Dr. Michael Dersam, MD
Contact & Location
Phoenix, AZ 85013
Dr. Michael Dersam is a board-certified orthopedic surgeon practicing in Phoenix, Arizona. A Medicare provider since 2005, Dr. Dersam has performed 13 Medicare-verified shoulder replacements (#53 in Arizona) and 11 knee replacements, for a combined total of 24 procedures.
In Arizona, Dr. Dersam performs below average in shoulder (13 vs 30 avg), below average in knee (11 vs 49 avg).
Dr. Dersam's reported Medicare volume is split between shoulder replacements (13 cases) and knee replacements (11 cases).
Phoenix is home to 53 orthopedic surgeons in the current Medicare dataset. Patients in the Phoenix area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Dersam's Medicare data spans 5 years, beginning in 2019. Volume peaked at 30 procedures in 2019 before settling at 24 in the most recent data. Changes in Medicare reporting, payer mix shifts, or practice focus adjustments can all influence year-to-year volume.
Dr. Dersam's 13 shoulder replacement procedures is below the national average of 28 among 2,092 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
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. Dersam Compares
Procedure volume compared to the Arizona state average.
Volume Trend Analysis
Dr. Dersam's recorded volume peaked at 30 procedures in 2019 and stood at 24 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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 Shoulder Replacement
If you are considering shoulder replacement surgery, these evidence-based guides can help you prepare and recover:
A 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.
Shoulder Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after shoulder replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full shoulder replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Dersam
How does Dr. Dersam's procedure volume compare to other Arizona surgeons?
Dr. Dersam has performed 24 Medicare-verified joint replacement procedures. The Arizona average is 68 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Dersam ranks #147 out of 193 orthopedic surgeons in Arizona.
What types of joint replacement does Dr. Dersam perform?
Dr. Dersam's Medicare data shows procedures in shoulder replacement (13 cases) and knee replacement (11 cases).
Are there other orthopedic surgeons near Dr. Dersam in Phoenix?
Yes. There are 53 orthopedic surgeons in Phoenix 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 Arizona surgeons.
What does the Medicare data for Dr. Dersam 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. Dersam's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 24 procedures shown here.
Has Dr. Dersam's procedure volume changed over time?
Dr. Dersam's Medicare-recorded volume peaked at 30 procedures in 2019 and was 24 in the most recent data. Volume fluctuations can reflect changes in payer mix, practice focus, or Medicare reporting rather than a change in overall surgical activity.
Does Dr. Dersam perform more than one type of joint replacement?
Yes. Dr. Dersam's Medicare data shows procedures in shoulder replacement (13 cases), knee replacement (11 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Dersam affiliated with?
According to CMS facility affiliation data, Dr. Dersam is affiliated with Yuma Regional Medical Center, Honorhealth Scottsdale Thompson Peak Med Ctr, Honorhealth Scottsdale Shea Medical Center.
How does Dr. Dersam compare to other orthopedic surgeons in Phoenix?
Among the 53 orthopedic surgeons in Phoenix, Dr. Dersam ranks #38 by total Medicare procedure volume. The highest-volume surgeon in Phoenix has 227 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Dersam practices?
Yuma Regional Medical Center (2 out of 5 CMS stars, hip/knee complication rate similar to national average); Honorhealth Scottsdale Thompson Peak Med Ctr (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Honorhealth Scottsdale Shea Medical Center (3 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 Phoenix, Arizona
Dr. Dersam's 24 Medicare procedures are below the Phoenix average of 138. The table below compares verified procedure volumes for orthopedic surgeons practicing in Phoenix.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Steven Werner | 227 | Hip, Knee |
| Dr. Steven Hattrup | 157 | Shoulder |
| Dr. Lige Kaplan | 142 | Hip, Knee |
| Dr. Michael Wilmink | 140 | Hip, Knee |
| Dr. Mark Spangehl | 138 | Hip, Knee |
| Dr. Christina Khoury | 137 | Hip, 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.