Dr. Nicholas Callahan, D.O.
Contact & Location
844-746-8537
Mayfield Heights, OH 44124
Mayfield Heights, OH 44124
Dr. Callahan performs more knee replacement procedures than 26% of orthopedic surgeons in Ohio, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #225 of 305 ranked knee surgeons in Ohio.
About Dr. Callahan
Practice. Dr. Nicholas Callahan is a board-certified orthopedic surgeon practicing in Mayfield Heights, Ohio. The latest annual CMS data records 19 knee replacements and 17 hip replacements, 36 procedures in all. That is #225 in Ohio for knee replacement. A Medicare provider since 2014.
Trend. Medicare records run from 2022 to 2024, 3 years. Volume peaked at 81 in 2023 and stands at 36 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 19 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Mayfield Heights has 2 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume Trends (2013-Current)
| Year | Hip Replacement | Knee Replacement | Shoulder Replacement |
|---|---|---|---|
| 2013 | 0 | 0 | 0 |
| 2014 | 0 | 0 | 0 |
| 2015 | 0 | 0 | 0 |
| 2016 | 0 | 0 | 0 |
| 2017 | 0 | 0 | 0 |
| 2018 | 0 | 0 | 0 |
| 2019 | 0 | 0 | 0 |
| 2020 | 0 | 0 | 0 |
| 2021 | 0 | 0 | 0 |
| 2022 | 13 | 0 | 0 |
| 2023 | 19 | 26 | 36 |
| 2024 | 17 | 19 | 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 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. Callahan Compares
Procedure volume compared to the Ohio state average.
Volume Trend Analysis
Dr. Callahan's recorded volume peaked at 81 procedures in 2023 and stood at 36 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.
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.
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 Ohio surgeons?
Dr. Callahan has performed 36 Medicare-verified joint replacement procedures. The Ohio average is 59 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Callahan ranks #211 out of 370 orthopedic surgeons in Ohio.
What types of joint replacement does Dr. Callahan perform?
Dr. Callahan's Medicare data shows procedures in knee replacement (19 cases) and hip replacement (17 cases).
Are there other orthopedic surgeons near Dr. Callahan in Mayfield Heights?
Yes. There are 2 orthopedic surgeons in Mayfield Heights 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 Ohio surgeons.
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, 25% to 33% for hip replacement, which puts Dr. Callahan's total volume across all insurers at roughly 120 to 150 procedures against the 36 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 Medicare-recorded volume peaked at 81 procedures in 2023 and was 36 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. Callahan perform more than one type of joint replacement?
Yes. Dr. Callahan's Medicare data shows procedures in knee replacement (19 cases), hip replacement (17 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 Southwest General Health Center, Crystal Clinic Orthopaedic Center, Lake Health, Uh Cleveland Medical Center, Cleveland Clinic.
What are the quality ratings for hospitals where Dr. Callahan practices?
Southwest General Health Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Crystal Clinic Orthopaedic Center (5 out of 5 CMS stars, hip/knee complication rate better than national average); Lake Health (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.
Other Orthopedic Surgeons in Mayfield Heights, Ohio
Dr. Callahan's 36 Medicare procedures are below the Mayfield Heights average of 47. The table below compares verified procedure volumes for orthopedic surgeons practicing in Mayfield Heights.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Louis Keppler | 58 | Hip, Knee |
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.