When families start searching for a nursing home for a loved one, they're often overwhelmed. There are hundreds of facilities in most metro areas, and it's nearly impossible to evaluate them without data. The CMS Five-Star Quality Rating System is the single best public tool available — and it's completely free.
What Is the Five-Star Rating System?
The Centers for Medicare & Medicaid Services (CMS) rates every one of the approximately 15,800 Medicare-certified nursing homes in the United States on a scale of 1 to 5 stars. One star means "much below average." Five stars means "much above average."
The system was introduced in December 2008 and has been refined significantly since then, particularly around staffing data (which now uses payroll records rather than facility self-reporting).
The Four Components
The overall rating is built from three separate ratings, each measuring a different aspect of care quality:
1. Health Inspections (Survey Rating)
This component reflects the results of onsite inspections conducted by state survey agencies on behalf of CMS. Inspectors visit nursing homes unannounced and assess compliance with federal regulations.
The health inspection rating covers:
- Standard surveys (comprehensive inspections, typically annual)
- Complaint investigations (triggered by resident or family complaints)
- Focused infection control surveys (added during and after COVID-19)
Inspection results from the last three years are included, with more recent years weighted more heavily.
Red flags in this component:
- Any "J," "K," or "L" severity deficiency — these indicate "immediate jeopardy" to resident health or safety
- "G," "H," or "I" deficiencies indicate actual harm occurred
- The presence of an abuse citation (tag F600–F610) is particularly serious
2. Staffing Rating
Staffing is one of the strongest predictors of nursing home quality. Facilities with higher nurse-to-resident ratios consistently show better outcomes across every quality measure.
The staffing rating is based on two metrics:
- Total nurse staffing hours per resident per day (includes RNs, LPNs, and CNAs)
- Registered nurse (RN) hours per resident per day
Since 2016, CMS has required facilities to submit staffing data through the Payroll-Based Journal (PBJ) system, which uses actual payroll records. This ended years of facilities misreporting their staffing levels.
What to look for:
- 4.1+ total nursing hours per resident per day is considered adequate
- 0.5+ RN hours per resident per day is the minimum you want to see
- RN turnover rate above 40% is a warning sign
3. Quality Measures Rating
The quality measures rating reflects 30+ clinical metrics calculated from resident assessment data. These are divided into short-stay measures (for residents in for rehabilitation) and long-stay measures (for permanent residents).
Short-stay measures include:
- Rate of re-hospitalization after nursing home admission
- Percentage of residents who improved in their ability to move
- Percentage who returned to home or community
Long-stay measures include:
- Percentage of residents with pressure sores
- Percentage using antipsychotic medications (a proxy for chemical restraint)
- Percentage who received flu and pneumococcal vaccines
- Rate of falls with major injury
4. Overall Rating
The overall rating is a weighted composite that CMS calculates from the three components above. It's useful as a quick filter, but you should always look at the individual components — a 4-star overall rating could hide a 1-star staffing score.
How to Use This Information
Here's a practical approach:
Start with any facility that has an abuse citation and rule it out. NursingHomeUSA flags these prominently with a red banner. An abuse citation means inspectors found evidence of resident abuse during a recent inspection.
Check for Special Focus Facility (SFF) status. CMS maintains a list of the worst-performing nursing homes. Being on this list means repeated serious deficiencies.
Look at the staffing rating and the actual numbers. A 3-star staffing rating at one facility might mean 3.2 hours per resident per day; at another it might mean 2.8. See the raw numbers.
Check RN turnover. High turnover means the registered nurses who actually make clinical decisions are constantly leaving. That's disruptive to resident care and often signals poor management.
Read the inspection deficiencies. Look at the severity codes (the letters). Anything G or above means a real resident was actually harmed.
What the Rating System Doesn't Capture
The Five-Star system is valuable but imperfect:
- Resident satisfaction is not included in ratings
- Staff-to-resident ratios vary by shift — an acceptable daily average can hide severely understaffed nights and weekends
- Small facilities can have statistically unreliable quality measure scores
- Recent changes in ownership or management may not yet be reflected in ratings
Despite these limitations, the Five-Star system is the best standardized tool available to families. Use it as a starting filter, then visit the facilities you're seriously considering and ask staff directly about turnover and staffing ratios by shift.
The Bottom Line
A 4 or 5-star overall rating is a good starting point. But never stop there. Check for abuse citations, look at the staffing component specifically, and review the inspection deficiencies — especially any G+ severity codes. That combination gives you a much more complete picture than the star number alone.