Knee
Dr. Michael Parentis, M.D.
Dr. Michael Parentis is a board-certified orthopedic surgeon practicing in Williamsville, New York. A Medicare provider since 2006, Dr. Parentis has performed 11 Medicare-verified knee replacements, ranking #270 in New York.
In New York, Dr. Parentis performs below average in knee (11 vs 45 avg).
Dr. Parentis's Medicare data shows a focused knee replacement practice with 11 verified procedures. Surgeons who concentrate on a single procedure type often develop deep procedural expertise, though total practice volume may include additional procedures not captured in Medicare fee-for-service data.
Williamsville is home to 6 orthopedic surgeons in the current Medicare dataset. Patients in the Williamsville area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Parentis's Medicare data spans 8 years, beginning in 2013. Volume peaked at 17 procedures in 2013 before settling at 11 in the most recent data. Changes in Medicare reporting, payer mix shifts, or practice focus adjustments can all influence year-to-year volume.
Dr. Parentis's 11 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. Parentis Compares
Procedure volume compared to the New York state average.
Contact & Location
Williamsville, NY 14221
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Parentis's recorded volume peaked at 17 procedures in 2013 and stood at 11 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.
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.
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.
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. Parentis
How does Dr. Parentis's procedure volume compare to other New York surgeons?
Dr. Parentis has performed 11 Medicare-verified joint replacement procedures. The New York average is 67 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Parentis ranks #331 out of 338 orthopedic surgeons in New York.
What types of joint replacement does Dr. Parentis perform?
Dr. Parentis's reported Medicare volume is focused on knee replacement, with 11 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Parentis in Williamsville?
Yes. There are 6 orthopedic surgeons in Williamsville 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. Parentis 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. Parentis's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 11 procedures shown here.
Has Dr. Parentis's procedure volume changed over time?
Dr. Parentis's Medicare-recorded volume peaked at 17 procedures in 2013 and was 11 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.
Which hospitals is Dr. Parentis affiliated with?
According to CMS facility affiliation data, Dr. Parentis is affiliated with Sisters Of Charity Hospital, Kaleida Health, Mercy Hospital Of Buffalo.
How does Dr. Parentis compare to other orthopedic surgeons in Williamsville?
Among the 6 orthopedic surgeons in Williamsville, Dr. Parentis ranks #5 by total Medicare procedure volume. The highest-volume surgeon in Williamsville has 29 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Parentis practices?
Sisters Of Charity Hospital (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); Kaleida Health (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Mercy Hospital Of Buffalo (2 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 Williamsville, New York
Dr. Parentis's 11 Medicare procedures are below the Williamsville average of 16. The table below compares verified procedure volumes for orthopedic surgeons practicing in Williamsville.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Keith Stube | 29 | Knee |
| Dr. Matthew Cavagnaro | 21 | Knee |
| Dr. Paul Mason | 14 | Knee |
| Dr. Paul Lapoint | 11 | Knee |
| Dr. Thaddeus Szarzanowicz | 11 | Knee |
Patient Reviews & Ratings
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