Complications & Deaths Measures
20
CMS-tracked
California · Acute Care
John Muir Medical Center - Walnut Creek Campus
According to PlainHospital's CMS star-rating ranking (CMS Hospital Compare overall stars), John Muir Medical Center - Walnut Creek Campus ranks #2608 of 3182 rated US hospitals by overall star rating (highest = #1).
- 2★
- CMS overall rating
- #2608 of 3182
- Corpus placement
- 20
- Quality measures
- 6
- Infection types
Data currency: Hospital quality, safety, and patient-experience measures from the CMS Care Compare program (published quarterly), last refreshed May 2026. See our methodology for source dates. Spot a figure that looks wrong? Report a correction.
1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa County · (925) 939-3000
The verdict
According to PlainHospital's CMS star-rating ranking (CMS Hospital Compare overall stars), John Muir Medical Center - Walnut Creek Campus ranks #2608 of 3182 rated US hospitals by overall star rating (highest = #1). Overall CMS stars: 2/5 (below the 3.2-star national average).
- 2 / 5
- CMS overall star rating
- #2608 of 3182
- rated-hospital corpus placement
- 8
- measures better than national of 25 compared
- Yes
- emergency department on site
Since the last CMS release
CMS lowered this hospital from 3 to 2 stars between its May 2026 and August 2026 releases, a fall of 1.
CMS replaces its file at each release rather than publishing a changelog, so this comparison exists only because the earlier release is kept on file. See what changed nationally.
Where John Muir Medical Center - Walnut Creek Campus sits among rated US hospitals
2 Top 94% higher than 6% of 3,182 rated hospitals
Each bar is a band; taller bars hold more rated hospitals. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Hospital Compare, overall hospital rating · 2026-08-14
John Muir Medical Center - Walnut Creek Campus vs. California and the nation
- John Muir Medical Ce…
John Muir Medical Center - Walnut Creek Campus
2 stars
- California avg
California state average
3.1 stars
- US avg
National average
3.2 stars
What this shows At 2 stars, John Muir Medical Center - Walnut Creek Campus rates below the California average of 3.1 and below the national average of 3.2.
Type
Acute Care Hospitals
Ownership
Voluntary non-profit - Other
Emergency Services
Yes
Birthing Friendly
Yes
Patient Experience
17
HCAHPS domains
Infection Types
6
CDC NHSN
CMS Overall Star Rating 40.0%
2 of 5 stars
Quality profile vs. the national benchmark
Mortality 7 measures
Safety of care 8 measures
Readmission 10 measures
Better than national Same as national Worse than national
Quality Measures
| Measure | Score | vs. National |
|---|---|---|
| Abdominopelvic accidental puncture or laceration rate | 2.01 | Worse than National |
| CMS Medicare PSI 90: Patient safety and adverse events composite | 1.14 | Same as National |
| Death rate among surgical inpatients with serious treatable complications | 222.42 | Worse than National |
| Death rate for CABG surgery patients | N/A | Not Available |
| Death rate for COPD patients | 7.5 | Same as National |
| Death rate for heart attack patients | 12 | Same as National |
| Death rate for heart failure patients | 9.3 | Better than National |
| Death rate for pneumonia patients | 13.3 | Better than National |
| Death rate for stroke patients | 16.6 | Worse than National |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality Rate | 3.5 | Better than National |
| Iatrogenic pneumothorax rate | 0.35 | Same as National |
| In-hospital fall-associated fracture rate | 0.22 | Same as National |
| Perioperative pulmonary embolism or deep vein thrombosis rate | 3.33 | Same as National |
| Postoperative acute kidney injury requiring dialysis rate | 1.37 | Same as National |
| Postoperative hemorrhage or hematoma rate | 2.76 | Same as National |
Patient Experience (HCAHPS)
Experience profile vs. the national average
Source: CMS Hospital Compare, HCAHPS patient survey star ratings.
