Dr. Samuel Mortimer, MD
Dr. Samuel Mortimer is a board-certified orthopedic surgeon practicing in Rapid City, South Dakota. Dr. Mortimer has completed 94 knee replacements (#5 in South Dakota), 40 hip replacements, and 16 shoulder replacements, totaling 150 Medicare-verified procedures.
In South Dakota, Dr. Mortimer performs well above average in knee (94 vs 45 avg), near average in hip (40 vs 36 avg), below average in shoulder (16 vs 33 avg).
Dr. Mortimer performs all three major joint replacement procedures — hip, knee, and shoulder — indicating a broad scope of orthopedic practice. The largest share is knee replacements (94 cases), followed by hip replacements (40) and shoulder replacements (16).
Rapid City is home to 8 orthopedic surgeons in the current Medicare dataset. Patients in the Rapid City area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Mortimer extend back to 2013, covering 11 years of data. Over that period, recorded procedure volume increased from 36 to 150 in the most recent data, a 317% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,720 knee replacement surgeons tracked nationally, Dr. Mortimer's 94 verified procedures is more than 2x 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. Mortimer Compares
Procedure volume compared to the South Dakota state average.
Contact & Location
Rapid City, SD 57702
Verified Case Volume Trends (2013-Current)
Volume Trend Analysis
Dr. Mortimer's Medicare-recorded procedure volume has trended upward over 11 years, increasing 317% from 36 procedures in 2013 to 150 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. Mortimer
How does Dr. Mortimer's procedure volume compare to other South Dakota surgeons?
Dr. Mortimer has performed 150 Medicare-verified joint replacement procedures. This is more than 2x the South Dakota average of 72 procedures per surgeon. Dr. Mortimer ranks #5 out of 51 orthopedic surgeons in South Dakota.
What types of joint replacement does Dr. Mortimer perform?
Dr. Mortimer performs all three major joint replacement procedures: knee replacement (94 cases), hip replacement (40 cases), shoulder replacement (16 cases). This breadth indicates a comprehensive orthopedic joint replacement practice.
How experienced is Dr. Mortimer with knee replacement surgery?
Dr. Mortimer ranks #5 in South Dakota for knee replacement with 94 Medicare-verified procedures. This high ranking among 51 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Mortimer in Rapid City?
Yes. There are 8 orthopedic surgeons in Rapid City 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 South Dakota surgeons.
What does the Medicare data for Dr. Mortimer 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. Mortimer's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 150 procedures shown here.
Has Dr. Mortimer's procedure volume changed over time?
Yes. Dr. Mortimer's Medicare-recorded volume has increased from 36 procedures in 2013 to 150 in the most recent data, a 317% increase over 11 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 150 procedures in 2023.
Does Dr. Mortimer perform more than one type of joint replacement?
Yes. Dr. Mortimer's Medicare data shows procedures in knee replacement (94 cases), hip replacement (40 cases), shoulder replacement (16 cases). Performing all three major joint replacements places Dr. Mortimer among the 5% of orthopedic surgeons nationally who cover hip, knee, and shoulder arthroplasty.
Which hospitals is Dr. Mortimer affiliated with?
According to CMS facility affiliation data, Dr. Mortimer is affiliated with Black Hills Surgical Hospital Llc, Monument Health Spearfish Hospital, Monument Health Custer Hospital, Monument Health Rapid City Hospital.
How does Dr. Mortimer compare to other orthopedic surgeons in Rapid City?
Among the 8 orthopedic surgeons in Rapid City, Dr. Mortimer ranks #2 by total Medicare procedure volume. Dr. Mortimer is among the highest-volume surgeons in Rapid City.
What are the quality ratings for hospitals where Dr. Mortimer practices?
Black Hills Surgical Hospital Llc (hip/knee complication rate better than national average); Monument Health Spearfish Hospital (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 Rapid City, South Dakota
Dr. Mortimer's 150 Medicare procedures are above the Rapid City average of 87. The table below compares verified procedure volumes for orthopedic surgeons practicing in Rapid City.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Jeffrey Marrs | 190 | Hip, Knee |
| Dr. Clark Duchene | 90 | Hip, Knee, Shoulder |
| Dr. Steven Giuseffi | 85 | Hip, Knee, Shoulder |
| Dr. Michael Kadrmas | 49 | Hip, Knee |
| Dr. Lew Papendick | 27 | Knee |
| Dr. Bryan Larson | 20 | Knee |
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