements in the latest annual CMS data, for a combined total of 190 procedures.
In Pennsylvania, Dr. Deirmengian performs well above the state average in knee (131 vs 47), above the state average in hip (59 vs 37).
Dr. Deirmengian's reported Medicare volume is split between knee replacements (131 cases) and hip replacements (59 cases).
Limerick is home to 2 orthopedic surgeons in the current Medicare dataset. Patients in the Limerick area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Deirmengian's Medicare record spans 12 years from 2013 through 2024. Procedure volume has remained consistent during that period, ranging from 156 to 243 procedures per year, reflecting a steady joint replacement practice.
Among 6,599 knee replacement surgeons tracked nationally, Dr. Deirmengian's 131 verified procedures is more than 2x the national average of 45.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 89 | 112 |
| 2014 | 81 | 128 |
| 2015 | 97 | 146 |
| 2016 | 71 | 114 |
| 2017 | 74 | 135 |
| 2018 | 78 | 144 |
| 2019 | 65 | 158 |
| 2020 | 55 | 106 |
| 2021 | 65 | 123 |
| 2022 | 64 | 111 |
| 2023 | 51 | 105 |
| 2024 | 59 | 131 |
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. Deirmengian Compares
Procedure volume compared to the Pennsylvania state average.
Volume Trend Analysis
Dr. Deirmengian's procedure volume has been consistent across 12 years of Medicare data, ranging from 156 to 243 procedures per year. This stability suggests a well-established joint replacement practice.
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. Deirmengian
How does Dr. Deirmengian's procedure volume compare to other Pennsylvania surgeons?
Dr. Deirmengian has performed 190 Medicare-verified joint replacement procedures. This is more than 2x the Pennsylvania average of 66 procedures per surgeon. Dr. Deirmengian ranks #25 out of 376 orthopedic surgeons in Pennsylvania.
What types of joint replacement does Dr. Deirmengian perform?
Dr. Deirmengian's Medicare data shows procedures in knee replacement (131 cases) and hip replacement (59 cases).
How experienced is Dr. Deirmengian with knee replacement surgery?
Dr. Deirmengian ranks #15 in Pennsylvania for knee replacement with 131 Medicare-verified procedures. This high ranking among 376 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Deirmengian in Limerick?
Yes. There are 2 orthopedic surgeons in Limerick 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 Pennsylvania surgeons.
What does the Medicare data for Dr. Deirmengian 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. Deirmengian's total volume across all insurers at roughly 650 to 810 procedures against the 190 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. Deirmengian's procedure volume changed over time?
Dr. Deirmengian's procedure volume has been relatively stable over 12 years of Medicare data, ranging from 156 to 243 procedures per year between 2013 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.
Does Dr. Deirmengian perform more than one type of joint replacement?
Yes. Dr. Deirmengian's Medicare data shows procedures in knee replacement (131 cases), hip replacement (59 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Deirmengian affiliated with?
According to CMS facility affiliation data, Dr. Deirmengian is affiliated with Physician'S Care Surgical Hospital, Riddle Memorial Hospital, Bryn Mawr Hospital, The, Lankenau Medical Center.
What are the quality ratings for hospitals where Dr. Deirmengian practices?
Physician'S Care Surgical Hospital (hip/knee complication rate better than national average); Riddle Memorial Hospital (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Bryn Mawr Hospital, The (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 Limerick, Pennsylvania
Dr. Deirmengian's 190 Medicare procedures are above the Limerick average of 117. The table below compares verified procedure volumes for orthopedic surgeons practicing in Limerick.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Donald Mazur | 44 | 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.