Dr. Alexander Riordan, M.D.
Contact & Location
414-570-3590
Oak Creek, WI 53154
Glendale, WI 53212
Dr. Riordan performs more hip replacement procedures than 6% of orthopedic surgeons in Wisconsin, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #106 of 113 ranked hip surgeons in Wisconsin.
About Dr. Riordan
Practice. Dr. Alexander Riordan is a board-certified orthopedic surgeon practicing in Oak Creek, Wisconsin. The latest annual CMS data records 12 hip replacements. That is #106 in Wisconsin for hip replacement. A Medicare provider since 2012.
Trend. Medicare records run from 2017 to 2024, 6 years. Volume peaked at 42 in 2018 and stands at 12 now. Reporting changes and payer mix can both move that number.
National context. Among 4,542 hip replacement surgeons tracked nationally, 12 procedures is below the national average of 36. 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 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 12 |
| 2018 | 26 | 16 |
| 2019 | 14 | 15 |
| 2020 | 0 | 0 |
| 2021 | 11 | 11 |
| 2022 | 0 | 0 |
| 2023 | 13 | 0 |
| 2024 | 12 | 0 |
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 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. Riordan Compares
Procedure volume compared to the Wisconsin state average.
Volume Trend Analysis
Dr. Riordan's recorded volume peaked at 42 procedures in 2018 and stood at 12 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 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.
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.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
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.
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. Riordan
How does Dr. Riordan's procedure volume compare to other Wisconsin surgeons?
Dr. Riordan has performed 12 Medicare-verified joint replacement procedures. The Wisconsin average is 51 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Riordan ranks #173 out of 189 orthopedic surgeons in Wisconsin.
What types of joint replacement does Dr. Riordan perform?
Dr. Riordan's reported Medicare volume is focused on hip replacement, with 12 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Where is Dr. Riordan's practice located?
Dr. Riordan practices in Oak Creek, Wisconsin. The office is located at 200 E Ryan Rd, Oak Creek, WI 53154. Patients in the surrounding area can consult Dr. Riordan for joint replacement evaluation.
What does the Medicare data for Dr. Riordan 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 25% to 33% for hip replacement, which puts Dr. Riordan's total volume across all insurers at roughly 40 to 50 procedures against the 12 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. Riordan's procedure volume changed over time?
Dr. Riordan's Medicare-recorded volume peaked at 42 procedures in 2018 and was 12 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. Riordan affiliated with?
According to CMS facility affiliation data, Dr. Riordan is affiliated with Aurora St Lukes Medical Center, Aurora West Allis Medical Center.
What are the quality ratings for hospitals where Dr. Riordan practices?
Aurora St Lukes Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Aurora West Allis Medical Center (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.
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.