Dr. Michael Dersam, MD
Contact & Location
602-406-2669
Phoenix, AZ 85013
About Dr. Dersam
Dr. Michael Dersam is a board-certified orthopedic surgeon practicing in Phoenix, Arizona. A Medicare provider since 2005, Dr. Dersam performed 20 Medicare-verified shoulder replacements (#39 in Arizona) and 15 knee replacements in the latest annual CMS data, for a combined total of 35 procedures.
In Arizona, Dr. Dersam performs below the state average in shoulder (20 vs 31), below the state average in knee (15 vs 49).
Dr. Dersam's reported Medicare volume is split between shoulder replacements (20 cases) and knee replacements (15 cases).
Phoenix is home to 51 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.
Medicare records for Dr. Dersam extend back to 2019, covering 6 years of data. Over that period, recorded procedure volume increased from 30 to 35 in the most recent data, a 17% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Dersam's 20 shoulder replacement procedures is below the national average of 29 among 2,213 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
| Year | Knee Replacement | Shoulder Replacement |
|---|---|---|
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 16 | 14 |
| 2020 | 12 | 11 |
| 2021 | 0 | 14 |
| 2022 | 14 | 0 |
| 2023 | 11 | 13 |
| 2024 | 15 | 20 |
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 Medicare-recorded procedure volume has trended upward over 6 years, increasing 17% from 30 procedures in 2019 to 35 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 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 35 Medicare-verified joint replacement procedures. The Arizona average is 72 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Dersam ranks #124 out of 191 orthopedic surgeons in Arizona.
What types of joint replacement does Dr. Dersam perform?
Dr. Dersam's Medicare data shows procedures in shoulder replacement (20 cases) and knee replacement (15 cases).
Are there other orthopedic surgeons near Dr. Dersam in Phoenix?
Yes. There are 51 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 35 procedures shown here.
Has Dr. Dersam's procedure volume changed over time?
Yes. Dr. Dersam's Medicare-recorded volume has increased from 30 procedures in 2019 to 35 in the most recent data, a 17% increase over 6 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 35 procedures in 2024.
Does Dr. Dersam perform more than one type of joint replacement?
Yes. Dr. Dersam's Medicare data shows procedures in shoulder replacement (20 cases), knee replacement (15 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 51 orthopedic surgeons in Phoenix, Dr. Dersam ranks #33 by total Medicare procedure volume. The highest-volume surgeon in Phoenix has 234 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 35 Medicare procedures are below the Phoenix average of 139. The table below compares verified procedure volumes for orthopedic surgeons practicing in Phoenix.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Steven Werner | 234 | Hip, Knee |
| Dr. Christina Khoury | 152 | Hip, Knee |
| Dr. Steven Hattrup | 147 | Shoulder |
| Dr. Michael Wilmink | 144 | Hip, Knee |
| Dr. Kenneth Schmidt | 135 | Hip, Knee |
| Dr. Lige Kaplan | 128 | 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.