Data / Hospitals / California / Alta Bates Summit Medical Center
Alta Bates Summit Medical Center, Oakland, CA: 5 of 5 stars, owned by Sutter Health
Alta Bates Summit Medical Center in Oakland, CA is owned by Sutter Health, is rated 5 of 5 stars by Medicare and has emergency services. In fiscal year 2026 it had no payment reduction under the Hospital-Acquired Condition Reduction Program. Its excess readmission ratio is above 1.0 for 1 of the 6 conditions the Hospital Readmissions Reduction Program measures.
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- Address
- 350 Hawthorne Avenue, Oakland, CA 94609
- Hospital type
- Acute Care Hospitals
- Ownership type
- Voluntary non-profit, Private
- Overall rating
- 5 of 5 stars
- Emergency services
- Yes
- Mortality measures
- 2 better, 6 no different and 0 worse than the national rate
- Safety measures
- 4 better, 3 no different and 0 worse than the national rate
- Readmission measures
- 3 better, 6 no different and 0 worse than the national rate
- HAC payment reduction, fiscal year 2026
- No
- Total HAC score
- -0.809
- Conditions with excess readmissions
- 1 of 6
- CMS Certification Number
- 050043
- On Care Compare
- Medicare Care Compare
Hospital-Acquired Condition Reduction Program, fiscal year 2026
Each measure as CMS scored it. Infection measures are standardized infection ratios, where 1.0 is the national benchmark and lower is better. The program reduces Medicare payments by 1% for hospitals in the worst performing quarter of hospitals.
| Measure | Value | Winsorized z score | Source |
|---|---|---|---|
| Patient safety indicators composite (PSI 90) | 0.8896 | -0.690 | data.cms.gov |
| Central line bloodstream infections (CLABSI) | 0.212 | -0.915 | data.cms.gov |
| Catheter-associated urinary tract infections (CAUTI) | 0.183 | -0.877 | data.cms.gov |
| Surgical site infections (SSI) | 0.23 | -1.062 | data.cms.gov |
| Clostridioides difficile infections (CDI) | 0.257 | -0.467 | data.cms.gov |
| MRSA bloodstream infections | 0.295 | -0.841 | data.cms.gov |
Hospital Readmissions Reduction Program
An excess readmission ratio above 1.0 means more patients came back within 30 days than expected for this hospital's patients. Highest ratio first.
| Condition | Discharges | Excess readmission ratio | Predicted rate | Expected rate | Period | Source |
|---|---|---|---|---|---|---|
| Chronic obstructive pulmonary disease | 109 | 1.0050 | 18.92% | 18.83% | 2021-07-01 to 2024-06-30 | data.cms.gov |
| Hip and knee replacement | Not listed | 0.9643 | 4.61% | 4.78% | 2021-07-01 to 2024-06-30 | data.cms.gov |
| Heart failure | 544 | 0.9524 | 19.03% | 19.98% | 2021-07-01 to 2024-06-30 | data.cms.gov |
| Heart attack | 345 | 0.8994 | 12.88% | 14.32% | 2021-07-01 to 2024-06-30 | data.cms.gov |
| Pneumonia | 297 | 0.8888 | 14.76% | 16.61% | 2021-07-01 to 2024-06-30 | data.cms.gov |
| Coronary artery bypass graft surgery | Not listed | 0.8736 | 10.84% | 12.41% | 2021-07-01 to 2024-06-30 | data.cms.gov |
Owners and managers
Organizations CMS lists as owners or managers of this hospital, as CMS names them, from the September 29, 2026 ownership file. CMS also lists 18 individual or personal trusts (18 officers, directors or managing employees). Their names are not shown on this page.
| Organization | Role | Share | Since | Source |
|---|---|---|---|---|
| Sutter Health | Direct owner | 100% | December 27, 1999 | data.cms.gov |
Also on SpecStream
- All hospitals in California
- Every hospital Sutter Health owns or manages
- This hospital on Medicare Care Compare
Updated November 7, 2026. Read from CMS Provider Data Catalog and data.cms.gov, hospitals. Open data from the Centers for Medicare & Medicaid Services (US government work). Ratings and program results are as CMS lists them on the date shown and CMS refreshes them on its own schedule. The CMS files are joined on the CMS Certification Number. CMS gives each owner organization an ID, and an owner page groups hospitals on that ID. Names of individual owners and managers are not shown. This page uses CMS data and is not endorsed or certified by CMS. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.