Dr. Diane Hillard-Sembell, M.D.
Contact & Location
Springfield, IL 62702
Dr. Diane Hillard-Sembell is a board-certified orthopedic surgeon practicing in Springfield, Illinois. A Medicare provider since 2006, Dr. Hillard-Sembell has performed 12 Medicare-verified knee replacements, ranking #247 in Illinois.
In Illinois, Dr. Hillard-Sembell performs below average in knee (12 vs 50 avg).
Dr. Hillard-Sembell's Medicare data shows a focused knee replacement practice with 12 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. Hillard-Sembell holds additional credentials in Sports Medicine, reflecting subspecialty training that may benefit patients with complex joint conditions.
Springfield is home to 15 orthopedic surgeons in the current Medicare dataset. Patients in the Springfield area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Dr. Hillard-Sembell's Medicare data spans 12 years, beginning in 2013. Volume peaked at 39 procedures in 2014 before settling at 12 in the most recent data. Changes in Medicare reporting, payer mix shifts, or practice focus adjustments can all influence year-to-year volume.
Dr. Hillard-Sembell's 12 knee replacement procedures is below the national average of 45 among 6,599 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. Hillard-Sembell Compares
Procedure volume compared to the Illinois state average.
Volume Trend Analysis
Dr. Hillard-Sembell's recorded volume peaked at 39 procedures in 2014 and stood at 12 in the most recent data. Year-to-year variation can reflect changes in payer mix, practice scope, or Medicare billing patterns.
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. Hillard-Sembell
How does Dr. Hillard-Sembell's procedure volume compare to other Illinois surgeons?
Dr. Hillard-Sembell has performed 12 Medicare-verified joint replacement procedures. The Illinois average is 69 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Hillard-Sembell ranks #304 out of 316 orthopedic surgeons in Illinois.
What types of joint replacement does Dr. Hillard-Sembell perform?
Dr. Hillard-Sembell's reported Medicare volume is focused on knee replacement, with 12 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Hillard-Sembell in Springfield?
Yes. There are 15 orthopedic surgeons in Springfield 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 Illinois surgeons.
What does the Medicare data for Dr. Hillard-Sembell 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. Hillard-Sembell's total practice volume — including private insurance and Medicare Advantage patients — is likely higher than the 12 procedures shown here.
Has Dr. Hillard-Sembell's procedure volume changed over time?
Dr. Hillard-Sembell's Medicare-recorded volume peaked at 39 procedures in 2014 and was 12 in the most recent data. Volume fluctuations can reflect changes in payer mix, practice focus, or Medicare reporting rather than a change in overall surgical activity.
How does Dr. Hillard-Sembell compare to other orthopedic surgeons in Springfield?
Among the 15 orthopedic surgeons in Springfield, Dr. Hillard-Sembell ranks #15 by total Medicare procedure volume. The highest-volume surgeon in Springfield has 134 verified Medicare procedures.
Other Orthopedic Surgeons in Springfield, Illinois
Dr. Hillard-Sembell's 12 Medicare procedures are below the Springfield average of 96. The table below compares verified procedure volumes for orthopedic surgeons practicing in Springfield.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Dane Church | 134 | Hip, Knee |
| Dr. D Allan | 130 | Hip, Knee |
| Dr. Piero Capecci | 123 | Hip, Knee |
| Dr. Ryan Pate | 115 | Hip, Knee |
| Dr. Daniel Rossi | 94 | Hip, Knee |
| Dr. Michaela Schneiderbauer | 62 | 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.