Dr. Robert Gillis, M.D.
Contact & Location
717-339-2500
Gettysburg, PA 17325
Dr. Gillis performs more shoulder replacement procedures than 88% of orthopedic surgeons in Pennsylvania, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #11 of 95 ranked shoulder surgeons in Pennsylvania.
About Dr. Gillis
Practice. Dr. Robert Gillis is a board-certified orthopedic surgeon practicing in Gettysburg, Pennsylvania. The latest annual CMS data records 50 shoulder replacements and 31 knee replacements, 81 procedures in all. That is #11 in Pennsylvania for shoulder replacement. A Medicare provider since 2007.
Trend. Medicare records run from 2018 to 2024, 7 years. Volume rose from 15 procedures a year to 81, up 440%.
National context. Among 2,217 shoulder replacement surgeons tracked nationally, 50 procedures is above the national average of 29.
Local context. Gettysburg has 2 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume Trends (2013-Current)
| Year | Knee Replacement | Shoulder Replacement |
|---|---|---|
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 15 |
| 2019 | 16 | 24 |
| 2020 | 18 | 43 |
| 2021 | 19 | 32 |
| 2022 | 26 | 43 |
| 2023 | 34 | 39 |
| 2024 | 31 | 50 |
Verified Medicare Cases
How is this estimated?
Medicare Part B fee-for-service claims are one payer stream among several, and the share they represent differs by procedure. In 2024 it was 29% to 37% for shoulder replacement, 23% to 28% for knee replacement. Each verified count above is divided by its own procedure's range, and the results are added, to estimate total practice volume across all payers. The verified Medicare count is the definitive, audited figure; this is a range derived from published national volume projections, not a measurement, and an individual practice can sit well outside it: how these ranges are derived, and their sources.
How Dr. Gillis Compares
Procedure volume compared to the Pennsylvania state average.
Volume Trend Analysis
Dr. Gillis's Medicare-recorded procedure volume has trended upward over 7 years, increasing 440% from 15 procedures in 2018 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 Shoulder Replacement
If you are considering shoulder replacement surgery, these evidence-based guides can help you prepare and recover:
A practical checklist of questions covering experience, technique, hospital choice, and recovery expectations to discuss during your surgical consultation.
Nutrition and Recovery After Joint ReplacementHow protein intake, anti-inflammatory foods, hydration, and targeted supplements support bone healing and tissue repair after surgery.
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.
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. Gillis
How does Dr. Gillis's procedure volume compare to other Pennsylvania surgeons?
Dr. Gillis has performed 81 Medicare-verified joint replacement procedures. This is in line with the Pennsylvania average of 66 procedures per surgeon. Dr. Gillis ranks #96 out of 376 orthopedic surgeons in Pennsylvania.
What types of joint replacement does Dr. Gillis perform?
Dr. Gillis's Medicare data shows procedures in shoulder replacement (50 cases) and knee replacement (31 cases).
How experienced is Dr. Gillis with shoulder replacement surgery?
Dr. Gillis ranks #11 in Pennsylvania for shoulder replacement with 50 Medicare-verified procedures. This high ranking among 376 state surgeons indicates significant experience with this specific procedure.
Are there other orthopedic surgeons near Dr. Gillis in Gettysburg?
Yes. There are 2 orthopedic surgeons in Gettysburg 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 Pennsylvania surgeons.
What does the Medicare data for Dr. Gillis represent?
The procedure counts shown are based on 2024 Medicare Part B fee-for-service claims data, published by the Centers for Medicare and Medicaid Services (CMS). Medicare fee-for-service is only one payer stream, and the share of national volume it represents differs by procedure. In 2024 the share was 29% to 37% for shoulder replacement, 23% to 28% for knee replacement, which puts Dr. Gillis's total volume across all insurers at roughly 250 to 310 procedures against the 81 verified here. Those shares are derived from published national volume projections rather than quoted from a single publication, and they are estimates with real uncertainty. The OrthoProcedures methodology page shows the full derivation, the sources, and the limits at orthoprocedures.com/data-methodology.html.
Has Dr. Gillis's procedure volume changed over time?
Yes. Dr. Gillis's Medicare-recorded volume has increased from 15 procedures in 2018 to 81 in the most recent data, a 440% increase over 7 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 81 procedures in 2024.
Does Dr. Gillis perform more than one type of joint replacement?
Yes. Dr. Gillis's Medicare data shows procedures in shoulder replacement (50 cases), knee replacement (31 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Gillis affiliated with?
According to CMS facility affiliation data, Dr. Gillis is affiliated with Gettysburg Hospital, Wellspan York Hospital, Wellspan Waynesboro Hospital, Wellspan Chambersburg Hospital.
What are the quality ratings for hospitals where Dr. Gillis practices?
Gettysburg Hospital (4 out of 5 CMS stars, insufficient case volume for complication rate comparison); Wellspan York Hospital (4 out of 5 CMS stars, insufficient case volume for complication rate comparison); Wellspan Waynesboro Hospital (4 out of 5 CMS stars). These are hospital-level quality metrics from CMS Hospital Compare and do not reflect individual surgeon outcomes.
Other Orthopedic Surgeons in Gettysburg, Pennsylvania
Dr. Gillis's 81 Medicare procedures are below the Gettysburg average of 92. The table below compares verified procedure volumes for orthopedic surgeons practicing in Gettysburg.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Kyle Messick | 102 | 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.