Dr. Timothy Walker, M.D.
Contact & Location
Sioux Falls, SD 57104
Dr. Timothy Walker is a board-certified orthopedic surgeon practicing in Sioux Falls, South Dakota. A Medicare provider since 2005, Dr. Walker has performed 107 Medicare-verified knee replacements (#2 in South Dakota) and 46 hip replacements, for a combined total of 153 procedures.
In South Dakota, Dr. Walker performs well above average in knee (107 vs 42 avg), above average in hip (46 vs 36 avg).
Dr. Walker's reported Medicare volume is split between knee replacements (107 cases) and hip replacements (46 cases).
Sioux Falls is home to 22 orthopedic surgeons in the current Medicare dataset. Patients in the Sioux Falls area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs. Dr. Walker also maintains hospital privileges in SD and MN, indicating a regional practice that extends beyond South Dakota.
Medicare records for Dr. Walker extend back to 2013, covering 12 years of data. Over that period, recorded procedure volume increased from 101 to 153 in the most recent data, a 51% increase. This sustained growth reflects an expanding joint replacement practice.
Among 6,599 knee replacement surgeons tracked nationally, Dr. Walker's 107 verified procedures is more than 2x the national average of 45.
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. Walker Compares
Procedure volume compared to the South Dakota state average.
Volume Trend Analysis
Dr. Walker's Medicare-recorded procedure volume has trended upward over 12 years, increasing 51% from 101 procedures in 2013 to 153 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.
Prehabilitation: Preparing Your Body for SurgeryEvidence-based exercises and lifestyle adjustments that can improve surgical outcomes and speed recovery when started weeks before your procedure.
Pain Management After Joint ReplacementA comprehensive guide to managing post-surgical pain through medication, physical therapy, cold therapy, and non-pharmacological strategies.
Medicare Bundled Payment Programs for Joint ReplacementHow bundled payment models affect your joint replacement costs and care coordination, and what it means for hospital and surgeon selection.
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. Walker
How does Dr. Walker's procedure volume compare to other South Dakota surgeons?
Dr. Walker has performed 153 Medicare-verified joint replacement procedures. This is more than 2x the South Dakota average of 70 procedures per surgeon. Dr. Walker ranks #4 out of 52 orthopedic surgeons in South Dakota.
What types of joint replacement does Dr. Walker perform?
Dr. Walker's Medicare data shows procedures in knee replacement (107 cases) and hip replacement (46 cases).
How experienced is Dr. Walker with knee replacement surgery?
Dr. Walker ranks #2 in South Dakota for knee replacement with 107 Medicare-verified procedures. This high ranking among 52 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Walker in Sioux Falls?
Yes. There are 22 orthopedic surgeons in Sioux Falls 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. Walker 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. Walker's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 153 procedures shown here.
Has Dr. Walker's procedure volume changed over time?
Yes. Dr. Walker's Medicare-recorded volume has increased from 101 procedures in 2013 to 153 in the most recent data, a 51% increase over 12 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 219 procedures in 2021.
Does Dr. Walker perform more than one type of joint replacement?
Yes. Dr. Walker's Medicare data shows procedures in knee replacement (107 cases), hip replacement (46 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Walker affiliated with?
According to CMS facility affiliation data, Dr. Walker is affiliated with Sioux Falls Specialty Hospital Llp, Sanford Usd Medical Center, Avera Mckennan Hospital & University Health Center, Hendricks Community Hospital, Madison Regional Health System. Dr. Walker maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
How does Dr. Walker compare to other orthopedic surgeons in Sioux Falls?
Among the 22 orthopedic surgeons in Sioux Falls, Dr. Walker ranks #4 by total Medicare procedure volume. The highest-volume surgeon in Sioux Falls has 340 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Walker practices?
Sioux Falls Specialty Hospital Llp (hip/knee complication rate similar to national average); Sanford Usd Medical Center (4 out of 5 CMS stars, hip/knee complication rate similar to national average); Avera Mckennan Hospital & University Health 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 Sioux Falls, South Dakota
Dr. Walker's 153 Medicare procedures are below the Sioux Falls average of 167. The table below compares verified procedure volumes for orthopedic surgeons practicing in Sioux Falls.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Michael Adler | 340 | Hip, Knee |
| Dr. Corey Rothrock | 209 | Hip, Knee |
| Dr. Travis Liddell | 157 | Hip, Knee, Shoulder |
| Dr. Carl Bechtold | 122 | Hip, Knee |
| Dr. Joshua Johnson | 97 | Hip, Knee |
| Dr. Jason Hurd | 89 | Shoulder |
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.