Sutter Health CMS Star Ratings 2025 Raise Eyebrows
Sutter Health posted a mixed but generally strong set of CMS hospital star ratings in 2025: four of its hospitals earned the top five-star mark, while eight more received four stars, according to Sutter's own August 5, 2025 update. The five-star hospitals included Alta Bates Summit Medical Center - Summit Campus, Sutter Lakeside Hospital, Mills-Peninsula Medical Center, and Novato Community Hospital.
What the 2025 ratings showed
The headline for the 2025 CMS update is that Sutter remained well above the national baseline in multiple locations, even though not every campus reached the top tier. Sutter said only about 10% of hospitals nationwide received five stars, which puts its four five-star hospitals in an elite subset by CMS standards.
CMS hospital star ratings are designed to bundle several quality measures into a single public score, including mortality, readmissions, patient experience, safety, and timeliness or effectiveness of care. That makes the ratings useful for broad comparison, but they are not a complete picture of a hospital's performance or specialty strengths.
2025 Sutter snapshot
| Category | 2025 result | Notes |
|---|---|---|
| Five-star hospitals | 4 | Alta Bates Summit Summit Campus, Sutter Lakeside, Mills-Peninsula, Novato Community Hospital. |
| Four-star hospitals | 8 | Included Sutter Medical Center, Sacramento; Sutter Davis; Sutter Santa Rosa Regional Hospital; and others. |
| Top-tier share | About 10% nationally | Sutter highlighted the rarity of five-star ratings across U.S. hospitals. |
| Quality measures cited | Cleanliness, infections, patient feedback | Sutter noted strong performance in several individual quality measures. |
Why people are talking
The eyebrow-raising part of the CMS star ratings story is not that Sutter had strong performers, but that the distribution is uneven across the system. A health system can look excellent in aggregate while still showing meaningful variation from campus to campus, and that is exactly why these rankings attract attention from patients, employers, and local media.
Sutter also framed the ratings as evidence of continued progress, noting that several hospitals earned five-star recognition for individual measures that feed into the overall score. Those included cleanliness and low rates of hospital-acquired infections such as Clostridioides difficile, central line-associated bloodstream infections, and catheter-associated urinary tract infections.
Historical context
In July 2023, Sutter reported that 10 hospital campuses had earned five stars and five had earned four stars, with 71% of campuses rated four or five stars overall. That earlier performance suggests the 2025 result was still strong, but with a different balance across campuses and fewer total five-star sites than the 2023 update described by the health system.
That kind of year-to-year movement is common in CMS scoring because the methodology incorporates several data sources and can shift when hospitals improve, regress, or get measured against a changing field. For readers, the practical takeaway is simple: a hospital's star rating is best used as a starting point, not as the only factor in choosing care.
"These ratings reflect Sutter's ongoing commitment to delivering high-quality, safe care for all," the health system said in its 2025 announcement.
Hospitals named
The four five-star campuses Sutter publicly named in 2025 were Alta Bates Summit Summit Campus, Sutter Lakeside Hospital, Mills-Peninsula Medical Center, and Novato Community Hospital. Sutter said Mills-Peninsula had held five stars for seven consecutive years, while Novato Community Hospital had done so for five consecutive years.
- Alta Bates Summit Medical Center - Summit Campus.
- Sutter Lakeside Hospital.
- Sutter's Mills-Peninsula Medical Center.
- Sutter's Novato Community Hospital.
- Sutter Medical Center, Sacramento, among the four-star group.
- Sutter Santa Rosa Regional Hospital, among the four-star group.
How the scores work
CMS hospital star ratings combine performance across major quality domains into a single score that ranges from one to five stars. The goal is to give consumers a simpler view of hospital quality, but the tradeoff is that specialty excellence in one service line may not fully show up in the final number.
For that reason, patient advocates often recommend checking the star rating alongside service-specific metrics, physician quality, and local access considerations. A hospital with four stars may still outperform a five-star hospital in a specific specialty, procedure, or geography that matters to a given patient.
What readers should know
For patients in Northern California, the 2025 update suggests Sutter remains a competitive system with several standout hospitals, especially in the Bay Area and North Bay. It also suggests there is room for improvement at campuses that landed at four stars, even though that is still a solid result by national standards.
- Use the star rating as a first filter, not the final decision.
- Check whether the campus you would actually use is the one with the best score.
- Look at infection rates, readmissions, and patient experience measures next.
- Consider specialty-specific needs, such as maternity, cardiac care, or emergency access.
Why this matters now
The 2025 ratings arrive at a time when hospital transparency is under growing scrutiny and consumers are more likely to compare care settings before making appointments or planning procedures. For a system as large as Sutter, the headline number matters, but the campus-by-campus spread matters even more because it reveals where quality is being sustained and where execution is less consistent.
That is why the phrase raise eyebrows fits the story: not because Sutter's results were weak, but because the variation between campuses makes the system's quality profile more complicated than a simple win-or-loss narrative. Strong overall performance can coexist with uneven local experiences, and that is exactly what the 2025 CMS update illustrates.
Helpful tips and tricks for Sutter Health Cms Star Ratings 2025 Raise Eyebrows
What are CMS star ratings?
CMS star ratings are public hospital quality scores from the Centers for Medicare & Medicaid Services that summarize several performance measures into a one-to-five-star scale. They are meant to help patients compare hospitals quickly, but they should be reviewed alongside more detailed quality and specialty data.
How many Sutter hospitals got five stars in 2025?
Four Sutter hospitals earned five stars in the 2025 CMS update, according to Sutter's August 5, 2025 announcement. Eight additional hospitals received four stars.
Did Sutter improve or decline from earlier years?
Compared with Sutter's 2023 statement that 10 campuses had earned five stars, the 2025 update shows fewer five-star campuses but still a strong systemwide result. Because CMS ratings can shift as measures and performance change, year-over-year movement is normal.
Should patients trust star ratings alone?
No. Star ratings are useful, but they do not capture every factor that matters, especially for specialty care, local access, or individual physician performance. They work best as one part of a broader comparison process.