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Acute Care Hospital

Adventist Health Simi Valley

Simi Valley, California · Ventura County · Emergency services listed

Adventist Health Simi Valley is an acute care hospital at 2975 N Sycamore Dr, Simi Valley, CA 93065. Phone: (805) 955-6000. It has an emergency department. Medicare overall rating: 2 of 5 stars (CMS, October 2026).

Data as of October 26, 2026. Source: CMS Hospital General Information and the hospital’s website (checked October 30, 2026).

Summary

Adventist Health Simi Valley is an acute care hospital in Simi Valley, California. Medicare data lists emergency services. CMS overall star rating: 2 of 5 stars. Its official website lists 83 services, specialties and programs. Medicare lists 427 affiliated clinicians. Source: CMS Hospital General Information, data updated 2026-10-26.

What is an acute care hospital?

A general hospital for short-term care: emergencies, surgery, illness and injury. Most patients stay a few days. More about hospital types

Call(805) 955‑6000 Directions Website Medicare profile
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Profile from official sources

Built from official Medicare (CMS) data and the hospital’s own website (checked 2026-10-30). Every service links to the page that lists it. Services change: call the hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

YesEmergency services
2 of 5 stars2 of 5 stars · Medicare rating
136Beds (hospital website)
427Doctors and clinicians
83Services listed

Quick answers

Does Adventist Health Simi Valley have an emergency room?
Yes. Medicare (CMS) data lists emergency services at Adventist Health Simi Valley. In a medical emergency, call 911.
Where is Adventist Health Simi Valley?
2975 N Sycamore Dr, Simi Valley, CA 93065, in Ventura County, California.
What is the phone number of Adventist Health Simi Valley?
(805) 955-6000, as listed by Medicare (CMS).
What is the Medicare star rating of Adventist Health Simi Valley?
2 out of 5 stars in the CMS overall hospital quality rating (CMS data updated 2026-10-26).
Does Medicare reduce its payments to Adventist Health Simi Valley for hospital-acquired conditions?
Yes. For fiscal year 2026, CMS applies a 1-percent reduction to Medicare payments to Adventist Health Simi Valley under the Hospital-Acquired Condition Reduction Program (Total HAC Score: 0.3861; a lower score is better). It is an adjustment to what Medicare pays the hospital, not a charge to patients (CMS data released January 26, 2026).

Specialties and care areas[4][7][8][11][12][13]

Conditions treated[6][7][8][12][14][15][16]

Treatments[6][11][12][14][15][16]

  • Robotic surgery
  • Robotic hip and knee joint replacement
  • Cardiac rehabilitation
  • Radiation therapy (IMRT, SBRT, SRS)
  • Medication management for heart conditions
  • Pelvic floor exercises and bladder training

Procedures[12][13][15][16]

Programs and centers[4][6][7][8][9][11][12][16]

  • Primary Stroke Center
  • Robotic Surgery Center of Excellence (SRC)
  • Chest Pain Accreditation (ACC)
  • Geriatric Emergency Department Accreditation (ACEP)
  • Nancy Reagan Breast Center (ACR Comprehensive Breast Imaging Center)
  • Child Development Center
  • Cardiac catheterization lab
  • Heart health monitoring
  • Cancer nurse navigator program
  • Breast Imaging Center of Excellence

Emergency care (hospital website)[7][8]

Emergency roomYes
Open 24/7Yes
Stroke designationPrimary Stroke Center (DNV)

Visiting and practical information

VisitingVisitors welcome 8 a.m.-8 p.m. daily[5]
ParkingFree parking for patients, visitors and employees[5]
Interpreters and languagesFree interpreters: Spanish staff or phone, ASL video, other languages via Language Line[10]
Patient portalAdventist Health MyChart

Recognition[6][7][8]

  • The Joint Commission accredited hospital
  • DNV Primary Stroke Center certification
  • Chest Pain Accreditation (American College of Cardiology)
  • Blue Distinction Center for Knee and Hip Replacement
  • ACR Accredited Breast Center of Excellence
  • Leapfrog Grade B (Spring 2024)
  • AHA Get With The Guidelines STEMI Receiving Center Gold
  • AHA Get With The Guidelines Stroke Gold Plus
  • Target: Stroke Honor Roll Elite
  • Geriatric Emergency Department Accreditation (American College of Emergency Physicians)

Doctors and clinicians (427)

427 doctors and other clinicians list Adventist Health Simi Valley as a hospital where they work, in Medicare's official clinician data (updated 2026-10-02). It is not a complete staff list.

