Dr. Jennifer Van Warmerdam is a board-certified orthopedic surgeon practicing in San Francisco, California. In 2023, Dr. Van Warmerdam performed 29 Medicare-verified knee replacements (#260 in California) and 28 hip replacements, for a combined total of 57 procedures.
Dr. Van Warmerdam's 57 Medicare procedures are near the California median of 42. The state has 608 orthopedic surgeons in the current Medicare dataset. Medicare fee-for-service data captures roughly 33–37% of all joint replacements, so total surgical volume is likely higher.
Dr. Van Warmerdam's reported Medicare volume is split between knee replacements (29 cases) and hip replacements (28 cases).
San Francisco is home to 23 orthopedic surgeons in the current Medicare dataset. Patients in the San Francisco area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Verified Medicare Cases (2023)
How is this estimated?
Medicare Part B fee-for-service claims represent approximately 33–37% of all joint replacements performed nationally (source: CMS data, AJRR). This range estimates the surgeon's total practice volume across all payers. The verified Medicare count above is the definitive, audited figure.
Hospital Affiliations
Verified Case Volume Trends (2013-2023)
Frequently Asked Questions About Dr. Van Warmerdam
How does Dr. Van Warmerdam's procedure volume compare to other California surgeons?
In 2023, Dr. Van Warmerdam performed 57 Medicare-verified joint replacement procedures. This is in line with the California average of 65 procedures per surgeon. Dr. Van Warmerdam ranks #229 out of 608 orthopedic surgeons in California.
What types of joint replacement does Dr. Van Warmerdam perform?
Dr. Van Warmerdam's Medicare data shows procedures in knee replacement (29 cases) and hip replacement (28 cases).
Are there other orthopedic surgeons near Dr. Van Warmerdam 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. Van Warmerdam represent?
The procedure counts shown are based on Medicare Part B fee-for-service claims data for 2023, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. Van Warmerdam's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 57 procedures shown here.
Other Orthopedic Surgeons in San Francisco, California
Compare Dr. Van Warmerdam's volume with other surgeons practicing in San Francisco.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jeffrey Barry | 162 | Hip, Knee |
| Dr. Peter Callander | 140 | Hip, Knee |
| Dr. Derek Ward | 133 | Hip, Knee |
| Dr. Erik Hansen | 120 | Hip, Knee |
| Dr. James Kelly | 93 | Shoulder |
| Dr. Christopher Cox | 76 | Hip, Knee |
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