Dr. Christopher Cox, M.D.
Contact & Location
415-592-2014
San Francisco, CA 94118
Dr. Cox performs more knee replacement procedures than 74% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #124 of 491 ranked knee surgeons in California.
About Dr. Cox
Practice. Dr. Christopher Cox is a board-certified orthopedic surgeon practicing in San Francisco, California. The latest annual CMS data records 53 knee replacements and 42 hip replacements, 95 procedures in all. That is #124 in California for knee replacement. A Medicare provider since 2006.
Trend. Medicare records run from 2013 to 2024, 12 years. Volume has held between 74 and 115 procedures a year.
National context. Among 6,612 knee replacement surgeons tracked nationally, 53 procedures is near the national average of 45.
Local context. San Francisco has 23 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 | 55 | 41 |
| 2014 | 53 | 43 |
| 2015 | 55 | 49 |
| 2016 | 40 | 57 |
| 2017 | 47 | 53 |
| 2018 | 49 | 66 |
| 2019 | 37 | 60 |
| 2020 | 23 | 51 |
| 2021 | 38 | 42 |
| 2022 | 39 | 45 |
| 2023 | 31 | 45 |
| 2024 | 42 | 53 |
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. Cox Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Cox's procedure volume has been consistent across 12 years of Medicare data, ranging from 74 to 115 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.
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.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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. Cox
How does Dr. Cox's procedure volume compare to other California surgeons?
Dr. Cox has performed 95 Medicare-verified joint replacement procedures. This is in line with the California average of 68 procedures per surgeon. Dr. Cox ranks #124 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Cox perform?
Dr. Cox's Medicare data shows procedures in knee replacement (53 cases) and hip replacement (42 cases).
Are there other orthopedic surgeons near Dr. Cox in San Francisco?
Yes. There are 23 orthopedic surgeons in San Francisco 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. Cox 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. Cox's total volume across all insurers at roughly 320 to 400 procedures against the 95 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. Cox's procedure volume changed over time?
Dr. Cox's procedure volume has been relatively stable over 12 years of Medicare data, ranging from 74 to 115 procedures per year between 2013 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.
Does Dr. Cox perform more than one type of joint replacement?
Yes. Dr. Cox's Medicare data shows procedures in knee replacement (53 cases), hip replacement (42 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Cox affiliated with?
According to CMS facility affiliation data, Dr. Cox is affiliated with California Pacific Medical Center - Mission Bernal, California Pacific Medical Center- Van Ness Campus, California Pacific Medical Ctr-Davies Campus Hosp, Sonoma Valley Hospital, Ucsf Medical Center.
How does Dr. Cox compare to other orthopedic surgeons in San Francisco?
Among the 23 orthopedic surgeons in San Francisco, Dr. Cox ranks #5 by total Medicare procedure volume. The highest-volume surgeon in San Francisco has 201 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Cox practices?
California Pacific Medical Center - Mission Bernal (4 out of 5 CMS stars, hip/knee complication rate similar to national average); California Pacific Medical Center- Van Ness Campus (3 out of 5 CMS stars); California Pacific Medical Ctr-Davies Campus Hosp (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 San Francisco, California
Dr. Cox's 95 Medicare procedures are below the San Francisco average of 137. The table below compares verified procedure volumes for orthopedic surgeons practicing in San Francisco.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jeffrey Barry | 201 | Hip, Knee |
| Dr. Derek Ward | 190 | Hip, Knee |
| Dr. Peter Callander | 177 | Hip, Knee |
| Dr. Erik Hansen | 133 | Hip, Knee |
| Dr. John Belzer | 88 | Knee, Shoulder |
| Dr. Heather Roberts | 74 | 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.