Hip
Dr. Robert Kollmorgen, D.O.
Dr. Robert Kollmorgen is a board-certified orthopedic surgeon practicing in Clovis, California. A Medicare provider since 2009, Dr. Kollmorgen has performed 63 Medicare-verified hip replacements, ranking #51 in California.
In California, Dr. Kollmorgen performs above average in hip (63 vs 41 avg).
Dr. Kollmorgen's Medicare data shows a focused hip replacement practice with 63 verified procedures. Surgeons who concentrate on a single procedure type often develop deep procedural expertise, though total practice volume may include additional procedures not captured in Medicare fee-for-service data.
Beyond general orthopedic surgery, Dr. Kollmorgen holds additional credentials in Adult Reconstructive Orthopaedic Surgery and Sports Medicine, reflecting subspecialty training that may benefit patients with complex joint conditions.
Clovis is home to 5 orthopedic surgeons in the current Medicare dataset. Patients in the Clovis area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Kollmorgen extend back to 2018, covering 6 years of data. Over that period, recorded procedure volume increased from 18 to 63 in the most recent data, a 250% increase. This sustained growth reflects an expanding joint replacement practice.
Among 4,526 hip replacement surgeons tracked nationally, Dr. Kollmorgen's 63 verified procedures is above 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. Kollmorgen Compares
Procedure volume compared to the California state average.
Contact & Location
Clovis, CA 93611
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Kollmorgen's Medicare-recorded procedure volume has trended upward over 6 years, increasing 250% from 18 procedures in 2018 to 63 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 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.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
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. Kollmorgen
How does Dr. Kollmorgen's procedure volume compare to other California surgeons?
Dr. Kollmorgen has performed 63 Medicare-verified joint replacement procedures. This is in line with the California average of 65 procedures per surgeon. Dr. Kollmorgen ranks #206 out of 608 orthopedic surgeons in California.
What types of joint replacement does Dr. Kollmorgen perform?
Dr. Kollmorgen's reported Medicare volume is focused on hip replacement, with 63 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Kollmorgen in Clovis?
Yes. There are 5 orthopedic surgeons in Clovis 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. Kollmorgen 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. Kollmorgen's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 63 procedures shown here.
Has Dr. Kollmorgen's procedure volume changed over time?
Yes. Dr. Kollmorgen's Medicare-recorded volume has increased from 18 procedures in 2018 to 63 in the most recent data, a 250% increase over 6 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 63 procedures in 2023.
Which hospitals is Dr. Kollmorgen affiliated with?
According to CMS facility affiliation data, Dr. Kollmorgen is affiliated with Clovis Community Medical Center.
How does Dr. Kollmorgen compare to other orthopedic surgeons in Clovis?
Among the 5 orthopedic surgeons in Clovis, Dr. Kollmorgen ranks #2 by total Medicare procedure volume. Dr. Kollmorgen is among the highest-volume surgeons in Clovis.
What are the quality ratings for hospitals where Dr. Kollmorgen practices?
Clovis Community 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 Clovis, California
Dr. Kollmorgen's 63 Medicare procedures are above the Clovis average of 53. The table below compares verified procedure volumes for orthopedic surgeons practicing in Clovis.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Raj Amin | 87 | Hip, Knee |
| Dr. Arbi Nazarian | 57 | Hip, Knee |
| Dr. Geoffrey Rohlfing | 41 | Hip, Knee |
| Dr. Spencer Woolwine | 18 | Knee |
Patient Reviews & Ratings
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