Source: CMS Care Compare, October 2026 releaseER figures are medians, not live waitsAbout the data
Visiting John Muir Medical Center - Walnut Creek Campus
Walnut Creek, CA 94598
County: Contra Costa Directions Apple Maps Call (925) 939-3000
- Photo ID and your insurance, Medicare or Medicaid card
- A list of your medicines, doses and allergies
- Your doctor's name and phone number
- A phone charger
Official links: Website for John Muir Medical Center - Walnut Creek Campus (opens the hospital's site)
Nearby hospitals
- 1.2mi John Muir/Mt Diablo Health System Walnut Creek, CA · Emergency room Call John Muir/Mt Diablo Health System Directions to John Muir/Mt Diablo Health System (Google Maps) Details for John Muir/Mt Diablo Health System
- 1.7mi Kaiser Foundation Hospital - Walnut Creek Walnut Creek, CA · Emergency room Call Kaiser Foundation Hospital - Walnut Creek Directions to Kaiser Foundation Hospital - Walnut Creek (Google Maps) Details for Kaiser Foundation Hospital - Walnut Creek
- 4.9mi John Muir Medical Center - Concord Campus Concord, CA · Emergency room · median ER visit 2 hr 27 min Call John Muir Medical Center - Concord Campus Directions to John Muir Medical Center - Concord Campus (Google Maps) Details for John Muir Medical Center - Concord Campus
Quick answers about John Muir Medical Center - Walnut Creek Campus
How long is the ER wait at John Muir Medical Center - Walnut Creek Campus?
CMS doesn't publish live wait times. Over the 12 months CMS reported, patients treated and sent home spent a median of 2 hr 55 min in the John Muir Medical Center - Walnut Creek Campus emergency room (the average across California hospitals is 3 hr). 1% of ER patients left before being seen. For tonight's wait, check the hospital's website (opens the hospital's own site) or call (925) 939-3000. In an emergency, call 911.
What is the phone number for John Muir Medical Center - Walnut Creek Campus?
The main phone number for John Muir Medical Center - Walnut Creek Campus is (925) 939-3000, from Medicare's hospital records.
Call (925) 939-3000What is the address of John Muir Medical Center - Walnut Creek Campus?
John Muir Medical Center - Walnut Creek Campus is at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598.
Directions (opens Google Maps)Does John Muir Medical Center - Walnut Creek Campus have an emergency room?
Yes. John Muir Medical Center - Walnut Creek Campus has an emergency department, according to Medicare data.
What is John Muir Medical Center - Walnut Creek Campus' Medicare star rating?
John Muir Medical Center - Walnut Creek Campus has an overall rating of 2 out of 5 stars from the Centers for Medicare & Medicaid Services (CMS). Star ratings come from CMS quality and safety measures, not patient reviews.
Quality and performance
Centers for Medicare & Medicaid Services · data as of October 2026
Patients treated and sent home from the emergency department at John Muir Medical Center - Walnut Creek Campus spend a median of 2 hours 55 minutes there. That is 5 minutes shorter than the average across California hospitals (3 hours).
Source: CMS Hospital General Information and Timely & Effective Care. Wait times are a median over a past 12-month reporting period, not live data. Not affiliated with CMS or with John Muir Medical Center - Walnut Creek Campus. For a medical emergency, call 911.
Compare ER waits across California · How California hospitals rank on star ratings · Other birthing-friendly hospitals in California · How we source this data · Something wrong on this page? Tell us
What patients say
CMS patient survey (HCAHPS) · 785 completed surveys · patients discharged Jan 2025 – Dec 2025
Patients gave John Muir Medical Center - Walnut Creek Campus a 3-star patient experience rating out of 5. 76% would definitely recommend it (U.S. average 71%). 69% rated it 9 or 10 out of 10.
The patient survey (HCAHPS) asks a random sample of adult patients about their recent hospital stay. CMS adjusts the results for the mix of patients and how the survey was done, so hospitals can be compared fairly. About the data.
