Knee
Dr. Michael Mariorenzi, MD
Dr. Michael Mariorenzi is a board-certified orthopedic surgeon practicing in Cranston, Rhode Island. Dr. Mariorenzi has performed 19 Medicare-verified knee replacements, ranking #18 in Rhode Island.
In Rhode Island, Dr. Mariorenzi performs below average in knee (19 vs 40 avg).
Dr. Mariorenzi'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.
Cranston is home to 3 orthopedic surgeons in the current Medicare dataset. Patients in the Cranston area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Mariorenzi extend back to 2021, covering 3 years of data. Over that period, recorded procedure volume increased from 11 to 19 in the most recent data, a 73% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Mariorenzi's 19 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. Mariorenzi Compares
Procedure volume compared to the Rhode Island state average.
Contact & Location
Cranston, RI 02910
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Mariorenzi's Medicare-recorded procedure volume has trended upward over 3 years, increasing 73% from 11 procedures in 2021 to 19 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.
Prehabilitation: Preparing Your Body for SurgeryEvidence-based exercises and lifestyle adjustments that can improve surgical outcomes and speed recovery when started weeks before your procedure.
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.
Medicare Bundled Payment Programs for Joint ReplacementHow bundled payment models affect your joint replacement costs and care coordination, and what it means for hospital and surgeon selection.
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. Mariorenzi
How does Dr. Mariorenzi's procedure volume compare to other Rhode Island surgeons?
Dr. Mariorenzi has performed 19 Medicare-verified joint replacement procedures. The Rhode Island average is 53 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Mariorenzi ranks #24 out of 31 orthopedic surgeons in Rhode Island.
What types of joint replacement does Dr. Mariorenzi perform?
Dr. Mariorenzi'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.
How experienced is Dr. Mariorenzi with knee replacement surgery?
Dr. Mariorenzi ranks #18 in Rhode Island for knee replacement with 19 Medicare-verified procedures. This high ranking among 31 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Mariorenzi in Cranston?
Yes. There are 3 orthopedic surgeons in Cranston 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 Rhode Island surgeons.
What does the Medicare data for Dr. Mariorenzi 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. Mariorenzi's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 19 procedures shown here.
Has Dr. Mariorenzi's procedure volume changed over time?
Yes. Dr. Mariorenzi's Medicare-recorded volume has increased from 11 procedures in 2021 to 19 in the most recent data, a 73% increase over 3 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 30 procedures in 2022.
Which hospitals is Dr. Mariorenzi affiliated with?
According to CMS facility affiliation data, Dr. Mariorenzi is affiliated with Our Lady Of Fatima Hospital.
How does Dr. Mariorenzi compare to other orthopedic surgeons in Cranston?
Among the 3 orthopedic surgeons in Cranston, Dr. Mariorenzi ranks #2 by total Medicare procedure volume. Dr. Mariorenzi is among the highest-volume surgeons in Cranston.
What are the quality ratings for hospitals where Dr. Mariorenzi practices?
Our Lady Of Fatima Hospital (4 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 Cranston, Rhode Island
Dr. Mariorenzi's 19 Medicare procedures are below the Cranston average of 28. The table below compares verified procedure volumes for orthopedic surgeons practicing in Cranston.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Sidney Migliori | 50 | Hip, Knee |
| Dr. Louis Mariorenzi | 15 | Knee |
Patient Reviews & Ratings
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