Dr. Andrew Assenmacher, M.D.
Contact & Location
Monroe, MI 48162
Dr. Andrew Assenmacher is a board-certified orthopedic surgeon practicing in Monroe, Michigan. A Medicare provider since 2009, Dr. Assenmacher has performed 17 Medicare-verified shoulder replacements, ranking #35 in Michigan.
In Michigan, Dr. Assenmacher performs below average in shoulder (17 vs 28 avg).
Dr. Assenmacher's Medicare data shows a focused shoulder replacement practice with 17 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. Assenmacher holds additional credentials in Sports Medicine, reflecting subspecialty training that may benefit patients with complex joint conditions.
Monroe is home to 2 orthopedic surgeons in the current Medicare dataset. Patients in the Monroe area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs. Dr. Assenmacher also maintains hospital privileges in MI and OH, indicating a regional practice that extends beyond Michigan.
Dr. Assenmacher's Medicare record spans 5 years from 2019 through 2024. Procedure volume has remained consistent during that period, ranging from 11 to 22 procedures per year, reflecting a steady joint replacement practice.
Dr. Assenmacher's 17 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)
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. Assenmacher Compares
Procedure volume compared to the Michigan state average.
Volume Trend Analysis
Dr. Assenmacher's procedure volume has been consistent across 5 years of Medicare data, ranging from 11 to 22 procedures per year. This stability suggests a well-established joint replacement practice.
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.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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. Assenmacher
How does Dr. Assenmacher's procedure volume compare to other Michigan surgeons?
Dr. Assenmacher has performed 17 Medicare-verified joint replacement procedures. The Michigan average is 49 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Assenmacher ranks #212 out of 256 orthopedic surgeons in Michigan.
What types of joint replacement does Dr. Assenmacher perform?
Dr. Assenmacher's reported Medicare volume is focused on shoulder replacement, with 17 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Assenmacher in Monroe?
Yes. There are 2 orthopedic surgeons in Monroe 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 Michigan surgeons.
What does the Medicare data for Dr. Assenmacher 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. Assenmacher's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 17 procedures shown here.
Has Dr. Assenmacher's procedure volume changed over time?
Dr. Assenmacher's procedure volume has been relatively stable over 5 years of Medicare data, ranging from 11 to 22 procedures per year between 2019 and 2024. Consistent volume over multiple years reflects a steady joint replacement practice.
Which hospitals is Dr. Assenmacher affiliated with?
According to CMS facility affiliation data, Dr. Assenmacher is affiliated with Promedica Monroe Regional Hospital, Toledo Hospital The. Dr. Assenmacher maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
What are the quality ratings for hospitals where Dr. Assenmacher practices?
Promedica Monroe Regional Hospital (2 out of 5 CMS stars, insufficient case volume for complication rate comparison); Toledo Hospital The (4 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 Monroe, Michigan
Dr. Assenmacher's 17 Medicare procedures are below the Monroe average of 33. The table below compares verified procedure volumes for orthopedic surgeons practicing in Monroe.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Mark Zekaj | 49 | 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.