Dr. Gregory Sirounian, MD
Dr. Gregory Sirounian is a board-certified orthopedic surgeon practicing in Garden City, New York. A Medicare provider since 2005, Dr. Sirounian has performed 35 Medicare-verified knee replacements (#112 in New York) and 29 hip replacements, for a combined total of 64 procedures.
In New York, Dr. Sirounian performs below average in knee (35 vs 45 avg), below average in hip (29 vs 42 avg).
Dr. Sirounian's reported Medicare volume is split between knee replacements (35 cases) and hip replacements (29 cases).
Beyond general orthopedic surgery, Dr. Sirounian holds additional credentials in Adult Reconstructive Orthopaedic Surgery, reflecting subspecialty training that may benefit patients with complex joint conditions.
Garden City is home to 6 orthopedic surgeons in the current Medicare dataset. Patients in the Garden City area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Sirounian extend back to 2014, covering 10 years of data. Over that period, recorded procedure volume increased from 25 to 64 in the most recent data, a 156% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Sirounian's 35 knee replacement procedures is below the national average of 45 among 6,720 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
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. Sirounian Compares
Procedure volume compared to the New York state average.
Contact & Location
Garden City, NY 11530
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Sirounian's Medicare-recorded procedure volume has trended upward over 10 years, increasing 156% from 25 procedures in 2014 to 64 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. Sirounian
How does Dr. Sirounian's procedure volume compare to other New York surgeons?
Dr. Sirounian has performed 64 Medicare-verified joint replacement procedures. This is in line with the New York average of 67 procedures per surgeon. Dr. Sirounian ranks #117 out of 338 orthopedic surgeons in New York.
What types of joint replacement does Dr. Sirounian perform?
Dr. Sirounian's Medicare data shows procedures in knee replacement (35 cases) and hip replacement (29 cases).
Are there other orthopedic surgeons near Dr. Sirounian in Garden City?
Yes. There are 6 orthopedic surgeons in Garden City 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 York surgeons.
What does the Medicare data for Dr. Sirounian 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. Sirounian's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 64 procedures shown here.
Has Dr. Sirounian's procedure volume changed over time?
Yes. Dr. Sirounian's Medicare-recorded volume has increased from 25 procedures in 2014 to 64 in the most recent data, a 156% increase over 10 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 64 procedures in 2023.
Does Dr. Sirounian perform more than one type of joint replacement?
Yes. Dr. Sirounian's Medicare data shows procedures in knee replacement (35 cases), hip replacement (29 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Sirounian affiliated with?
According to CMS facility affiliation data, Dr. Sirounian is affiliated with Nyu Langone Hospitals.
How does Dr. Sirounian compare to other orthopedic surgeons in Garden City?
Among the 6 orthopedic surgeons in Garden City, Dr. Sirounian ranks #3 by total Medicare procedure volume. Dr. Sirounian is among the highest-volume surgeons in Garden City.
What are the quality ratings for hospitals where Dr. Sirounian practices?
Nyu Langone Hospitals (5 out of 5 CMS stars, hip/knee complication rate better than national average). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Garden City, New York
Dr. Sirounian's 64 Medicare procedures are above the Garden City average of 60. The table below compares verified procedure volumes for orthopedic surgeons practicing in Garden City.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Omid Barzideh | 101 | Hip, Knee |
| Dr. Frank Dimaio | 87 | Hip, Knee |
| Dr. Patrick Leung | 50 | Hip, Knee |
| Dr. James Capozzi | 48 | Hip, Knee |
| Dr. Randy Cohn | 12 | Knee |
Patient Reviews & Ratings
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