CMS Hospital Star Ratings: Only 12% of U.S. Hospitals Earn Top 5-Star Score

Understanding the Star Rating System

Choosing a hospital can feel overwhelming. To help patients make informed decisions, the Centers for Medicare & Medicaid Services (CMS) gives hospitals star ratings, much like a movie or restaurant review. These ratings offer a quick snapshot of how well a hospital performs across several important quality areas. The latest update shows that achieving the highest score is not common. In fact, only a small fraction of hospitals earned the top five-star rating.

CMS released its updated Overall Hospital Quality Star Ratings this week. The goal of the program is to provide a clear, publicly available tool that anyone can use. The ratings are based on dozens of measures that reflect what matters most to patients: survival rates, safety, and the overall care experience. By distilling complex data into a simple star system, CMS hopes to encourage hospitals to improve and to help people compare facilities in their area.

A Look at the Latest Numbers

The newest data paints a picture of the nation’s hospitals. Most facilities landed in the middle, with a smaller number at either end of the spectrum. Here is the exact breakdown of the star ratings across all reporting hospitals:

• 5 stars: 385 hospitals (12% of the total)
• 4 stars: 953 hospitals (29.8%)
• 3 stars: 991 hospitals (30.9%)
• 2 stars: 670 hospitals (20.9%)
• 1 star: 204 hospitals (6.4%)

Adding up the middle categories shows that the three- and four-star groups together represent more than 60% of all hospitals rated. This means that while a handful of facilities clearly stand out, the average patient is most likely to encounter a hospital with a middling score. The low number of five-star hospitals also highlights how tough it is to earn top marks.

How the Ratings Are Calculated

The star ratings are not based on a single opinion or a simple survey. They summarize data from five major areas of quality, each with a specific weight. Understanding these areas helps explain what a star rating really means for patient care.

The five quality areas and their standard weights are:

• Mortality (22%): Measures death rates for patients with certain conditions or procedures.
• Safety of care (22%): Looks at things like infections, bed sores, and other complications that happen in the hospital.
• Readmission (22%): Tracks how often patients need to return to the hospital shortly after being discharged.
• Patient experience (22%): Reflects what patients say about their stay, including communication with doctors and nurses and the hospital environment.
• Timely and effective care (12%): Measures how quickly and appropriately hospitals provide recommended treatments, such as giving certain medications fast or performing tests in a timely way.

There is an important detail about how the math works. If a hospital does not have enough data in one of these categories, that category’s weight gets spread across the others. For example, if a hospital had no measures for patient experience, its 22% weight would be redistributed. The new weights would then be 28.2% each for mortality, safety of care, and readmission, and 15.4% for timely and effective care. This approach ensures the final star rating still reflects the information that is available without penalizing hospitals for missing data points.

The Data Behind the Stars

Hospitals do not create their own ratings. They report quality data through several mandatory programs run by CMS. These programs collect information that covers both inpatient and outpatient care. The specific reporting programs include:

• Hospital Inpatient Quality Reporting Program
• Hospital Outpatient Quality Reporting Program
• Hospital Readmission Reduction Program
• Hospital-Acquired Condition Reduction Program
• Hospital Value-Based Purchasing Program

Information from these programs flows into the star rating calculations. This means the scores are built on real patient outcomes, not voluntary surveys. Because participation in these reporting programs is tied to Medicare payments, nearly all acute-care hospitals in the United States are included. Starting in July 2023, Veterans Health Administration hospitals that report the required data also became eligible for star ratings. However, Department of Defense hospitals are not included in the star rating calculations at this time.

A Brief History of the Star Ratings

CMS first launched the Overall Hospital Quality Star Rating program in 2016. The idea was to create a single, easy-to-understand public database of hospital quality. Before this, patients and families had to sift through many different websites and confusing metrics. The star rating aimed to bring that information together into one place.

Over the years, the ratings have faced criticism. Some hospital leaders and researchers have pointed to limitations in the methodology. They argued that the way data was combined sometimes made it difficult to tell small differences in quality apart. Others said the ratings could unfairly penalize hospitals that treat sicker or more complex patients.

A recent cohort study found that higher star ratings were generally associated with better surgical outcomes. However, the same study noted that there was wide variability in outcomes within each star rating group. This suggests that while the ratings can offer a rough guide, they may have limited usefulness when a patient is trying to pick the best hospital for a specific surgery.

In 2020, CMS paused the star ratings to evaluate and refine the methodology. A revised version was released in 2021. More updates have followed. The current methodology was adjusted as part of the 2026 Medicare Hospital Outpatient Prospective Payment System and the Medicare Ambulatory Surgical Center payment system final rule. These ongoing tweaks show that CMS is trying to make the ratings more accurate and fair over time.

What This Means for Patients and Families

If you are facing a hospital stay or planning a procedure, the star rating can be a helpful starting point. A five-star hospital has performed well across multiple quality areas, including survival rates, avoiding complications, and giving patients a positive experience. However, a low star rating does not necessarily mean a hospital is unsafe. It may point to specific areas where a facility needs to improve, such as readmission rates or communication with patients.

For many people, the nearest hospital may have a three-star rating. That does not automatically mean you should travel far away for care. It does mean you might want to ask more questions. You can look deeper into the specific measures that matter most for your situation. For example, if you are having a knee replacement, you might focus on safety scores and patient experience. If you are managing a chronic condition, readmission rates could be especially important.

It is also worth remembering that not every hospital is included in the ratings because some do not report all the required data. Small rural hospitals or specialty surgical centers may be missing from the star system altogether, even though they provide excellent care.

Limitations and Expert Cautions

Health policy experts generally support public reporting as a way to drive quality improvement. But they also urge caution when interpreting any single rating. Because the CMS star ratings combine many different measures, a very high score in one area can mask a poor score in another. You might not easily see that a five-star hospital has a lower-than-average patient experience rating if its mortality and safety numbers are outstanding.

The study that noted wide variability within star levels reinforces a key point: two hospitals with identical star ratings may have quite different surgical results. This is especially true for complex care. A star rating alone does not tell the whole story. Experts suggest using the ratings alongside other resources, including conversations with your doctor, state health department reports, and patient satisfaction websites.

Another common concern is that the ratings rely partly on billing data and claims, which may not capture the full picture of a patient’s health. A hospital that treats many low-income or very sick patients might have worse outcomes because of factors outside its control. CMS has tried to account for this through statistical adjustments, but some critics argue the adjustments are not perfect.

Practical Tips for Using Hospital Ratings

Here are some practical steps you can take when using the CMS star ratings and other tools to choose a hospital:

• Check the full list. CMS publishes the complete list of hospital star ratings on its website. Look up the hospitals in your area to see how they compare.
• Look beyond the stars. Click through to see the detailed breakdown. You may find that a three-star hospital has excellent safety scores but struggles with timely care.
• Consider your specific needs
  Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making any health decisions. Content reviewed by the HealthyMag Editorial Team.

  Source: MedPage Today