Dr. Keith Rezin, M.D.
Contact & Location
815-942-4875
Morris, IL 60450
Dr. Rezin performs more knee replacement procedures than 46% of orthopedic surgeons in Illinois, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #134 of 251 ranked knee surgeons in Illinois.
About Dr. Rezin
Practice. Dr. Keith Rezin is a board-certified orthopedic surgeon practicing in Morris, Illinois. The latest annual CMS data records 35 knee replacements and 15 hip replacements, 50 procedures in all. That is #134 in Illinois for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume peaked at 105 in 2019 and stands at 50 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 35 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement |
|---|---|---|
| 2013 | 30 | 67 |
| 2014 | 28 | 68 |
| 2015 | 24 | 77 |
| 2016 | 18 | 73 |
| 2017 | 24 | 51 |
| 2018 | 28 | 69 |
| 2019 | 32 | 73 |
| 2020 | 29 | 46 |
| 2021 | 29 | 49 |
| 2022 | 34 | 53 |
| 2023 | 39 | 46 |
| 2024 | 15 | 35 |
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims are one payer stream among several, and the share they represent differs by procedure. In 2024 it was 23% to 28% for knee replacement, 25% to 33% for hip replacement. Each verified count above is divided by its own procedure's range, and the results are added, to estimate total practice volume across all payers. The verified Medicare count is the definitive, audited figure; this is a range derived from published national volume projections, not a measurement, and an individual practice can sit well outside it: how these ranges are derived, and their sources.
How Dr. Rezin Compares
Procedure volume compared to the Illinois state average.
Volume Trend Analysis
Dr. Rezin's recorded volume peaked at 105 procedures in 2019 and stood at 50 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.
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. Rezin
How does Dr. Rezin's procedure volume compare to other Illinois surgeons?
Dr. Rezin has performed 50 Medicare-verified joint replacement procedures. The Illinois average is 69 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Rezin ranks #156 out of 316 orthopedic surgeons in Illinois.
What types of joint replacement does Dr. Rezin perform?
Dr. Rezin's Medicare data shows procedures in knee replacement (35 cases) and hip replacement (15 cases).
Where is Dr. Rezin's practice located?
Dr. Rezin practices in Morris, Illinois. The office is located at 1051 W Us Route 6, Morris, IL 60450. Patients in the surrounding area can consult Dr. Rezin for joint replacement evaluation.
What does the Medicare data for Dr. Rezin represent?
The procedure counts shown are based on 2024 Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). Medicare fee-for-service is only one payer stream, and the share of national volume it represents differs by procedure. In 2024 the share was 23% to 28% for knee replacement, 25% to 33% for hip replacement, which puts Dr. Rezin's total volume across all insurers at roughly 170 to 210 procedures against the 50 verified here. Those shares are derived from published national volume projections rather than quoted from a single publication, and they are estimates with real uncertainty. The OrthoProcedures methodology page shows the full derivation, the sources, and the limits at orthoprocedures.com/data-methodology.html.
Has Dr. Rezin's procedure volume changed over time?
Dr. Rezin's Medicare-recorded volume peaked at 105 procedures in 2019 and was 50 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.
Does Dr. Rezin perform more than one type of joint replacement?
Yes. Dr. Rezin's Medicare data shows procedures in knee replacement (35 cases), hip replacement (15 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Rezin affiliated with?
According to CMS facility affiliation data, Dr. Rezin is affiliated with Morris Hospital & Healthcare Centers.
What are the quality ratings for hospitals where Dr. Rezin practices?
Morris Hospital & Healthcare Centers (3 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.
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.