Compare John Muir Medical Center - Walnut Creek Campus
Infections, complications and deaths
Centers for Medicare & Medicaid Services · compared with hospitals nationwide
Of the 6 hospital-acquired infections CMS could compare, John Muir Medical Center - Walnut Creek Campus was better than the national benchmark on 1 and worse on 0. Its rate of serious complications was worse than national.
Hospital-acquired infections
Serious complications
Death rates within 30 days
| Patients treated for | This hospital | U.S. |
|---|---|---|
| Heart attack patients | 10.0% | 11.9% |
| Heart failure patients | 9.8% | 11.1% |
| Pneumonia patients | 12.5% | 15.2% |
| Stroke patients | 14.1% | 11.9% |
| COPD patients | 6.4% | 8.6% |
| Hospital-wide, all conditions | 3.4% | 3.9% |
Risk-adjusted rates. CMS has not published a statistical better/worse comparison for these death rates in the current release, so small differences from the U.S. rate may be chance.
Other complications
All 11 complication measures
| Measure | This hospital | U.S. | CMS comparison |
|---|---|---|---|
| Complications after hip or knee replacement% of patients | 3.9 | 4.1 | Not compared |
| Pressure ulcers (bed sores)per 1,000 patients | 1.12 | 0.55 | Worse than national |
| Falls in the hospital that caused a broken boneper 1,000 patients | 0.23 | 0.24 | Same as national |
| Collapsed lung caused by a medical procedureper 1,000 patients | 0.32 | 0.18 | Same as national |
| Bleeding or blood clot under the skin after surgeryper 1,000 patients | 3.73 | 2.25 | Worse than national |
| Kidney injury needing dialysis after surgeryper 1,000 patients | 1.3 | 1.56 | Same as national |
| Respiratory failure after surgeryper 1,000 patients | 8.2 | 8.15 | Same as national |
| Blood clots in the lungs or legs after surgeryper 1,000 patients | 3.37 | 3.31 | Same as national |
| Bloodstream infection (sepsis) after surgeryper 1,000 patients | 6.45 | 4.89 | Same as national |
| Surgical wound splitting openper 1,000 patients | 1.82 | 1.7 | Same as national |
| Accidental cuts or tears during abdominal surgeryper 1,000 patients | 1.26 | 1.04 | Same as national |
"Better" or "worse" means CMS found the difference from the national benchmark statistically significant; most hospitals are "no different". Infection results compare the infections a hospital reported with the number predicted for a hospital of its size and type (a ratio below 1 means fewer than predicted), for Jan 2025 – Dec 2025. Death and complication rates are risk-adjusted for how sick patients were. Each death rate counts deaths within 30 days of a hospital stay, pooled over one to three years of Medicare patients depending on the measure. About the data.
Health insurance at John Muir Medical Center - Walnut Creek Campus
Original Medicare: Medicare-certified, so it can bill Original Medicare (Medicare number 050180). Medicare Advantage plans have their own networks, which this section does not cover.
California runs its own exchange, Covered California. Check its provider directory for John Muir Medical Center - Walnut Creek Campus.
Source: the insurers' 2027 machine-readable provider files listed in the CMS Marketplace public use files, loaded November 4, 2026, matched to hospitals by NPI from CMS Hospital Enrollments. How we match networks to hospitals Networks change; confirm with your insurer before you go.
Readmissions and return visits
Centers for Medicare & Medicaid Services · Medicare patients · Jul 2024 – Jun 2025
On the 4 readmission and return-visit measures CMS could compare, John Muir Medical Center - Walnut Creek Campus was no different from the national rate or its expected level.
