Dr. Ian Duncan, MD
Dr. Ian Duncan is a board-certified orthopedic surgeon practicing in Visalia, California. A Medicare provider since 2008, Dr. Duncan has completed 74 knee replacements (#75 in California), 22 hip replacements, and 13 shoulder replacements, totaling 109 Medicare-verified procedures.
In California, Dr. Duncan performs above average in knee (74 vs 45 avg), below average in hip (22 vs 41 avg), below average in shoulder (13 vs 30 avg).
Dr. Duncan performs all three major joint replacement procedures — hip, knee, and shoulder — indicating a broad scope of orthopedic practice. The largest share is knee replacements (74 cases), followed by hip replacements (22) and shoulder replacements (13).
Beyond general orthopedic surgery, Dr. Duncan holds additional credentials in Sports Medicine, reflecting subspecialty training that may benefit patients with complex joint conditions.
Visalia is home to 9 orthopedic surgeons in the current Medicare dataset. Patients in the Visalia area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Duncan extend back to 2013, covering 11 years of data. Over that period, recorded procedure volume increased from 15 to 109 in the most recent data, a 627% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,720 knee replacement surgeons tracked nationally, Dr. Duncan's 74 verified procedures is above the national average of 45.
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. Duncan Compares
Procedure volume compared to the California state average.
Contact & Location
Visalia, CA 93277
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Duncan's Medicare-recorded procedure volume has trended upward over 11 years, increasing 627% from 15 procedures in 2013 to 109 in the most recent data.
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.
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 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. Duncan
How does Dr. Duncan's procedure volume compare to other California surgeons?
Dr. Duncan has performed 109 Medicare-verified joint replacement procedures. This is significantly above the California average of 65 procedures per surgeon. Dr. Duncan ranks #92 out of 608 orthopedic surgeons in California.
What types of joint replacement does Dr. Duncan perform?
Dr. Duncan performs all three major joint replacement procedures: knee replacement (74 cases), hip replacement (22 cases), shoulder replacement (13 cases). This breadth indicates a comprehensive orthopedic joint replacement practice.
Are there other orthopedic surgeons near Dr. Duncan in Visalia?
Yes. There are 9 orthopedic surgeons in Visalia 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. Duncan 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. Duncan's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 109 procedures shown here.
Has Dr. Duncan's procedure volume changed over time?
Yes. Dr. Duncan's Medicare-recorded volume has increased from 15 procedures in 2013 to 109 in the most recent data, a 627% increase over 11 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 109 procedures in 2023.
Does Dr. Duncan perform more than one type of joint replacement?
Yes. Dr. Duncan's Medicare data shows procedures in knee replacement (74 cases), hip replacement (22 cases), shoulder replacement (13 cases). Performing all three major joint replacements places Dr. Duncan among the 5% of orthopedic surgeons nationally who cover hip, knee, and shoulder arthroplasty.
Which hospitals is Dr. Duncan affiliated with?
According to CMS facility affiliation data, Dr. Duncan is affiliated with Kaweah Health Medical Center, Sierra View Medical Center.
How does Dr. Duncan compare to other orthopedic surgeons in Visalia?
Among the 9 orthopedic surgeons in Visalia, Dr. Duncan ranks #2 by total Medicare procedure volume. Dr. Duncan is among the highest-volume surgeons in Visalia.
What are the quality ratings for hospitals where Dr. Duncan practices?
Kaweah Health Medical Center (3 out of 5 CMS stars, hip/knee complication rate similar to national average); Sierra View Medical Center (2 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 Visalia, California
Dr. Duncan's 109 Medicare procedures are above the Visalia average of 71. The table below compares verified procedure volumes for orthopedic surgeons practicing in Visalia.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Burton Redd | 116 | Hip, Knee, Shoulder |
| Dr. Jun Kim | 79 | Hip, Knee |
| Dr. Bruce Le | 64 | Knee, Shoulder |
| Dr. Seth Criner | 47 | Knee, Shoulder |
| Dr. Frank Feng | 44 | Hip, Knee |
| Dr. Timothy Tan | 36 | Knee |
Patient Reviews & Ratings
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