SSM St Joseph Hospital West in Lake Saint Louis, MO
Also known as SSM Health Saint Joseph Hospital - Lake Saint Louis
In a medical emergency, call 911. This page is for information only.
About SSM St Joseph Hospital West
SSM St Joseph Hospital West is an acute care hospital in Lake Saint Louis, St. Charles County, Missouri. It reports its ownership to Medicare as nonprofit (church-affiliated). It provides emergency services. It is listed as a Level III trauma center. Its CMS Overall Hospital Quality Star Rating is 3 out of 5. It has 215 licensed beds, according to state license data via HIFLD. It meets the CMS Birthing-Friendly designation criteria for maternity care. The nearest other listed hospital is SSM Health Saint Joseph Hospital, about 5.7 mi away.
Quality ratings
How this hospital compares with the national rate on each measure group:
Source: Centers for Medicare & Medicaid Services, Hospital General Information. How star ratings work.
Emergency room times
Lower times are better. Reporting period ending September 2025. Source: CMS Timely and Effective Care. What these numbers mean.
Infections and sepsis care
- MRSA bloodstream infectionsNo different · SIR 1.78
- Catheter-associated urinary tract infections (CAUTI)No different · SIR 0.00
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.07
- Central line bloodstream infections (CLABSI)No different · SIR 1.11
- Surgical site infections after abdominal hysterectomyNo different · SIR 0.00
- Surgical site infections after colon surgeryNo different · SIR 0.74
49% of patients with severe sepsis or septic shock received all the recommended early care steps (SEP-1). Higher is better.
SIR is the standardized infection ratio: below 1 means fewer infections than predicted for a hospital like this one. Period ending September 2025. Source: CMS Healthcare-Associated Infections and Timely and Effective Care.
What patients say
- Patient survey star rating
- Would definitely recommend63%
- Rated the hospital 9 or 1064%
- Completed surveys676
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
38.80325, -90.77746
Nearby hospitals
- SSM Health Saint Joseph Hospital500 Medical Drive, Wentzville, MO · Emergency roomHospital5.7 mi
- Progress West Hospital2 Progress Point Pkwy, O'Fallon, MO · Level II traumaAcute care hospital7.5 mi
- Centerpointe Hospital4801 Weldon Spring Parkway, Saint Charles, MOPsychiatric hospital8.3 mi
- Barnes-Jewish St Peters Hospital10 Hospital Dr, Saint Peters, MO · Level I traumaAcute care hospital11 mi
- Select Specialty Hospital-St Louis300 First Capitol Drive, Saint Charles, MOLong-term care hospital16 mi
- SSM St Joseph Health Center300 1st Capitol Dr, Saint Charles, MO · Level II traumaAcute care hospital16 mi
- St Luke's Rehabilitation Hospital14709 Olive Boulevard, Chesterfield, MORehabilitation hospital16 mi
- Mercy Hospital Lincoln1000 East Cherry Street, Troy, MO · Emergency roomCritical access hospital17 mi
- Mercy Rehabilitation Hospital St Louis14561 North Outer Forty, Chesterfield, MORehabilitation hospital17 mi
- St Lukes Hospital232 S Woods Mill Rd, Chesterfield, MO · Level II traumaAcute care hospital18 mi
Frequently asked questions
Where is SSM St Joseph Hospital West located?
SSM St Joseph Hospital West is at 100 Medical Plaza, Lake Saint Louis, MO 63367 in St. Charles County.
Does SSM St Joseph Hospital West have an emergency room?
Yes. SSM St Joseph Hospital West reports emergency services to Medicare, and patients spent a median of 215 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of SSM St Joseph Hospital West?
SSM St Joseph Hospital West has a CMS Overall Hospital Quality Star Rating of 3 out of 5. The rating combines measures of mortality, safety of care, readmission, patient experience and timely and effective care, compared with hospitals nationwide.
Is SSM St Joseph Hospital West a trauma center?
Yes. It is listed as a Level III trauma center in the HIFLD hospitals data, which is compiled from state trauma registries (source date April 2024). Trauma designations are renewed periodically, so confirm with the Missouri EMS or trauma program. In an emergency, call 911: paramedics take seriously injured patients to the right trauma center.
What is the phone number of SSM St Joseph Hospital West?
The main phone number on record with Medicare is (636) 625-5200.
Would patients recommend SSM St Joseph Hospital West?
In the most recent HCAHPS patient survey (676 completed surveys), 63% of patients said they would definitely recommend the hospital, and 64% rated it 9 or 10 out of 10.
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