SSM Health St Mary's Hospital - Janesville in Janesville, WI
In a medical emergency, call 911. This page is for information only.
About SSM Health St Mary's Hospital - Janesville
SSM Health St Mary's Hospital - Janesville is an acute care hospital in Janesville, Rock County, Wisconsin. It reports its ownership to Medicare as nonprofit (other). It provides emergency services. It is listed as a Level III trauma center. Its CMS Overall Hospital Quality Star Rating is 4 out of 5. It has 50 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 Mercy Health System Corp, about 3.0 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
- Clostridioides difficile (C. diff) infectionsNo different · SIR 0.66
52% 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 recommend76%
- Rated the hospital 9 or 1080%
- Completed surveys514
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
42.67093, -88.97738
Nearby hospitals
- Mercy Health System Corp1000 Mineral Point Ave, Janesville, WI · Level II traumaAcute care hospital3.0 mi
- Mercy Health Hospital & Trauma Center1000 Mineral Point Avenue, Janesville, WI · Emergency roomHospital3.1 mi
- Mercy Hospital & Trauma Center North3400 Deerfield Drive, Janesville, WIHospital3.5 mi
- Beloit Health System1969 W Hart Rd, Beloit, WI · Level III traumaAcute care hospital8.7 mi
- Edgerton Hospital and Health Services11101 N Sherman Road, Edgerton, WI · Level IV traumaCritical access hospital12 mi
- Fort Memorial Hospital611 Sherman Ave E, Fort Atkinson, WI · Emergency roomAcute care hospital19 mi
- Stoughton Hospital900 Ridge St, Stoughton, WI · Level IV traumaCritical access hospital21 mi
- Mercy Walworth Hospital & Medical CenterN2950 State Road 67, Lake Geneva, WI · Level III traumaCritical access hospital23 mi
- Aurora Lakeland Medical CenterW3985 County Road Nn, Elkhorn, WI · Level III traumaAcute care hospital24 mi
- MercyHealth - Riverside Medical Center8201 East Riverside Boulevard, Rockford, ILHospital25 mi
Frequently asked questions
Where is SSM Health St Mary's Hospital - Janesville located?
SSM Health St Mary's Hospital - Janesville is at 3400 East Racine Street, Janesville, WI 53546 in Rock County.
Does SSM Health St Mary's Hospital - Janesville have an emergency room?
Yes. SSM Health St Mary's Hospital - Janesville reports emergency services to Medicare, and patients spent a median of 138 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 - Janesville?
SSM Health St Mary's Hospital - Janesville has a CMS Overall Hospital Quality Star Rating of 4 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 - Janesville 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 Wisconsin 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 - Janesville?
The main phone number on record with Medicare is (608) 373-8000.
Would patients recommend SSM Health St Mary's Hospital - Janesville?
In the most recent HCAHPS patient survey (514 completed surveys), 76% of patients said they would definitely recommend the hospital, and 80% rated it 9 or 10 out of 10.
Related guides
- How CMS Hospital Star Ratings WorkThe five measure groups behind the 1 to 5 star Overall Hospital Quality Star Rating, how it is calculated and what it leaves out.
- How to Choose a Hospital to Give BirthLevels of maternal and newborn care, the CMS Birthing-Friendly designation, quality data and questions to ask on a tour.
- How to Choose a HospitalA practical checklist for planned care: insurance networks, procedure volume, quality ratings, certifications and cost estimates.
- 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.