Dr. James Chen, M.D.
Dr. James Chen is a board-certified orthopedic surgeon practicing in Mission Viejo, California. A Medicare provider since 2015, Dr. Chen has performed 38 Medicare-verified hip replacements (#115 in California) and 35 knee replacements, for a combined total of 73 procedures.
In California, Dr. Chen performs near average in hip (38 vs 41 avg), below average in knee (35 vs 45 avg).
Dr. Chen's reported Medicare volume is split between hip replacements (38 cases) and knee replacements (35 cases).
Mission Viejo is home to 4 orthopedic surgeons in the current Medicare dataset. Patients in the Mission Viejo area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Chen first appears in the Medicare dataset in 2022. With 2 years of recorded data, the longitudinal trend is still developing.
Among 4,526 hip replacement surgeons tracked nationally, Dr. Chen's 38 verified procedures is near the national average of 36.
Verified Medicare Cases
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.
How Dr. Chen Compares
Procedure volume compared to the California state average.
Contact & Location
Mission Viejo, CA 92691
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Chen has 2 years of Medicare procedure data beginning in 2022. 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 Hip Replacement
If you are considering hip replacement surgery, these evidence-based guides can help you prepare and recover:
Understanding the progression from conservative treatments to surgical intervention, and how to determine when hip replacement becomes the right choice.
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.
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.
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.
Hip Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after hip replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full hip replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Chen
How does Dr. Chen's procedure volume compare to other California surgeons?
Dr. Chen has performed 73 Medicare-verified joint replacement procedures. This is in line with the California average of 65 procedures per surgeon. Dr. Chen ranks #178 out of 608 orthopedic surgeons in California.
What types of joint replacement does Dr. Chen perform?
Dr. Chen's Medicare data shows procedures in hip replacement (38 cases) and knee replacement (35 cases).
Are there other orthopedic surgeons near Dr. Chen in Mission Viejo?
Yes. There are 4 orthopedic surgeons in Mission Viejo 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. Chen represent?
The procedure counts shown are based on the most recent Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). This captures approximately 33–37% of all joint replacements performed nationally. Dr. Chen's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 73 procedures shown here.
Does Dr. Chen perform more than one type of joint replacement?
Yes. Dr. Chen's Medicare data shows procedures in hip replacement (38 cases), knee replacement (35 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Chen affiliated with?
According to CMS facility affiliation data, Dr. Chen is affiliated with Providence Mission Hospital, Hoag Memorial Hospital Presbyterian.
How does Dr. Chen compare to other orthopedic surgeons in Mission Viejo?
Among the 4 orthopedic surgeons in Mission Viejo, Dr. Chen ranks #2 by total Medicare procedure volume. Dr. Chen is among the highest-volume surgeons in Mission Viejo.
What are the quality ratings for hospitals where Dr. Chen practices?
Providence Mission Hospital (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Hoag Memorial Hospital Presbyterian (5 out of 5 CMS stars). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Mission Viejo, California
Dr. Chen's 73 Medicare procedures are below the Mission Viejo average of 91. The table below compares verified procedure volumes for orthopedic surgeons practicing in Mission Viejo.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Samuel Park | 167 | Hip, Knee |
| Dr. Michael Marandola | 64 | Hip, Knee |
| Dr. Stephen Gardner | 60 | Hip, Knee, Shoulder |
Patient Reviews & Ratings
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