Mercy Health System Corp in Janesville, WI
In a medical emergency, call 911. This page is for information only.
About Mercy Health System Corp
Mercy Health System Corp is an acute care hospital in Janesville, Rock County, Wisconsin. 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 240 licensed beds, according to state license data via HIFLD. It meets the CMS Birthing-Friendly designation criteria for maternity care. Mercy Health Hospital & Trauma Center 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 0.58
- Catheter-associated urinary tract infections (CAUTI)No different · SIR 0.22
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.21
- Central line bloodstream infections (CLABSI)Better than national · SIR 0.17
- Surgical site infections after colon surgeryNo different · SIR 0.54
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 recommend63%
- Rated the hospital 9 or 1066%
- Completed surveys346
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
42.68679, -89.03285
Nearby hospitals
- Mercy Health Hospital & Trauma Center1000 Mineral Point Avenue, Janesville, WI · Emergency roomHospitalSame campus
- SSM Health St Mary's Hospital - Janesville3400 East Racine Street, Janesville, WI · Level III traumaAcute care hospital3.0 mi
- Mercy Hospital & Trauma Center North3400 Deerfield Drive, Janesville, WIHospital3.4 mi
- Beloit Health System1969 W Hart Rd, Beloit, WI · Level III traumaAcute care hospital9.7 mi
- Edgerton Hospital and Health Services11101 N Sherman Road, Edgerton, WI · Level IV traumaCritical access hospital10 mi
- Stoughton Hospital900 Ridge St, Stoughton, WI · Level IV traumaCritical access hospital19 mi
- Fort Memorial Hospital611 Sherman Ave E, Fort Atkinson, WI · Emergency roomAcute care hospital20 mi
Frequently asked questions
Where is Mercy Health System Corp located?
Mercy Health System Corp is at 1000 Mineral Point Ave, Janesville, WI 53547 in Rock County.
Does Mercy Health System Corp have an emergency room?
Yes. Mercy Health System Corp reports emergency services to Medicare, and patients spent a median of 161 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of Mercy Health System Corp?
Mercy Health System Corp 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 Mercy Health System Corp 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 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 Mercy Health System Corp?
The main phone number on record with Medicare is (608) 756-6161.
Would patients recommend Mercy Health System Corp?
In the most recent HCAHPS patient survey (346 completed surveys), 63% of patients said they would definitely recommend the hospital, and 66% 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.
- How to Read a Hospital BillItemized bills, EOBs and billing codes explained, plus No Surprises Act protections and a step-by-step way to check for errors.