Mercy Hospital South in Saint Louis, MO
Also known as Mercy South
In a medical emergency, call 911. This page is for information only.
About Mercy Hospital South
Mercy Hospital South 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. Its CMS Overall Hospital Quality Star Rating is 2 out of 5. It meets the CMS Birthing-Friendly designation criteria for maternity care. Kindred Hospital St Louis South 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 infectionsBetter than national · SIR 0.38
- Catheter-associated urinary tract infections (CAUTI)Better than national · SIR 0.20
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.18
- Central line bloodstream infections (CLABSI)Better than national · SIR 0.19
- Surgical site infections after abdominal hysterectomyNo different · SIR 1.66
- Surgical site infections after colon surgeryNo different · SIR 1.46
61% 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 recommend65%
- Rated the hospital 9 or 1064%
- Completed surveys1,542
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
38.51050, -90.37862
Nearby hospitals
- Kindred Hospital St Louis South10018 Kennerly Rd, 3rd Flr Hyland Bldg B, Saint Louis, MOLong-term care hospitalSame campus
- Mercy Rehabilitation Hospital South10114 Kennerly Road, Saint Louis, MORehabilitation hospital0.2 mi
- SSM St Clare Health Center1015 Bowles, Fenton, MO · Level I traumaAcute care hospital5.2 mi
- St Louis Forensic Treatment Center5400 Arsenal St, Saint Louis, MOPsychiatric hospital8.5 mi
- SSM Health Rehabilitation Hospital1027 Bellevue Avenue, Richmond Heights, MORehabilitation hospital9.2 mi
- Missouri Baptist Medical Center3015 N Ballas Rd, Saint Louis, MO · Level II traumaAcute care hospital9.3 mi
- SSM Health St Mary's Hospital - St Louis6420 Clayton Rd, Saint Louis, MO · Level II traumaAcute care hospital9.3 mi
- Mercy Hospital St Louis615 New Ballas Road, Saint Louis, MO · Level I traumaAcute care hospital10.0 mi
- St Louis Childrens HospitalOne Childrens Place, Saint Louis, MO · Emergency roomChildren's hospital11 mi
- Barnes Jewish HospitalOne Barnes-Jewish Hospital Plaza, Saint Louis, MO · Level I traumaAcute care hospital11 mi
Frequently asked questions
Where is Mercy Hospital South located?
Mercy Hospital South is at 10010 Kennerly Road, Saint Louis, MO 63128 in St. Louis County.
Does Mercy Hospital South have an emergency room?
Yes. Mercy Hospital South reports emergency services to Medicare, and patients spent a median of 254 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of Mercy Hospital South?
Mercy Hospital South has a CMS Overall Hospital Quality Star Rating of 2 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 Mercy Hospital South a trauma center?
We have no trauma center designation on record for Mercy Hospital South. Hospitals without one still treat injuries in their emergency department and transfer patients who need a trauma center. Check the Missouri trauma program for the current list.
What is the phone number of Mercy Hospital South?
The main phone number on record with Medicare is (314) 525-1000.
Would patients recommend Mercy Hospital South?
In the most recent HCAHPS patient survey (1,542 completed surveys), 65% of patients said they would definitely recommend the hospital, and 64% rated it 9 or 10 out of 10.
Related guides
- ER Wait Times ExplainedHow triage and the Emergency Severity Index decide who is seen first, why emergency rooms get crowded and where to find timing data.
- What Is a Trauma Center? Levels I to V ExplainedWhat each trauma center level provides, who designates and verifies them, pediatric trauma centers and how trauma systems route patients.
- What Is a Teaching Hospital?How residency training works, who is on the care team, the benefits and trade-offs for patients, and your rights at an academic medical center.
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