Main specialties

Doctors with a page on this site (427)

And 403 more: the button below opens the full list.

Other emergency rooms nearby

Hospitals that list emergency services, by straight-line distance (not driving distance).

Find the closest emergency room to where you are → · Compare ER wait times

Other hospitals near Simi Valley

Hospitals in Ventura County · Hospitals near me

Nursing homes, hospice, home health and dialysis nearby

Medicare-certified providers within 25 miles, by straight-line distance. Hospice and home health care is given at home: their address is the office.

Nursing homes

All nursing homes in the state →

Hospice providers

All hospice providers in the state →

Home health agencies

All home health agencies in the state →

Dialysis facilities

All dialysis facilities in the state →

Outpatient surgery centers nearby

Medicare-certified ambulatory surgery centers within 25 miles, by straight-line distance.

All outpatient surgery centers in the state →

Community care nearby

Health centers, clinics, urgent care and pharmacies closest to this hospital, by straight-line distance, from official HRSA, Medicare and NPI Registry data. In a medical emergency, call 911.

Community health centers

Clinics and urgent care

Pharmacies

Assisted living nearby

Licensed homes from the official state license list, by straight-line distance.

About the Medicare star rating

CMS (the federal Medicare agency) gives many hospitals an overall rating from 1 to 5 stars, based on measures of mortality, safety, readmissions, patient experience and timely care. It is one piece of information: ask your doctor what matters for your care. See the full Medicare profile →

Medicare quality data

What Adventist Health Simi Valley reported to Medicare (CMS), the federal agency that publishes these results for hospitals nationwide. These are averages for many patients, not a prediction for any one person: ask your doctor what matters for your care. In a medical emergency, call 911.

What patients said (patient survey)

What this means: Patients who stayed overnight answered a national survey (HCAHPS) about their stay. More stars mean patients reported a better experience than at other hospitals. The percentages show how often patients gave the best answer, next to the national average.

Summary star rating (all survey topics) 3 of 5 stars
Overall rating of the hospital3 of 5 stars
Would recommend the hospital3 of 5 stars
Nurses communicated well3 of 5 stars
Doctors communicated well2 of 5 stars
Patients got help quickly from staff2 of 5 stars
Staff explained medicines2 of 5 stars
Information about recovery at home3 of 5 stars
Room and bathroom kept clean5 of 5 stars
Restfulness of Environment2 of 5 stars
Care Coordination2 of 5 stars
Symptoms After Stay2 of 5 stars
Rated the hospital 9 or 10 out of 1068%National average: 72%
Would definitely recommend the hospital68%National average: 71%
Nurses “always” communicated well79%National average: 80%
Doctors “always” communicated well72%National average: 80%
“Always” got help as soon as they wanted54%National average: 64%
Staff “always” explained medicines before giving them58%National average: 62%
Were given information about recovery at home86%National average: 86%
Room and bathroom “always” clean81%National average: 73%
Completed surveys493Response rate: 24%

Source: Patient survey (HCAHPS) - Hospital — CMS, released October 19, 2026; patients discharged January 2025 to December 2025.

Infections caught in the hospital

What this means: CMS compares the number of infections patients caught in this hospital with the number expected for a hospital like it. The number shown is that ratio: below 1 means fewer infections than expected, above 1 means more. “Better” or “worse” is shown only when the difference is clear in the data.

Central line bloodstream infections (CLABSI)3.64Worse than the national benchmark
Catheter-associated urinary tract infections (CAUTI)0No different from the national benchmark
MRSA bloodstream infections0.734No different from the national benchmark
Clostridioides difficile (C. diff) intestinal infections0.475No different from the national benchmark
Not reported to MedicareSurgical site infections after colon surgery; Surgical site infections after abdominal hysterectomy

Source: Healthcare Associated Infections - Hospital — CMS, released October 19, 2026; data from January 2025 to December 2025.