| Survey Question | Star Rating |
|---|---|
| Cleanliness - linear mean score | N/A |
| Cleanliness - star rating | 3 |
| Communication about medicines - linear mean score | N/A |
| Communication about medicines - star rating | 2 |
| Discharge information - linear mean score | N/A |
| Discharge information - star rating | 4 |
| Doctor communication - linear mean score | N/A |
| Doctor communication - star rating | 3 |
| Nurse communication - linear mean score | N/A |
| Nurse communication - star rating | 3 |
| Overall hospital rating - linear mean score | N/A |
| Overall hospital rating - star rating | 3 |
| Quietness - linear mean score | N/A |
| Quietness - star rating | 3 |
| Recommend hospital - linear mean score | N/A |
| Recommend hospital - star rating | 4 |
| Summary star rating | 3 |
Safety & Infections
| Measure | Score | vs. National |
|---|---|---|
| Catheter Associated Urinary Tract Infections (ICU + select Wards) | 0.315 | Better than National |
| Central Line Associated Bloodstream Infection (ICU + select Wards) | 0.337 | Better than National |
| Clostridium Difficile (C.Diff) | 0.483 | Better than National |
| MRSA Bacteremia | 0.739 | Same as National |
| SSI - Abdominal Hysterectomy | 1.634 | Same as National |
| SSI - Colon Surgery | 2.392 | Worse than National |
Staffing & Spending
Unplanned Visits & Readmissions
| Measure | Score | vs. National |
|---|---|---|
| Acute Myocardial Infarction (AMI) 30-Day Readmission Rate | 13 | Same as National |
| Heart failure (HF) 30-Day Readmission Rate | 18.3 | Same as National |
| Hospital return days for heart attack patients | -15.6 | Average Days per 100 Discharges |
| Hospital return days for heart failure patients | -10.6 | Fewer Days Than Average per 100 Discharges |
| Hospital return days for pneumonia patients | 34.7 | More Days Than Average per 100 Discharges |
| Hybrid Hospital-Wide All-Cause Readmission Measure (HWR) | 13 | Better than National |
| Pneumonia (PN) 30-Day Readmission Rate | 16.5 | Same as National |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapy | 5.3 | Same as National |
| Rate of inpatient admissions for patients receiving outpatient chemotherapy | 10.8 | Same as National |
| Rate of readmission after hip/knee replacement | 3.4 | Better than National |
| Rate of readmission for CABG | N/A | Not Available |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patients | 18.3 | Same as National |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies) | 13.2 | Same as National |
| Ratio of unplanned hospital visits after hospital outpatient surgery | 1.1 | Same as National |
Medicare Spending
| Measure | Score |
|---|---|
| Medicare hospital spending per patient (Medicare Spending per Beneficiary) | 1.02 |
Maternal Health
| Measure | Score |
|---|---|
| Cesarean Birth | N/A |
| Maternal Morbidity Structural Measure | N/A |
| Risk Adjusted Severe Obstetric Complications (All) | N/A |
| Risk Adjusted Severe Obstetric Complications (excluding blood-transfusion-only cases) | N/A |
Nearby Hospitals in California
Other Medicare-certified hospitals in California.
60th Medical Group (Travis AFB)
Travis AFB, CA
No rating Acute Care - Department of Defense
Adventist Health and Rideout
Marysville, CA
2/5
Acute Care Hospitals
Adventist Health Bakersfield
Bakersfield, CA
2/5
Acute Care Hospitals
Adventist Health Clearlake
Clearlake, CA
2/5
Critical Access Hospitals
Adventist Health Delano
Delano, CA
2/5
Acute Care Hospitals
Adventist Health Hanford
Hanford, CA
3/5
Acute Care Hospitals
Compare John Muir Medical Center - Walnut Creek Campus vs 60th Medical Group (Travis AFB) →
Hospital Quality Guides
Frequently Asked Questions
How does John Muir Medical Center - Walnut Creek Campus compare to other hospitals on CMS star rating?
According to PlainHospital's CMS star-rating ranking, John Muir Medical Center - Walnut Creek Campus ranks #2608 of 3182 rated US hospitals by overall star rating (highest = #1). That ordinal matches our top-rated hospital listing (star_rating DESC). See /methodology#corpus-placement for the exact sort basis.
What is the CMS star rating for John Muir Medical Center - Walnut Creek Campus?
John Muir Medical Center - Walnut Creek Campus has an overall CMS star rating of 2 out of 5, below the 3.2-star national average.
How does John Muir Medical Center - Walnut Creek Campus perform on quality measures?
8 of 25 compared mortality, safety, and readmission measures rate better than the national average at John Muir Medical Center - Walnut Creek Campus; 5 rate worse.
What do patients say about John Muir Medical Center - Walnut Creek Campus?
John Muir Medical Center - Walnut Creek Campus reports 17 HCAHPS patient-experience domain scores. Star ratings range from 2 to 4 out of 5.
What are the infection rates at John Muir Medical Center - Walnut Creek Campus?
John Muir Medical Center - Walnut Creek Campus tracks 6 healthcare-associated infection types (CDC NHSN). 3 are better than the national benchmark, 1 are worse, and 2 are at the national average.
Does John Muir Medical Center - Walnut Creek Campus have emergency services?
Yes, John Muir Medical Center - Walnut Creek Campus provides emergency services.
What type of hospital is John Muir Medical Center - Walnut Creek Campus?
John Muir Medical Center - Walnut Creek Campus is a Acute Care Hospitals facility with Voluntary non-profit - Other ownership, located in Walnut Creek, CA. This facility has received the CMS Birthing-Friendly designation.
How much does Medicare spend at John Muir Medical Center - Walnut Creek Campus?
1 Medicare spending category is on file for John Muir Medical Center - Walnut Creek Campus, per episode vs. the national median.
Does John Muir Medical Center - Walnut Creek Campus offer maternal health services?
Yes, John Muir Medical Center - Walnut Creek Campus reports 4 maternal health measures. This facility has been designated as Birthing-Friendly by CMS.
Data Sources
Source: Centers for Medicare & Medicaid Services (CMS) Hospital Compare. Last refreshed from CMS: . About PlainHospital
Read our methodology & full data source list
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