Zero MRSA Rates Span 47 States as 313 Hospitals Reach the Top Tier
Across 47 states, 313 hospitals recorded a methicillin-resistant Staphylococcus aureus infection rate of zero in CMS quality data. The finding comes from the federal Healthcare Associated Infections-Hospital database, which tracks how often patients acquire selected infections during medical care and gives hospitals a nationally comparable benchmark for prevention performance.
For clinicians, the number matters because MRSA is not a trivial surveillance marker. It represents a pathogen that can turn a routine admission, line placement, wound, or postoperative course into a prolonged infectious complication, often requiring broader antibiotic coverage and more intensive isolation and stewardship measures. A zero rate in this context does not mean infection control is simple; it signals that, over the reporting window, the hospital avoided a measurable MRSA hospital-onset event within the CMS framework.
The dataset covered care delivered from October 2024 through September 2025 and was last updated Aug. 13. CMS relies on measures developed by the CDC and collected through the National Healthcare Safety Network, so the figures sit within a standardized federal surveillance system rather than an internal hospital audit. The measure applies to all patients treated in acute care hospitals, including adult, pediatric, neonatal, Medicare and non-Medicare populations.
How CMS Calibrates the MRSA Measure
The CDC calculates a standardized infection ratio to compare hospitals while accounting for differences in risk and case mix. Variables may include care location, the presence of an existing infection, laboratory methods, hospital affiliation with a medical school, bed size, patient age and patient health. Those adjustments are designed to keep the measure from simply rewarding hospitals that care for healthier patients or penalizing centers that take on greater acuity.
In the current set, 57 of the 313 hospitals performed better than the national benchmark. The remaining 256 were not statistically different from it. That split is clinically important because it separates truly exceptional performance from results that are still favorable but statistically aligned with the national expectation after risk adjustment.
The benchmark also helps explain why a zero rate should be read carefully. A hospital can be excellent at MRSA prevention without necessarily falling below the benchmark in every reporting cycle, especially when infection numbers are small and patient mix varies. Surveillance data like these are most useful when interpreted as a longitudinal infection-control signal rather than a single scorecard.
What a Zero Rate Suggests at the Bedside
A hospital that avoids hospital-onset MRSA over a reporting period usually reflects multiple layers of prevention working together: hand hygiene, device stewardship, environmental cleaning, screening practices, contact precautions when appropriate, antibiotic stewardship, and rapid response when colonization or infection is suspected. No single intervention drives the result. The outcome usually reflects disciplined system design.
Because MRSA can complicate bloodstream infections, surgical wounds, pneumonia and device-associated infections, the absence of reported hospital-onset MRSA cases is more than a coding milestone. It suggests fewer opportunities for avoidable antibiotic escalation, fewer isolation burdens, and less downstream pressure on already stretched inpatient teams. In settings where resistant organisms can spread through high-acuity units, the absence of events can be a marker of strong infection prevention culture as much as of technical surveillance performance.
The federal dataset also treats this as an acute care hospital measure rather than a narrow specialty metric. Adult, pediatric, neonatal, Medicare and non-Medicare patients are all included, which makes the result relevant across a broad inpatient population rather than to one service line alone.
Why the Ranking Still Requires Caution
A zero MRSA infection rate does not mean every patient avoided colonization, and it does not guarantee identical performance across all units or time periods. It reflects the CMS-defined surveillance outcome during a fixed reporting window, with statistical adjustments intended to make comparisons fairer across hospitals that differ in size, complexity and patient mix.
Small absolute event counts can also make year-to-year comparisons unstable. Hospitals that reported zero infections in this cycle may not sustain the same result in the next if acuity rises, case volume changes or regional transmission pressure increases. For that reason, these figures are best read as one window into performance, not as a final verdict on infection prevention quality.
Even so, the list of hospitals stretches across urban, suburban and rural settings, from large academic and health-system affiliates to community hospitals. That spread suggests that strong MRSA prevention is not confined to a single hospital model. It is achievable in different settings when surveillance, stewardship and frontline infection-control practices are aligned.
The Federal Surveillance Signal Behind the Rankings
CMS data of this kind are valuable because they translate infection prevention into a standardized public metric. Hospitals and health systems can use them to identify where prevention bundles are working and where additional interventions may be needed. For patients, the measure offers a concrete marker of how seriously a hospital tracks and contains resistant organisms during inpatient care.
The current dataset also reinforces a basic epidemiologic point: MRSA remains a major hospital-quality target even when reported infection rates are low. Infections that do occur are often expensive, difficult to treat and clinically consequential. Preventing even a small number of cases can spare patients prolonged hospitalization, broader antibiotic exposure and the cascade of complications that resistant organisms can trigger.
The list now sits as a snapshot of one reporting cycle, not a permanent ranking. The next update will show whether these hospitals can maintain zero rates under changing patient volumes, shifting local transmission patterns and the constant operational pressure of acute care medicine.