Shoulder
Dr. Andrew Assenmacher, M.D.
Dr. Andrew Assenmacher is a board-certified orthopedic surgeon practicing in Monroe, Michigan. A Medicare provider since 2009, Dr. Assenmacher has performed 22 Medicare-verified shoulder replacements, ranking #30 in Michigan.
In Michigan, Dr. Assenmacher performs near average in shoulder (22 vs 27 avg).
Dr. Assenmacher's Medicare data shows a focused shoulder replacement practice with 22 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.
Medicare records for Dr. Assenmacher extend back to 2019, covering 4 years of data. Over that period, recorded procedure volume increased from 17 to 22 in the most recent data, a 29% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Assenmacher's 22 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 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.
Contact & Location
Monroe, MI 48162
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Assenmacher's Medicare-recorded procedure volume has trended upward over 4 years, increasing 29% from 17 procedures in 2019 to 22 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.
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 22 Medicare-verified joint replacement procedures. The Michigan average is 48 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Assenmacher ranks #198 out of 272 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 22 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 22 procedures shown here.
Has Dr. Assenmacher's procedure volume changed over time?
Yes. Dr. Assenmacher's Medicare-recorded volume has increased from 17 procedures in 2019 to 22 in the most recent data, a 29% increase over 4 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 22 procedures in 2023.
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 22 Medicare procedures are below the Monroe average of 32. The table below compares verified procedure volumes for orthopedic surgeons practicing in Monroe.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Mark Zekaj | 41 | Hip, Knee |
Patient Reviews & Ratings
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