Dr. Michael Parentis, M.D.
Contact & Location
716-839-5858
Williamsville, NY 14221
About Dr. Parentis
Dr. Michael Parentis is a board-certified orthopedic surgeon practicing in Williamsville, New York. A Medicare provider since 2006, Dr. Parentis performed 19 Medicare-verified knee replacements in the latest annual CMS data, ranking #206 in New York.
In New York, Dr. Parentis performs below the state average in knee (19 vs 47).
Dr. Parentis's Medicare data shows a focused knee replacement practice with 19 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 record spans 9 years from 2013 through 2024. Procedure volume has remained consistent during that period, ranging from 11 to 19 procedures per year, reflecting a steady joint replacement practice.
Dr. Parentis's 19 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)
| Year | Knee Replacement |
|---|---|
| 2013 | 17 |
| 2014 | 17 |
| 2015 | 15 |
| 2016 | 16 |
| 2017 | 16 |
| 2018 | 0 |
| 2019 | 0 |
| 2020 | 0 |
| 2021 | 14 |
| 2022 | 17 |
| 2023 | 11 |
| 2024 | 19 |
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.
Volume Trend Analysis
Dr. Parentis's procedure volume has been consistent across 9 years of Medicare data, ranging from 11 to 19 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.
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 19 Medicare-verified joint replacement procedures. The New York average is 69 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Parentis ranks #273 out of 334 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 19 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 19 procedures shown here.
Has Dr. Parentis's procedure volume changed over time?
Dr. Parentis's procedure volume has been relatively stable over 9 years of Medicare data, ranging from 11 to 19 procedures per year between 2013 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.
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 #3 by total Medicare procedure volume. Dr. Parentis is among the highest-volume surgeons in Williamsville.
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 19 Medicare procedures are above the Williamsville average of 17. The table below compares verified procedure volumes for orthopedic surgeons practicing in Williamsville.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Matthew Cavagnaro | 24 | Knee |
| Dr. Keith Stube | 19 | Knee |
| Dr. Alexander MacFarlane | 17 | Shoulder |
| Dr. Paul Lapoint | 13 | Knee |
| Dr. Paul Mason | 12 | 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.