Complications and deaths

What this means: Death rates are the share of patients who died within 30 days of going into the hospital for that condition, adjusted for how sick they were. PSI-90 combines several serious complications (a lower number is better). “No different from the national rate” is the most common result and means the hospital is in line with hospitals nationwide.

Deaths within 30 days: heart attack patients11.4%
Deaths within 30 days: heart failure patients9.4%
Deaths within 30 days: pneumonia patients13.5%
Deaths within 30 days: COPD patients6.8%
Deaths within 30 days: stroke patients10%
Serious complications (patient safety indicator PSI-90)0.91No different from the national rate
Complications after hip or knee replacement5%
Not reported to MedicareDeaths within 30 days: coronary bypass surgery (CABG)

Source: Complications and Deaths - Hospital — CMS, released October 20, 2026; data from July 2022 to June 2025.

Return visits to the hospital (readmissions)

What this means: The share of patients who had to be admitted to a hospital again within 30 days after going home, adjusted for how sick they were. A lower percentage is better.

Returned to any hospital within 30 days (all patients)17.8%
Readmitted within 30 days: heart attack14.8%
Readmitted within 30 days: heart failure22.5%
Readmitted within 30 days: pneumonia18.4%
Readmitted within 30 days: COPD19.5%
Readmitted within 30 days: hip or knee replacement5.6%
Not reported to MedicareReadmitted within 30 days: coronary bypass surgery

Source: Unplanned Hospital Visits - Hospital — CMS, released October 20, 2026; data from July 2024 to June 2025.

Emergency room times and sepsis care

What this means: ER time is the middle (median) time from arriving at the emergency room to leaving it; busier ERs usually have longer times, so the ER volume is shown too. Leaving before being seen: a lower percentage is better. Sepsis is a life-threatening reaction to an infection; a higher percentage means more patients got every recommended early step.

Emergency room volume (patients per year)High (40,000–59,999)
Average (median) time patients spent in the emergency room before leaving (OP-18b)177 minutesNational average: 162 minutes
Patients who left the emergency room before being seen (OP-22)1%National average: 2%
Sepsis patients who got all the recommended early care (SEP-1)78%National average: 66%

Source: Timely and Effective Care - Hospital — CMS, released October 19, 2026; data from January 2024 to December 2024.

See every measure on Medicare Care Compare →

Medicare payment programs

Medicare (CMS) uses these federal programs to adjust what it pays hospitals, based on quality, safety and cost results. This is a payment to the hospital for Medicare patients, not a price you pay, and not a prediction for any one person. Results for Adventist Health Simi Valley, fiscal year 2026 (October 2025 to September 2026).

Show the Medicare payment program results

Hospital-Acquired Condition Reduction Program

What this means: Medicare gives each hospital a Total HAC Score built from patient-safety complications and from infections caught in the hospital. The quarter of hospitals with the highest (worst) scores gets a reduction in its Medicare payments. A lower score is better.

CMS says: Hospitals with a Total HAC Score above the 75th percentile of the Total HAC Score distribution will be subject to a 1-percent payment reduction.

Medicare payment reduction, fiscal year 2026YesCMS applies a 1-percent payment reduction to this hospital.
Total HAC Score0.3861Lower is better. Hospitals above the 75th percentile of all scores get the reduction.

Source: Hospital-Acquired Condition (HAC) Reduction Program — CMS, released January 26, 2026; patient-safety data from July 2022 to June 2024 and infection data from January 2023 to December 2024.

Hospital Readmissions Reduction Program

What this means: For six conditions, Medicare compares how often this hospital’s patients had to go back into a hospital within 30 days with how often that happens at an average hospital with similar patients. The ratio is that comparison: 1 means as many readmissions as expected, above 1 means more than expected (CMS calls these “excess readmissions”), below 1 means fewer.

CMS says: In October 2012, CMS began reducing Medicare payments for subsection(d) hospitals with excess readmissions under the Hospital Readmissions Reduction Program (HRRP).