Back in the hospital within 30 days
| After a stay for | This hospital | U.S. | CMS comparison |
|---|---|---|---|
| All conditions (hospital-wide)Medicare patients back in any hospital within 30 days of leaving. | 15.1% | 16.2% | Not compared |
| Heart attack | 14.7% | 14.4% | Not compared |
| Heart failure | 19.9% | 21.3% | Not compared |
| Pneumonia | 16.7% | 17.3% | Not compared |
| COPD (chronic lung disease) | 20.4% | 20% | Not compared |
| Hip or knee replacement | 4.9% | 5.8% | Not compared |
Return trips after a stay or procedure
Medicare's readmission program
Excess readmission ratio: this hospital's predicted readmissions divided by the number expected for a typical hospital with the same patients. Above 1.00 means more readmissions than expected. 2 of 5 conditions are above 1.00.
| Condition | Ratio | Patients | Readmissions |
|---|---|---|---|
| Pneumonia | 1.033 | 736 | More than expected |
| COPD | 1.008 | 129 | More than expected |
| Heart attack | 0.955 | – | Fewer than expected |
| Heart failure | 0.931 | 723 | Fewer than expected |
| Hip or knee replacement | 0.694 | 677 | Fewer than expected |
Readmission rates count Medicare patients who were admitted to any acute-care hospital within 30 days of leaving this one, adjusted for how sick they were. "Better" or "worse" means CMS found the difference from the national rate statistically significant; most hospitals are "no different". Return-day and outpatient-surgery measures compare the hospital with what CMS expected for its own patients. The Readmissions Reduction Program ratios are shown as CMS publishes them; whether a hospital's payments are reduced depends on how its ratios compare with similar hospitals, so a ratio above 1.00 alone doesn't mean a penalty. About the data.
Timely and effective care
Centers for Medicare & Medicaid Services · all patients unless noted · Jan 2025 – Dec 2025
John Muir Medical Center - Walnut Creek Campus's emergency department is classed by CMS as very high volume.
| Measure | This hospital | U.S.* |
|---|---|---|
| Sepsis: got all recommended early treatmentPatients with severe sepsis or septic shock who received every step of the recommended early care bundle. Higher is better. 105 patients. | 55% | 66% |
| Septic shock: full treatment within 3 hoursHigher is better. 37 patients. | 62% | 75% |
| Stroke: brain scan read within 45 minutes of ER arrivalPatients arriving with stroke symptoms whose head CT or MRI was interpreted within 45 minutes. Higher is better. 17 patients. | 71% | 69% |
| Typical time in the ER before going homeMedian minutes from arrival to leaving, for ER patients sent home (not counting mental health patients or transfers). Lower is better. 371 patients. | 175 min | 162 min |
| Patients who left the ER before being seenLower is better. 66,500 patients. | 1% | 2% |
| Health care workers vaccinated against fluHigher is better. 4,786 patients. | 56% | 77% |
| Discharged on two opioids, or an opioid and a benzodiazepinePatients sent home with prescriptions that raise the risk of overdose when combined. Lower is better. 8,064 patients. | 19% | 16% |
| Colonoscopy: right follow-up interval for average-risk patientsHigher is better. 22 patients. | 86% | 93% |
| Blood clot prevention given in intensive careHigher is better. 2,415 patients. | 98% | 97%* |
CMS publishes these process-of-care measures without a better/worse verdict, so the U.S. figure is shown for context; small differences, or results based on few patients, may not mean much. *Median of all hospitals CMS reports, where CMS publishes no national figure. About the data.
Maternity care
Centers for Medicare & Medicaid Services · reported by the hospital · Jan 2025 – Dec 2025
Maternity measures are reported by hospitals that deliver babies. The U.S. figure is the median of the hospitals CMS reports, not a CMS verdict. About the data.
Medicare spending and payment programs
Centers for Medicare & Medicaid Services
Value-based purchasing scores by area
| Area | Score (out of 100) |
|---|---|
| Clinical outcomesDeath rates and complications | 40 |
| Patient experiencePatient survey results | 17 |
| SafetyHospital-acquired infections | 21.7 |
| Efficiency and costMedicare spending per patient | 0 |
The Hospital-Acquired Condition Reduction Program cuts Medicare payments by 1% for the quarter of hospitals with the worst scores. The Hospital Value-Based Purchasing Program withholds a small share of every hospital's Medicare payments and pays it back according to the total performance score. A spending ratio of 1.00 equals the national median; spending reflects prices, the services patients received and care after discharge, not quality. Some hospitals, such as critical access, children's and cancer hospitals, are not part of these programs. About the data.
