Dr. James Carpenter, MD
Contact & Location
734-936-5780
Ann Arbor, MI 48105
Dr. Carpenter performs more shoulder replacement procedures than 43% of orthopedic surgeons in Michigan, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #33 of 58 ranked shoulder surgeons in Michigan.
About Dr. Carpenter
Dr. James Carpenter is a board-certified orthopedic surgeon practicing in Ann Arbor, Michigan. A Medicare provider since 2006, Dr. Carpenter performed 19 Medicare-verified shoulder replacements in the latest annual CMS data, ranking #33 in Michigan.
In Michigan, Dr. Carpenter performs below the state average in shoulder (19 vs 28).
Dr. Carpenter's Medicare data shows a focused shoulder replacement practice with 19 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.
Ann Arbor is home to 9 orthopedic surgeons in the current Medicare dataset. Patients in the Ann Arbor area can compare surgeon volume and procedure specialization to find the right fit for their joint replacement needs.
Medicare records for Dr. Carpenter extend back to 2016, covering 7 years of data. Over that period, recorded procedure volume increased from 11 to 19 in the most recent data, a 73% increase. This sustained growth reflects an expanding joint replacement practice.
Dr. Carpenter's 19 shoulder replacement procedures is below the national average of 29 among 2,217 surgeons. Medicare data captures roughly a third of all joint replacements, so actual volume is likely higher.
Verified Case Volume Trends (2013-Current)
| Year | Shoulder Replacement |
|---|---|
| 2013 | 0 |
| 2014 | 0 |
| 2015 | 0 |
| 2016 | 11 |
| 2017 | 0 |
| 2018 | 0 |
| 2019 | 11 |
| 2020 | 13 |
| 2021 | 15 |
| 2022 | 21 |
| 2023 | 24 |
| 2024 | 19 |
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. Carpenter Compares
Procedure volume compared to the Michigan state average.
Volume Trend Analysis
Dr. Carpenter's Medicare-recorded procedure volume has trended upward over 7 years, increasing 73% from 11 procedures in 2016 to 19 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:
Evidence-based exercises and lifestyle adjustments that can improve surgical outcomes and speed recovery when started weeks before your procedure.
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.
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.
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. Carpenter
How does Dr. Carpenter's procedure volume compare to other Michigan surgeons?
Dr. Carpenter has performed 19 Medicare-verified joint replacement procedures. The Michigan average is 49 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Carpenter ranks #197 out of 256 orthopedic surgeons in Michigan.
What types of joint replacement does Dr. Carpenter perform?
Dr. Carpenter's reported Medicare volume is focused on shoulder replacement, with 19 verified procedures. Some surgeons choose to concentrate on a single joint type to build deep procedural expertise.
Are there other orthopedic surgeons near Dr. Carpenter in Ann Arbor?
Yes. There are 9 orthopedic surgeons in Ann Arbor 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 Michigan surgeons.
What does the Medicare data for Dr. Carpenter 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. Carpenter's total volume across all insurers at roughly 50 to 70 procedures against the 19 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. Carpenter's procedure volume changed over time?
Yes. Dr. Carpenter's Medicare-recorded volume has increased from 11 procedures in 2016 to 19 in the most recent data, a 73% increase over 7 years. This upward trend suggests an expanding joint replacement practice. Peak volume was 24 procedures in 2023.
Which hospitals is Dr. Carpenter affiliated with?
According to CMS facility affiliation data, Dr. Carpenter is affiliated with University Of Michigan Health.
How does Dr. Carpenter compare to other orthopedic surgeons in Ann Arbor?
Among the 9 orthopedic surgeons in Ann Arbor, Dr. Carpenter ranks #5 by total Medicare procedure volume. The highest-volume surgeon in Ann Arbor has 98 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Carpenter practices?
University Of Michigan Health (4 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 Ann Arbor, Michigan
Dr. Carpenter's 19 Medicare procedures are below the Ann Arbor average of 46. The table below compares verified procedure volumes for orthopedic surgeons practicing in Ann Arbor.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Andrew Urquhart | 98 | Hip, Knee |
| Dr. Derek Semaan | 81 | Hip, Knee |
| Dr. Asheesh Bedi | 47 | Shoulder |
| Dr. Peter Schilling | 43 | Hip, Knee |
| Dr. Christopher Bush | 16 | Shoulder |
| Dr. Bruce Miller | 16 | 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.