Dr. Sean Griffiths, D.O.
Contact & Location
925-939-8585
Walnut Creek, CA 94598
Oakland, CA 94611
Dr. Griffiths performs more knee replacement procedures than 81% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #93 of 491 ranked knee surgeons in California.
About Dr. Griffiths
Practice. Dr. Sean Griffiths is a board-certified orthopedic surgeon practicing in Walnut Creek, California. The latest annual CMS data records 69 knee replacements and 55 hip replacements, 124 procedures in all. That is #93 in California for knee replacement. A Medicare provider since 2016.
Trend. Dr. Griffiths first appears in the Medicare data in 2023. With 2 years on record, the trend is still short.
National context. Among 6,612 knee replacement surgeons tracked nationally, 69 procedures is above the national average of 45.
Local context. Walnut Creek has 6 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume
Verified Medicare data is available for 2 years: 90 procedures in 2023 and 124 procedures in the most recent reporting year. A multi-year trend chart is shown once at least 3 years of data are available.
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. Griffiths Compares
Procedure volume compared to the California state average.
Volume Trend Analysis
Dr. Griffiths has 2 years of Medicare procedure data beginning in 2023. Additional years of data will provide a clearer picture of volume trends.
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.
Questions to Ask Your Surgeon Before Joint ReplacementA practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
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.
Outpatient Joint Replacement: A Medicare GuideHow outpatient joint replacement works under Medicare, including eligibility criteria, cost differences, and what to expect with same-day discharge.
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. Griffiths
How does Dr. Griffiths's procedure volume compare to other California surgeons?
Dr. Griffiths has performed 124 Medicare-verified joint replacement procedures. This is significantly above the California average of 68 procedures per surgeon. Dr. Griffiths ranks #89 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Griffiths perform?
Dr. Griffiths's Medicare data shows procedures in knee replacement (69 cases) and hip replacement (55 cases).
Are there other orthopedic surgeons near Dr. Griffiths in Walnut Creek?
Yes. There are 6 orthopedic surgeons in Walnut Creek 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. Griffiths 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. Griffiths's total volume across all insurers at roughly 410 to 520 procedures against the 124 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.
Does Dr. Griffiths perform more than one type of joint replacement?
Yes. Dr. Griffiths's Medicare data shows procedures in knee replacement (69 cases), hip replacement (55 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Griffiths affiliated with?
According to CMS facility affiliation data, Dr. Griffiths is affiliated with John Muir Medical Center - Walnut Creek Campus, Alta Bates Summit Medical Center, John Muir Medical Center - Concord Campus, Alta Bates Summit Medical Center - Alta Bates Camp.
How does Dr. Griffiths compare to other orthopedic surgeons in Walnut Creek?
Among the 6 orthopedic surgeons in Walnut Creek, Dr. Griffiths ranks #3 by total Medicare procedure volume. Dr. Griffiths is among the highest-volume surgeons in Walnut Creek.
What are the quality ratings for hospitals where Dr. Griffiths practices?
John Muir Medical Center - Walnut Creek Campus (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Alta Bates Summit Medical Center (5 out of 5 CMS stars, hip/knee complication rate similar to national average); John Muir Medical Center - Concord Campus (4 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 Walnut Creek, California
Dr. Griffiths's 124 Medicare procedures are below the Walnut Creek average of 136. The table below compares verified procedure volumes for orthopedic surgeons practicing in Walnut Creek.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Wendy Wong | 249 | Hip, Knee |
| Dr. Louay Toma | 206 | Hip, Knee |
| Dr. Craig Wiseman | 102 | Knee, Shoulder |
| Dr. John Kronick | 101 | Hip, Knee |
| Dr. William Workman | 32 | 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.