Dr. Zachary Clarke, M.D.
Contact & Location
210-567-9040
San Antonio, TX 78249
San Antonio, TX 78229
Dr. Clarke performs more knee replacement procedures than 55% of orthopedic surgeons in Texas, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #220 of 489 ranked knee surgeons in Texas.
About Dr. Clarke
Practice. Dr. Zachary Clarke is a board-certified orthopedic surgeon practicing in San Antonio, Texas. The latest annual CMS data records 33 knee replacements and 16 hip replacements, 49 procedures in all. That is #220 in Texas for knee replacement. A Medicare provider since 2019.
Trend. Dr. Clarke first appears in the Medicare data in 2024. With 1 year on record, the trend is still short.
National context. Among 6,612 knee replacement surgeons tracked nationally, 33 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. San Antonio has 41 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist. Dr. Clarke also holds hospital privileges in TX and VA, a practice that extends beyond Texas.
Verified Case Volume
Verified Medicare data is available for 1 year: 49 procedures in the most recent reporting year. A multi-year trend chart is shown once at least 3 years of data are available.
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 23% to 28% for knee replacement, 25% to 33% for hip 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. Clarke Compares
Procedure volume compared to the Texas state average.
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.
What to Expect on the Day of SurgeryA step-by-step walkthrough of your surgical day, from pre-op preparation through anesthesia, the procedure itself, and the first hours of recovery.
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 Coverage for Joint ReplacementWhat Medicare Part A and Part B cover for joint replacement surgery, including hospital stays, surgeon fees, anesthesia, and physical therapy.
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. Clarke
How does Dr. Clarke's procedure volume compare to other Texas surgeons?
Dr. Clarke has performed 49 Medicare-verified joint replacement procedures. This is in line with the Texas average of 57 procedures per surgeon. Dr. Clarke ranks #242 out of 582 orthopedic surgeons in Texas.
What types of joint replacement does Dr. Clarke perform?
Dr. Clarke's Medicare data shows procedures in knee replacement (33 cases) and hip replacement (16 cases).
Are there other orthopedic surgeons near Dr. Clarke in San Antonio?
Yes. There are 41 orthopedic surgeons in San Antonio 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 Texas surgeons.
What does the Medicare data for Dr. Clarke 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 23% to 28% for knee replacement, 25% to 33% for hip replacement, which puts Dr. Clarke's total volume across all insurers at roughly 170 to 210 procedures against the 49 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.
Does Dr. Clarke perform more than one type of joint replacement?
Yes. Dr. Clarke's Medicare data shows procedures in knee replacement (33 cases), hip replacement (16 cases). Surgeons who perform multiple joint replacement types maintain broad technical skills across different anatomical joints.
Which hospitals is Dr. Clarke affiliated with?
According to CMS facility affiliation data, Dr. Clarke is affiliated with Ut Health San Antonio Multispecialty & Research Ho, University Health System, Methodist Hospital, Baptist Medical Center, Inova Mount Vernon Hospital. Dr. Clarke maintains hospital privileges across state lines, indicating a practice that serves patients in multiple states.
How does Dr. Clarke compare to other orthopedic surgeons in San Antonio?
Among the 41 orthopedic surgeons in San Antonio, Dr. Clarke ranks #20 by total Medicare procedure volume. The highest-volume surgeon in San Antonio has 383 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Clarke practices?
University Health System (3 out of 5 CMS stars, insufficient case volume for complication rate comparison); Methodist Hospital (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 San Antonio, Texas
Dr. Clarke's 49 Medicare procedures are below the San Antonio average of 186. The table below compares verified procedure volumes for orthopedic surgeons practicing in San Antonio.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Christopher Phelps | 383 | Hip, Knee, Shoulder |
| Dr. Bryan Kaiser | 235 | Hip, Knee |
| Dr. Richard Ursone | 191 | Hip, Knee, Shoulder |
| Dr. Casey Taber | 172 | Hip, Knee |
| Dr. Robert Girling | 155 | Hip, Knee |
| Dr. Matthew Morrey | 116 | 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.