How CMS Star Ratings Work
A plain-English walkthrough of the 1-to-5-star system every facility on this site is rated on, and why a 3-star facility isn't automatically a bad one.
Every nursing home you see on this directory carries a star rating from 1 to 5, sourced directly from the Centers for Medicare & Medicaid Services (CMS). It's the same rating system that powers Medicare's own Care Compare tool, and it's worth understanding what actually goes into that single number before you use it to rule facilities in or out.
Three ratings combine into one
The overall star rating isn't one score — it's a composite of three separate CMS-measured components, each with its own rating:
- Health inspections. Based on the findings from onsite state health inspections over roughly the last three years, including complaint investigations. This component carries the most weight in the overall score.
- Staffing. Measures how much nursing staff time residents receive per day, adjusted for how medically complex the resident population is, and compares it against national benchmarks.
- Quality measures. A set of clinical outcome indicators drawn from resident assessments and claims data — things like rates of falls, pressure ulcers, hospital readmissions, and use of antipsychotic medications.
You can see all three sub-scores broken out separately on any facility's page in this directory, and side by side in the comparison tool — which matters, because a facility can be strong in one area and weaker in another, and the overall star rating alone won't tell you that.
Why a 3-star facility isn't necessarily a bad one
CMS designs the rating to be relative: facilities are compared against each other, and the distribution is set so most fall in the middle. A 3-star rating reflects average performance relative to other facilities nationwide, not a failing grade. What matters more for your specific situation is which of the three components drove that score — a facility with strong health inspections but a lower staffing score is a different conversation than one with the reverse.
How to actually use it
Treat the star rating as a starting filter, not a final answer. Use it to narrow a long list down to a shortlist, then read the underlying inspection history and staffing detail for those specific facilities, and — if timing allows — visit in person. Ratings are refreshed periodically as CMS releases new data, so a facility's score today reflects its most recent published survey cycle, not necessarily conditions this week.