Heart attack1.0506More readmissions than expected
Heart failure1.1126More readmissions than expected
Pneumonia1.0982More readmissions than expected
COPD (chronic lung disease)0.9478Fewer readmissions than expected
Hip or knee replacement1.1557More readmissions than expected
No result publishedCoronary bypass surgery (CABG) (not reported, or too few cases)

Source: Hospital Readmissions Reduction Program — CMS, released January 26, 2026; patients discharged July 2021 to June 2024.

Hospital Value-Based Purchasing Program

What this means: Medicare scores hospitals in four areas, each from 0 to 100, and combines them into a Total Performance Score from 0 to 100. A higher score means better results on these measures. Medicare uses the score to adjust what it pays the hospital.

CMS says: This program adjusts payments to hospitals under the Inpatient Prospective Payment System (IPPS) based on the quality of care they deliver.

Total Performance Score28.75 out of 100Median of the 2,455 hospitals in the program: 29.50
Clinical outcomes (deaths and complications)34.00 out of 100
Person and community engagement (patient survey)31.00 out of 100
Safety (infections and sepsis care)50.00 out of 100
Efficiency and cost reduction (Medicare spending)0.00 out of 100

Source: Hospital Value-Based Purchasing (HVBP) - Total Performance Score — CMS, released January 26, 2026, fiscal year 2026. Program description: The Hospital Value-Based Purchasing (VBP) Program — CMS, page last modified September 10, 2024.

Medicare spending per patient (MSPB)

What this means: This compares what Medicare spent on a hospital stay, counting the 3 days before it and the 30 days after, with the national median hospital, after adjusting for the patient’s age and health and for local prices. A ratio of 1.00 is the national median hospital; below 1.00 means Medicare spent less, above 1.00 means more. It measures the cost to Medicare, not the quality of care.

CMS says: The Medicare Spending Per Beneficiary (MSPB) Measure shows whether Medicare spends more, less, or about the same for an episode of care (episode) at a specific hospital compared to all hospitals nationally.

Medicare spending per patient, ratio1.00Same as the national median hospital

Source: Medicare Spending Per Beneficiary - Hospital — CMS, released October 19, 2026; data from January 2024 to December 2024.

ER wait times and Medicare ratings nearby

How this hospital compares with others in the area, ranked only by official Medicare (CMS) numbers.

ER wait times in CaliforniaBest hospitals in California

Prices

We have not been able to read a price file for Adventist Health Simi Valley yet. Every US hospital must publish its standard charges online (federal price transparency rule): look for “price transparency” or “standard charges” on the hospital’s website, or call the hospital and ask for an estimate. In a medical emergency, call 911.

Hospital information

Hospital typeAcute Care Hospital
Address2975 N Sycamore Dr, Simi Valley, CA 93065
CountyVentura County
StateCalifornia
Phone(805) 955‑6000
Emergency servicesYes
OwnershipVoluntary non-profit - Private
Medicare overall rating2 of 5 stars
CMS Certification Number050236
Name in Medicare recordsADVENTIST HEALTH SIMI VALLEY
Profile levelMedicare data + hospital website
Official websiteadventisthealth.org
CorrectionsReport an error or suggest an update →

Sources

  1. Hospital General Information — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-26, retrieved 2026-11-13
  2. Medicare Care Compare — official Medicare profile of this hospital
  3. U.S. Census Bureau Geocoder — map position used for distances

From the hospital’s website

Numbers match the citations above. Checked 2026-10-30.

  1. Adventist Health Simi Valley — adventisthealth.org
  2. Visitor Information — adventisthealth.org
  3. Accreditations and Awards — adventisthealth.org
  4. Emergency Care — adventisthealth.org
  5. Stroke Care — adventisthealth.org
  6. About Us — adventisthealth.org
  7. Translation Services — adventisthealth.org
  8. Cancer Care - Simi Valley - Adventist Health — adventisthealth.org
  9. Heart Care - Simi Valley - Adventist Health — adventisthealth.org
  10. Imaging - Simi Valley - Adventist Health — adventisthealth.org
  11. Orthopedics and Sports Medicine - Simi Valley - Adventist Health — adventisthealth.org
  12. Surgery - Simi Valley - Adventist Health — adventisthealth.org
  13. Women's Health - Simi Valley - Adventist Health — adventisthealth.org