Dr. Zachary Hill, M.D.
Contact & Location
559-256-5200
Fresno, CA 93720
Dr. Hill performs more knee replacement procedures than 6% of orthopedic surgeons in California, based on 2024 Medicare claims volume.Derived from the state ranking shown on this page: #460 of 491 ranked knee surgeons in California.
About Dr. Hill
Practice. Dr. Zachary Hill is a board-certified orthopedic surgeon practicing in Sacramento, California. The latest annual CMS data records 12 knee replacements. That is #460 in California for knee replacement. A Medicare provider since 2017.
Trend. Dr. Hill 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, 12 procedures is below the national average of 45. Medicare covers part of all joint replacements, so true volume is likely higher.
Local context. Sacramento has 28 orthopedic surgeons in the current Medicare data. Comparing volume and procedure mix across them is one way to narrow a shortlist.
Verified Case Volume
Verified Medicare data is available for 1 year: 12 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. 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. Hill Compares
Procedure volume compared to the California 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.
Questions to Ask Your Surgeon Before Joint ReplacementA 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.
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. Hill
How does Dr. Hill's procedure volume compare to other California surgeons?
Dr. Hill has performed 12 Medicare-verified joint replacement procedures. The California average is 68 procedures per surgeon. Medicare data captures roughly one-third of all joint replacements, so total volume may be higher. Dr. Hill ranks #577 out of 613 orthopedic surgeons in California.
What types of joint replacement does Dr. Hill perform?
Dr. Hill'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.
Where is Dr. Hill's practice located?
Dr. Hill's current practice address is in Fresno, CA. That address is the current practice address in Dr. Hill's own CMS NPPES registry entry, which providers maintain themselves. The Medicare claims data used for the rankings on this page was billed from Sacramento, California.
What does the Medicare data for Dr. Hill 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, which puts Dr. Hill's total volume across all insurers at roughly 40 to 50 procedures against the 12 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.
Which hospitals is Dr. Hill affiliated with?
According to CMS facility affiliation data, Dr. Hill is affiliated with Saint Agnes Medical Center, Fresno Surgical Hospital, Kaweah Health Medical Center.
How does Dr. Hill compare to other orthopedic surgeons in Sacramento?
Among the 28 orthopedic surgeons in Sacramento, Dr. Hill ranks #26 by total Medicare procedure volume. The highest-volume surgeon in Sacramento has 147 verified Medicare procedures.
What are the quality ratings for hospitals where Dr. Hill practices?
Saint Agnes Medical Center (2 out of 5 CMS stars, hip/knee complication rate similar to national average); Fresno Surgical Hospital (hip/knee complication rate similar to national average); Kaweah Health Medical Center (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 Sacramento, California
Dr. Hill's 12 Medicare procedures are below the Sacramento average of 81. The table below compares verified procedure volumes for orthopedic surgeons practicing in Sacramento.
| Surgeon | Procedures | Specialties |
|---|---|---|
| Dr. Stephen Howell | 147 | Knee |
| Dr. John Meehan | 104 | Hip, Knee |
| Dr. Mauro Giordani | 85 | Hip, Knee |
| Dr. David Tai | 80 | Hip, Knee |
| Dr. Adam Taylor | 77 | Hip, Knee |
| Dr. Samuel Hu | 64 | 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.