Dr. Kevin Ehrhart, M.D.
Contact & Location
310-829-2663
Santa Monica, CA 90404
Dr. Ehrhart performs more knee replacement procedures than 67% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #158 of 491 ranked knee surgeons in California.
About Dr. Ehrhart
Practice. Dr. Kevin Ehrhart is a board-certified orthopedic surgeon practicing in Santa Monica, California. The latest annual CMS data records 46 knee replacements. That is #158 in California for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume peaked at 84 in 2017 and stands at 46 now. Reporting changes and payer mix can both move that number.
National context. Among 6,612 knee replacement surgeons tracked nationally, 46 procedures is near the national average of 45.
Local context. Santa Monica has 11 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 |
|---|---|---|
| 2013 | 24 | 48 |
| 2014 | 20 | 32 |
| 2015 | 19 | 37 |
| 2016 | 20 | 28 |
| 2017 | 33 | 51 |
| 2018 | 18 | 49 |
| 2019 | 21 | 53 |
| 2020 | 13 | 47 |
| 2021 | 0 | 36 |
| 2022 | 0 | 29 |
| 2023 | 0 | 43 |
| 2024 | 0 | 46 |
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. 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. Ehrhart Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Ehrhart's recorded volume peaked at 84 procedures in 2017 and stood at 46 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.
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.
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.
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. Ehrhart
How does Dr. Ehrhart's procedure volume compare to other California surgeons?
Dr. Ehrhart has performed 46 Medicare-verified joint replacement procedures. The California average is 68 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Ehrhart ranks #296 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Ehrhart perform?
Dr. Ehrhart's reported Medicare volume is focused on knee replacement, with 46 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Ehrhart in Santa Monica?
Yes. There are 11 orthopedic surgeons in Santa Monica 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 California surgeons.
What does the Medicare data for Dr. Ehrhart 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, which puts Dr. Ehrhart's total volume across all insurers at roughly 160 to 200 procedures against the 46 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. Ehrhart's procedure volume changed over time?
Dr. Ehrhart's Medicare-recorded volume peaked at 84 procedures in 2017 and was 46 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. Ehrhart affiliated with?
According to CMS facility affiliation data, Dr. Ehrhart is affiliated with Saint John'S Health Center, Cedars-Sinai Medical Center.
How does Dr. Ehrhart compare to other orthopedic surgeons in Santa Monica?
Among the 11 orthopedic surgeons in Santa Monica, Dr. Ehrhart ranks #5 by total Medicare procedure volume. The highest-volume surgeon in Santa Monica has 173 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Ehrhart practices?
Saint John'S Health Center (4 out of 5 CMS stars, hip/knee complication rate better than national average); Cedars-Sinai Medical Center (5 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 Santa Monica, California
Dr. Ehrhart's 46 Medicare procedures are below the Santa Monica average of 88. The table below compares verified procedure volumes for orthopedic surgeons practicing in Santa Monica.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jeffrey Zarin | 173 | Hip, Knee |
| Dr. Umesh Bhagia | 156 | Hip, Knee, Shoulder |
| Dr. Michael Gerhardt | 105 | Hip |
| Dr. Alexandra Stavrakis | 69 | Hip, Knee |
| Dr. Ryan Bennett | 34 | Knee |
| Dr. Kevin Ilo | 33 | 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.