SSM Health St Mary's Hospital - St Louis in Saint Louis, MO
In a medical emergency, call 911. This page is for information only.
About SSM Health St Mary's Hospital - St Louis
SSM Health St Mary's Hospital - St Louis is an acute care hospital in Saint Louis, St. Louis County, Missouri. It reports its ownership to Medicare as nonprofit (private). It provides emergency services. It is listed as a Level II trauma center. Its CMS Overall Hospital Quality Star Rating is 3 out of 5. It has 495 licensed beds, according to state license data via HIFLD. It meets the CMS Birthing-Friendly designation criteria for maternity care. SSM Health Rehabilitation Hospital is on the same campus or next door.
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 1.15
- Catheter-associated urinary tract infections (CAUTI)Better than national · SIR 0.18
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.30
- Central line bloodstream infections (CLABSI)Better than national · SIR 0.49
- Surgical site infections after abdominal hysterectomyNo different · SIR 0.42
- Surgical site infections after colon surgeryNo different · SIR 0.26
53% 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 1062%
- Completed surveys920
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
38.63387, -90.30977
Nearby hospitals
- SSM Health Rehabilitation Hospital1027 Bellevue Avenue, Richmond Heights, MORehabilitation hospitalSame campus
- St Louis Childrens HospitalOne Childrens Place, Saint Louis, MO · Emergency roomChildren's hospital2.4 mi
- Barnes Jewish HospitalOne Barnes-Jewish Hospital Plaza, Saint Louis, MO · Level I traumaAcute care hospital2.5 mi
- St Louis Forensic Treatment Center5400 Arsenal St, Saint Louis, MOPsychiatric hospital2.5 mi
- The Rehabilitation Institute of St. Louis, An Affi4455 Duncan Ave, Saint Louis, MORehabilitation hospital2.8 mi
- Shriners Hospitals for Children4400 Clayton Ave, Saint Louis, MOChildren's hospital2.9 mi
- Hawthorne Children's Psychiatric Hospital1901 Pennsylvania Avenue, Saint Louis, MOChildren's hospital3.6 mi
- SSM Health Cardinal Glennon Children’s Hospital1465 South Grand Boulelvard, Saint Louis, MO · Emergency roomHospital3.9 mi
- SSM Health Saint Louis University Hospital1201 S Grand Blvd, Saint Louis, MO · Level I traumaAcute care hospital4.0 mi
- St Louis-John Cochran VA Medical Center915 North Grand, St. Louis, MO · Emergency roomVA medical center4.3 mi
Frequently asked questions
Where is SSM Health St Mary's Hospital - St Louis located?
SSM Health St Mary's Hospital - St Louis is at 6420 Clayton Rd, Saint Louis, MO 63117 in St. Louis County.
Does SSM Health St Mary's Hospital - St Louis have an emergency room?
Yes. SSM Health St Mary's Hospital - St Louis reports emergency services to Medicare, and patients spent a median of 166 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of SSM Health St Mary's Hospital - St Louis?
SSM Health St Mary's Hospital - St Louis 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 Health St Mary's Hospital - St Louis a trauma center?
Yes. It is listed as a Level II 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 Health St Mary's Hospital - St Louis?
The main phone number on record with Medicare is (314) 768-8000.
Would patients recommend SSM Health St Mary's Hospital - St Louis?
In the most recent HCAHPS patient survey (920 completed surveys), 63% of patients said they would definitely recommend the hospital, and 62% rated it 9 or 10 out of 10.
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