Dr. Peter Chalmers, M.D.
Contact & Location
314-514-3500
Saint Louis, MO 63110
Dr. Chalmers performs more shoulder replacement procedures than 60% of orthopedic surgeons in Missouri, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #22 of 56 ranked shoulder surgeons in Missouri.
About Dr. Chalmers
Practice. Dr. Peter Chalmers is a board-certified orthopedic surgeon practicing in Saint Louis, Missouri. The latest annual CMS data records 25 shoulder replacements. That is #22 in Missouri for shoulder replacement. A Medicare provider since 2010.
Trend. Medicare records run from 2017 to 2024, 8 years. Volume rose from 17 procedures a year to 25, up 47%.
National context. Among 2,217 shoulder replacement surgeons tracked nationally, 25 procedures is near the national average of 29.
Local context. Saint Louis has 57 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 | Shoulder Replacement |
|---|---|
| 2013 | 0 |
| 2014 | 0 |
| 2015 | 0 |
| 2016 | 0 |
| 2017 | 17 |
| 2018 | 12 |
| 2019 | 20 |
| 2020 | 21 |
| 2021 | 30 |
| 2022 | 31 |
| 2023 | 27 |
| 2024 | 25 |
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. 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. Chalmers Compares
Procedure volume compared to the Missouri state average.
Volume Trend Analysis
Dr. Chalmers's Medicare-recorded procedure volume has trended upward over 8 years, increasing 47% from 17 procedures in 2017 to 25 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 step-by-step walkthrough of your surgical day, from pre-op preparation through anesthesia, the procedure itself, and the first hours of recovery.
Recovery Timeline: Week-by-Week ExpectationsA detailed week-by-week guide covering pain levels, mobility milestones, physical therapy progression, and when to expect a return to daily activities.
Medicare Coverage for Joint ReplacementWhat Medicare Part A and Part B cover for joint replacement surgery, including hospital stays, surgeon fees, anesthesia, and physical therapy.
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. Chalmers
How does Dr. Chalmers's procedure volume compare to other Missouri surgeons?
Dr. Chalmers has performed 25 Medicare-verified joint replacement procedures. The Missouri average is 59 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Chalmers ranks #143 out of 204 orthopedic surgeons in Missouri.
What types of joint replacement does Dr. Chalmers perform?
Dr. Chalmers's reported Medicare volume is focused on shoulder replacement, with 25 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Chalmers in Saint Louis?
Yes. There are 57 orthopedic surgeons in Saint Louis 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 Missouri surgeons.
What does the Medicare data for Dr. Chalmers 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, which puts Dr. Chalmers's total volume across all insurers at roughly 70 to 90 procedures against the 25 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. Chalmers's procedure volume changed over time?
Yes. Dr. Chalmers's Medicare-recorded volume has increased from 17 procedures in 2017 to 25 in the most recent data, a 47% increase over 8 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 31 procedures in 2022.
Which hospitals is Dr. Chalmers affiliated with?
According to CMS facility affiliation data, Dr. Chalmers is affiliated with University Of Utah Hospital And Clinics. Dr. Chalmers maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
How does Dr. Chalmers compare to other orthopedic surgeons in Saint Louis?
Among the 57 orthopedic surgeons in Saint Louis, Dr. Chalmers ranks #43 by total Medicare procedure volume. The highest-volume surgeon in Saint Louis has 279 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Chalmers practices?
University Of Utah Hospital And Clinics (5 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 Saint Louis, Missouri
Dr. Chalmers's 25 Medicare procedures are below the Saint Louis average of 145. The table below compares verified procedure volumes for orthopedic surgeons practicing in Saint Louis.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Ryan Nunley | 279 | Hip, Knee |
| Dr. Christopher Palmer | 160 | Hip, Knee |
| Dr. Michael Hubbard | 144 | Hip, Knee, Shoulder |
| Dr. Coles L'hommedieu | 139 | Hip, Knee |
| Dr. Ilya Bendich | 137 | Hip, Knee |
| Dr. Christopher Mudd | 132 | 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.