Dr. Benjamin Assenmacher, M.D.
Dr. Benjamin Assenmacher is a board-certified orthopedic surgeon practicing in Oregon, Ohio. Dr. Assenmacher has completed 40 knee replacements (#117 in Ohio), 24 shoulder replacements, and 17 hip replacements, totaling 81 Medicare-verified procedures.
In Ohio, Dr. Assenmacher performs near average in knee (40 vs 40 avg), near average in shoulder (24 vs 27 avg), below average in hip (17 vs 31 avg).
Dr. Assenmacher performs all three major joint replacement procedures — hip, knee, and shoulder — indicating a broad scope of orthopedic practice. The largest share is knee replacements (40 cases), followed by shoulder replacements (24) and hip replacements (17).
Oregon is home to 5 orthopedic surgeons in the current Medicare dataset. Patients in the Oregon 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 OH and MI, indicating a regional practice that extends beyond Ohio.
Medicare records for Dr. Assenmacher extend back to 2019, covering 5 years of data. Over that period, recorded procedure volume increased from 39 to 81 in the most recent data, a 108% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,720 knee replacement surgeons tracked nationally, Dr. Assenmacher's 40 verified procedures is near the national average of 45.
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 Ohio state average.
Contact & Location
Oregon, OH 43616
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Assenmacher's Medicare-recorded procedure volume has trended upward over 5 years, increasing 108% from 39 procedures in 2019 to 81 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 Knee Replacement
If you are considering knee replacement surgery, these evidence-based guides can help you prepare and recover:
An overview of current surgical approaches including robotic-assisted and minimally invasive techniques, implant options, and expected outcomes.
Questions to Ask Your Surgeon Before Joint ReplacementA practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
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.
Outpatient Joint Replacement: A Medicare GuideHow outpatient joint replacement works under Medicare, including eligibility criteria, cost differences, and what to expect with same-day discharge.
Knee Replacement Recovery Overview
Recovery timelines vary by patient, but here is a general overview of what to expect after knee replacement surgery:
Individual recovery varies based on overall health, age, and adherence to physical therapy. View full knee replacement recovery guide and product recommendations
Frequently Asked Questions About Dr. Assenmacher
How does Dr. Assenmacher's procedure volume compare to other Ohio surgeons?
Dr. Assenmacher has performed 81 Medicare-verified joint replacement procedures. This is in line with the Ohio average of 57 procedures per surgeon. Dr. Assenmacher ranks #88 out of 378 orthopedic surgeons in Ohio.
What types of joint replacement does Dr. Assenmacher perform?
Dr. Assenmacher performs all three major joint replacement procedures: knee replacement (40 cases), shoulder replacement (24 cases), hip replacement (17 cases). This breadth indicates a comprehensive orthopedic joint replacement practice.
Are there other orthopedic surgeons near Dr. Assenmacher in Oregon?
Yes. There are 5 orthopedic surgeons in Oregon 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 Ohio 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 81 procedures shown here.
Has Dr. Assenmacher's procedure volume changed over time?
Yes. Dr. Assenmacher's Medicare-recorded volume has increased from 39 procedures in 2019 to 81 in the most recent data, a 108% increase over 5 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 81 procedures in 2023.
Does Dr. Assenmacher perform more than one type of joint replacement?
Yes. Dr. Assenmacher's Medicare data shows procedures in knee replacement (40 cases), shoulder replacement (24 cases), hip replacement (17 cases). Performing all three major joint replacements places Dr. Assenmacher among the 5% of orthopedic surgeons nationally who cover hip, knee, and shoulder arthroplasty.
Which hospitals is Dr. Assenmacher affiliated with?
According to CMS facility affiliation data, Dr. Assenmacher is affiliated with Toledo Hospital The, Bay Park Community Hospital, Fulton County Health Center, Promedica Monroe Regional Hospital. Dr. Assenmacher maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
How does Dr. Assenmacher compare to other orthopedic surgeons in Oregon?
Among the 5 orthopedic surgeons in Oregon, Dr. Assenmacher ranks #2 by total Medicare procedure volume. Dr. Assenmacher is among the highest-volume surgeons in Oregon.
What are the quality ratings for hospitals where Dr. Assenmacher practices?
Toledo Hospital The (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Bay Park Community Hospital (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); Fulton County Health Center (3 out of 5 CMS stars, insufficient case volume for complication rate comparison). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Oregon, Ohio
Dr. Assenmacher's 81 Medicare procedures are above the Oregon average of 74. The table below compares verified procedure volumes for orthopedic surgeons practicing in Oregon.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Joseph Assenmacher | 142 | Hip, Knee, Shoulder |
| Dr. Craig Assenmacher | 77 | Hip, Knee, Shoulder |
| Dr. Bradley Morse | 56 | Hip, Knee |
| Dr. Enesi Momoh | 14 | Shoulder |
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