Care after a stay at John Muir Medical Center - Walnut Creek Campus
Medicare-certified providers near this hospital, with their CMS ratings. A hospital discharge planner can make the referral.
Skilled nursing facilities nearby
- 0.5mi La Casa Via Transitional Care Center Walnut Creek, CA · 99 beds Medicare overall 5 of 5 stars · Short-stay quality 5 of 5
- 0.5mi Tampico Healthcare Center Walnut Creek, CA · 128 beds Medicare overall 4 of 5 stars · Short-stay quality 4 of 5
- 1.7mi Shadelands Post Acute Walnut Creek, CA · 59 beds Medicare overall 4 of 5 stars · Short-stay quality 5 of 5
Skilled nursing ratings and inspections at Nursing Homes In Each State
Dialysis centers nearby See more
- 1.5mi Fresenius Medical Care - Diablo Walnut CreekWalnut Creek, CA
- 1.5mi DaVita Walnut Creek Dialysis CenterWalnut Creek, CA
- 1.5mi DaVita Walnut Creek at HomeWalnut Creek, CA Not rated
Home health agencies nearby See more
- 1.5mi Comfort Assisting, INCWalnut Creek, CA · 80% would recommend
- 1.7mi Compassionate Home HealthWalnut Creek, CA
- 1.7mi Athome Healthcare Team - East BayWalnut Creek, CA
Hospice care providers nearby See more
- 1.5mi Vitas Healthcare Corporation of CaliforniaWalnut Creek, CA · 70% would recommend
- 1.5mi Prohealth Home Care, INCWalnut Creek, CA · 67% would recommend Not rated
- 1.7mi Alameda Care HospiceWalnut Creek, CA · 88% would recommend
Source: CMS Care Compare. Distances are approximate.
Inpatient rehabilitation unit
CMS Inpatient rehabilitation Quality Reporting Program, data through December 2025 · unit CCN 05T180
John Muir Medical Center - Walnut Creek Campus runs an inpatient rehabilitation unit that reports its own results to Medicare. Returned home or to the community: 74% here, against 67% nationally. CMS rates it better than national on returned home or to the community.
Results
Safety
Cost
Source: CMS Inpatient rehabilitation Quality Reporting Program (Provider Data Catalog). Better/worse labels appear only where CMS itself compared the facility with the national rate; other figures are shown next to the national figure for context.
Doctors at John Muir Medical Center - Walnut Creek Campus
780 Medicare-enrolled doctors and other clinicians list this hospital as an affiliation, across 32 specialties.
Find doctors in Walnut Creek
Medicare-enrolled specialists with a practice in Walnut Creek, with addresses, phone numbers and the hospitals they work with.
Federal rules require hospitals to publish their prices, including the rates they've negotiated with each insurer and their cash prices. John Muir Medical Center - Walnut Creek Campus lists them here:
From the hospital's price transparency file (www.johnmuirhealth.com/cms-hpt.txt), checked Nov 7, 2026. For an estimate of what you'll pay, ask the hospital or your insurer; Medicare's averages are on our procedure cost pages.
What Medicare paid at John Muir Medical Center - Walnut Creek Campus
Centers for Medicare & Medicaid Services · original Medicare patients · 2024
Average hospital charges and actual payments for the procedures Medicare patients most often had here, compared with the average for California.
