Understanding CMS Star Ratings: What Families Need to Know

When you start researching nursing homes for a loved one, one of the first things you'll encounter is the CMS 5-star rating system. These star ratings appear on nearly every nursing home comparison site — including CareNav — and they come directly from the federal government. But what do they actually measure? And how much weight should you give them?

This guide breaks down how the system works, what each rating category means, and how to use CMS data effectively when comparing nursing homes in New York and New Jersey.

What is the CMS Star Rating System?

The Centers for Medicare & Medicaid Services (CMS) is the federal agency that oversees nursing home quality in the United States. CMS assigns every Medicare- and Medicaid-certified nursing home a rating on a scale of 1 to 5 stars, with 5 being the highest quality.

These ratings are based on three separate categories, each measuring a different dimension of care quality. The overall star rating is a composite that combines all three.

The Three Rating Categories

Health Inspections

The health inspection rating is based on the most recent three years of on-site inspections conducted by state survey agencies. Inspectors visit each facility unannounced and evaluate compliance with federal quality standards.

Key things to know about health inspection ratings:

• Inspections cover everything from medication management to infection control to resident rights
• The rating reflects both the number and severity of deficiencies found
• A single serious deficiency can significantly lower this score
• Facilities can dispute findings through a formal appeal process

Staffing

The staffing rating measures the level of nursing staff relative to the number of residents. This includes registered nurses (RNs), licensed practical nurses (LPNs), and certified nursing assistants (CNAs).

CMS looks at two staffing metrics in particular:

• Total nursing hours per resident per day
• RN hours per resident per day

Higher staffing levels generally correlate with better outcomes — residents receive more personalized attention, faster response times, and more consistent care.

Quality Measures

The quality measures rating is based on clinical outcome data that facilities report to CMS. These include metrics like the percentage of residents with pressure ulcers, the rate of falls with major injuries, and the use of physical restraints.

Quality measures are divided into two groups:

• Long-stay measures (for residents who live at the facility)
• Short-stay measures (for residents in rehabilitation or temporary care)

How to Use CMS Ratings When Comparing Facilities

CMS star ratings are a valuable starting point, but they shouldn't be the only factor in your decision. Here's how to use them effectively:

Look at individual categories, not just the overall score. A facility with a 3-star overall rating might have a 5-star staffing rating and a 1-star health inspection rating. The individual scores tell a more nuanced story.

Compare facilities in the same area. Ratings are most useful when comparing facilities near each other. A 4-star facility in one state may face different inspection standards than a 4-star facility in another.

Pair ratings with reviews. CMS data tells you about regulatory compliance and clinical outcomes. Family reviews tell you about the day-to-day experience — the kindness of the staff, the quality of the food, the cleanliness of the facility.

Check the inspection date. If the most recent inspection was over a year ago, the data may not reflect current conditions.

What CMS Ratings Don't Tell You

While CMS ratings are authoritative and data-driven, they have limitations:

• They don't measure resident satisfaction or happiness
• They don't capture the "feel" of a facility — the warmth of the staff, the atmosphere of the common areas
• They can be gamed: some facilities hire extra staff temporarily before expected inspection periods
• They don't account for the specific needs of your loved one (for example, a facility might excel at rehabilitation but have limited memory care resources)

This is exactly why CareNav combines CMS data with Google reviews and AI-powered analysis — to give you the complete picture that no single data source can provide alone.

Next Steps

Now that you understand how CMS star ratings work, you're better equipped to compare nursing homes with confidence. Here are some ways to put this knowledge to work:

• Use CareNav to search for nursing homes in your area and see their CMS ratings side by side
• Read our guide on how to evaluate a nursing home in New York for a step-by-step evaluation checklist
• Check out 10 questions to ask when touring a nursing home to prepare for facility visits