Dr. Bert Callahan, M.D.
Contact & Location
920-324-6802
Waupun, WI 53963
Ripon, WI 54971
Dr. Callahan performs more knee replacement procedures than 65% of orthopedic surgeons in Wisconsin, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #53 of 152 ranked knee surgeons in Wisconsin.
About Dr. Callahan
Practice. Dr. Bert Callahan is a board-certified orthopedic surgeon practicing in Waupun, Wisconsin. The latest annual CMS data records 36 knee replacements and 13 shoulder replacements, 49 procedures in all. That is #53 in Wisconsin for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume has held between 12 and 76 procedures a year.
National context. Among 6,612 knee replacement surgeons tracked nationally, 36 procedures is near the national average of 45.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement | Shoulder Replacement |
|---|---|---|---|
| 2013 | 16 | 27 | 0 |
| 2014 | 23 | 43 | 0 |
| 2015 | 27 | 49 | 0 |
| 2016 | 14 | 23 | 0 |
| 2017 | 0 | 12 | 0 |
| 2018 | 0 | 16 | 0 |
| 2019 | 0 | 23 | 0 |
| 2020 | 0 | 27 | 0 |
| 2021 | 0 | 24 | 0 |
| 2022 | 0 | 22 | 0 |
| 2023 | 20 | 32 | 0 |
| 2024 | 0 | 36 | 13 |
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, 29% to 37% for shoulder 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. Callahan Compares
Procedure volume compared to the Wisconsin state average.
Volume Trend Analysis
Dr. Callahan's procedure volume has been consistent across 12 years of Medicare data, ranging from 12 to 76 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.
What to Expect on the Day of SurgeryA step-by-step walkthrough of your surgical day, from pre-op preparation through anesthesia, the procedure itself, and the first hours of recovery.
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.
Medicare Coverage for Joint ReplacementWhat Medicare Part A and Part B cover for joint replacement surgery, including hospital stays, surgeon fees, anesthesia, and physical therapy.
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. Callahan
How does Dr. Callahan's procedure volume compare to other Wisconsin surgeons?
Dr. Callahan has performed 49 Medicare-verified joint replacement procedures. This is in line with the Wisconsin average of 51 procedures per surgeon. Dr. Callahan ranks #83 out of 189 orthopedic surgeons in Wisconsin.
What types of joint replacement does Dr. Callahan perform?
Dr. Callahan's Medicare data shows procedures in knee replacement (36 cases) and shoulder replacement (13 cases).
Where is Dr. Callahan's practice located?
Dr. Callahan practices in Waupun, Wisconsin. The office is located at 608 W Brown St, Waupun, WI 53963. Patients in the surrounding area can consult Dr. Callahan for joint replacement evaluation.
What does the Medicare data for Dr. Callahan 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, 29% to 37% for shoulder replacement, which puts Dr. Callahan's total volume across all insurers at roughly 160 to 200 procedures against the 49 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. Callahan's procedure volume changed over time?
Dr. Callahan's procedure volume has been relatively stable over 12 years of Medicare data, ranging from 12 to 76 procedures per year between 2013 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.
Does Dr. Callahan perform more than one type of joint replacement?
Yes. Dr. Callahan's Medicare data shows procedures in knee replacement (36 cases), shoulder replacement (13 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Callahan affiliated with?
According to CMS facility affiliation data, Dr. Callahan is affiliated with Ssm Health Waupun Memorial Hospital, Ssm Health St Agnes Hospital-Fond Du Lac, Prairie Ridge Health, Ssm Health Ripon Community Hospital.
What are the quality ratings for hospitals where Dr. Callahan practices?
Ssm Health Waupun Memorial Hospital (insufficient case volume for complication rate comparison); Ssm Health St Agnes Hospital-Fond Du Lac (4 out of 5 CMS stars, insufficient case volume for complication rate comparison); Prairie Ridge Health (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.