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
- 6th pct.
- national percentile
- #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). That corpus rank reflects a below-median CMS star rating nationally, with 8 quality measures beating the national benchmark (5 worse).
- 6th pct.
- CMS star rating vs 3,182 rated US hospitals
- #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 Among the lowest higher than 6% of 3,182 rated hospitals
CMS star rating (1–5 stars), bucketed by value
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 and 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 Center - Walnut Creek Campus
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
Better-than-national profile for John Muir Medical Center
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 (Above average) |
Maternal Health
CMS maternal-care measures reported for this facility. The Hospital Compare maternal extract lists measure names and reporting windows; it does not publish numeric scores or sample sizes in the corpus we ingest, so those columns are omitted rather than filled with N/A.
| Measure |
|---|
| Cesarean Birth |
| Maternal Morbidity Structural Measure |
| Risk Adjusted Severe Obstetric Complications (All) |
| Risk Adjusted Severe Obstetric Complications (excluding blood-transfusion-only cases) |
Nationwide hospitals with similar CMS profiles
Peer sets for John Muir Medical Center - Walnut Creek Campus outside California, keyed to the strong better-than-national share.
Similar CMS star rating
Nearest overall stars outside CA (2/5 here).
Similar mortality outcomes
Nearest mortality measures rated better than national, outside CA (3 better here).
Nearby Hospitals in California
Other Medicare-certified hospitals in California.
One of 377 Medicare-certified hospitals in California, 6 are shown here.
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) →
What to do with John Muir Medical Center
Use this page's CMS-sourced figures as a starting filter, not a final verdict.
- See how every California hospital compares on star rating and the same quality measures. California hospitals
- Compare John Muir Medical Center directly against another hospital, measure by measure. Compare hospitals
- Check whether a device used in your care has a reported FDA adverse-event history. Search devices
CMS Hospital Compare figures are informational only, not medical advice; always consult your care team.
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.
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 (low-band), 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 (strong better-share tercile); 5 rate worse (elevated).
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.