Dr. Stephen Sizer, D.O.
Dr. Stephen Sizer is a board-certified orthopedic surgeon practicing in Philadelphia, Pennsylvania. Dr. Sizer has performed 82 Medicare-verified hip replacements (#12 in Pennsylvania) and 79 knee replacements, for a combined total of 161 procedures.
In Pennsylvania, Dr. Sizer performs well above average in hip (82 vs 34 avg), above average in knee (79 vs 45 avg).
Dr. Sizer's reported Medicare volume is split between hip replacements (82 cases) and knee replacements (79 cases).
Philadelphia is home to 33 orthopedic surgeons in the current Medicare dataset. Patients in the Philadelphia area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Sizer extend back to 2017, covering 7 years of data. Over that period, recorded procedure volume increased from 20 to 161 in the most recent data, a 705% increase. This sustained growth reflects an expanding joint replacement practice.
Among 4,526 hip replacement surgeons tracked nationally, Dr. Sizer's 82 verified procedures is more than 2x the national average of 36.
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. Sizer Compares
Procedure volume compared to the Pennsylvania state average.
Contact & Location
Philadelphia, PA 19131
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Sizer's Medicare-recorded procedure volume has trended upward over 7 years, increasing 705% from 20 procedures in 2017 to 161 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 Hip Replacement
If you are considering hip replacement surgery, these evidence-based guides can help you prepare and recover:
Understanding the progression from conservative treatments to surgical intervention, and how to determine when hip replacement becomes the right choice.
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.
Rehabilitation Roadmap: Your Complete Recovery GuideA structured physical therapy progression from the first post-op exercises through full strength and mobility restoration over 3 to 6 months.
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.
Hip Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after hip replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full hip replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Sizer
How does Dr. Sizer's procedure volume compare to other Pennsylvania surgeons?
Dr. Sizer has performed 161 Medicare-verified joint replacement procedures. This is more than 2x the Pennsylvania average of 63 procedures per surgeon. Dr. Sizer ranks #34 out of 388 orthopedic surgeons in Pennsylvania.
What types of joint replacement does Dr. Sizer perform?
Dr. Sizer's Medicare data shows procedures in hip replacement (82 cases) and knee replacement (79 cases).
How experienced is Dr. Sizer with hip replacement surgery?
Dr. Sizer ranks #12 in Pennsylvania for hip replacement with 82 Medicare-verified procedures. This high ranking among 388 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Sizer in Philadelphia?
Yes. There are 33 orthopedic surgeons in Philadelphia 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. Sizer 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. Sizer's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 161 procedures shown here.
Has Dr. Sizer's procedure volume changed over time?
Yes. Dr. Sizer's Medicare-recorded volume has increased from 20 procedures in 2017 to 161 in the most recent data, a 705% increase over 7 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 161 procedures in 2023.
Does Dr. Sizer perform more than one type of joint replacement?
Yes. Dr. Sizer's Medicare data shows procedures in hip replacement (82 cases), knee replacement (79 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Sizer affiliated with?
According to CMS facility affiliation data, Dr. Sizer is affiliated with Lankenau Medical Center, Paoli Hospital, Bryn Mawr Hospital, The.
How does Dr. Sizer compare to other orthopedic surgeons in Philadelphia?
Among the 33 orthopedic surgeons in Philadelphia, Dr. Sizer ranks #4 by total Medicare procedure volume. The highest-volume surgeon in Philadelphia has 200 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Sizer practices?
Lankenau Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Paoli Hospital (5 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 Philadelphia, Pennsylvania
Dr. Sizer's 161 Medicare procedures are above the Philadelphia average of 159. The table below compares verified procedure volumes for orthopedic surgeons practicing in Philadelphia.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. James Purtill | 200 | Hip, Knee |
| Dr. Christopher Melnic | 181 | Hip, Knee |
| Dr. Craig Israelite | 181 | Hip, Knee |
| Dr. Charles Nelson | 137 | Hip, Knee |
| Dr. Paul Courtney | 129 | Hip, Knee |
| Dr. Robert Booth | 125 | Knee |
Patient Reviews & Ratings
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