Hospital stays
| Stay | Stays | Avg billed | Avg payment (Medicare + patient) | vs state |
|---|---|---|---|---|
| Septicemia or severe sepsis without ventilator >96 hours with major complicationsDRG 871 | 522 | $217,186 | $24,335 | +6% |
| Heart failure and shock with major complicationsDRG 291 | 282 | $147,957 | $15,320 | −1% |
| Major hip and knee joint replacement or reattachment of lower extremity without major complicationsDRG 470 | 244 | $200,134 | $21,619 | same |
| Respiratory infections and inflammations with major complicationsDRG 177 | 169 | $185,207 | $19,122 | same |
| Septicemia or severe sepsis without ventilator >96 hours without major complicationsDRG 872 | 126 | $100,525 | $12,269 | −2% |
| Simple pneumonia and pleurisy with major complicationsDRG 193 | 118 | $160,429 | $15,009 | same |
| Renal failure with complicationsDRG 683 | 113 | $92,956 | $10,172 | −6% |
| Medical back problems without major complicationsDRG 552 | 111 | $96,787 | $10,536 | −8% |
Outpatient services
| Service | Services | Avg billed | Avg allowed |
|---|---|---|---|
| Comprehensive Observation ServicesAPC 8011 | 598 | $63,665 | $3,806 |
| Level 2 Excision/Biopsy/Incision and DrainageAPC 5072 | 499 | $17,843 | $2,254 |
| Level 2 Upper GI ProceduresAPC 5302 | 243 | $38,562 | $2,649 |
| Level 3 Vascular ProceduresAPC 5183 | 111 | $49,633 | $4,438 |
| Level 3 Pacemaker and Similar ProceduresAPC 5223 | 96 | $117,995 | $14,840 |
Charges are the hospital's list prices; payments are what Medicare, the patient and any other insurer actually paid (for outpatient services, Medicare's allowed amount). Private insurance prices differ. "vs state" compares this hospital's average payment with the state average for the same stay. All procedure costs.
Size and finances
Medicare cost report · fiscal year ending Dec 2024
As reported by the hospital to CMS; not audited. Operating margin is income from patient care divided by net patient revenue and leaves out investment income and donations. Compare California hospital finances.
Who owns John Muir Medical Center - Walnut Creek Campus
Medicare enrollment and ownership records (PECOS)
Medicare lists the hospital's legal name as John Muir Health, a non-profit organization, incorporated 1958.
1,183 doctors and other clinicians list John Muir Medical Center - Walnut Creek Campus as a hospital affiliation in Medicare's clinician directory.
Organizations with 5% or more ownership (directly or through other companies), partnership interests or operational control, as the hospital reported them to Medicare. Records can lag behind recent sales. Individuals are not listed. Who owns America's hospitals.
Non-profit finances
IRS Form 990 · tax year ending Dec 2023 · John Muir Health (EIN 94-1461843)
As filed with the IRS by John Muir Health, which also files for 1 other hospital listed here, so the figures cover more than this hospital. Matched by name and address, so check the filing to confirm it's the right organization. See the full Form 990 filings · Non-profit hospital finances.
The area around John Muir Medical Center - Walnut Creek Campus
HRSA shortage designations and BLS pay data
Mental health: Parts of Contra Costa are federally designated health professional shortage areas (5 designations). Highest shortage score 13.
Dental: Parts of Contra Costa are federally designated health professional shortage areas (2 designations). Highest shortage score 17.
Nurse pay: registered nurses in California earn a median $140,270 a year. Healthcare salaries in California.
Shortage areas are designated by the Health Resources and Services Administration where there are too few primary care, mental health or dental providers for the population; scores run from 0 to 25 for primary and mental health care and 0 to 26 for dental care, higher meaning greater need. California shortage areas
Closest other hospitals
Healthcare pay in California
Registered nurses across California (all employers) earned a median of $140,270 a year (BLS, May 2025).Registered Nurse (RN) salary in CaliforniaNurse Practitioner salary in CaliforniaRespiratory Therapist salary in CaliforniaHealthcare salaries in California
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Cite this data
Writing about John Muir Medical Center - Walnut Creek Campus? You're welcome to quote these figures. They are free to use under CC BY 4.0: please credit HospitalsInEachState.com and link to this page.