Trinity Health Ann Arbor Hospital in Ann Arbor, MI
Also known as Saint Joseph Mercy Ann Arbor
In a medical emergency, call 911. This page is for information only.
About Trinity Health Ann Arbor Hospital
Trinity Health Ann Arbor Hospital is an acute care hospital in Ann Arbor, Washtenaw County, Michigan. It reports its ownership to Medicare as nonprofit (church-affiliated). It provides emergency services. Its CMS Overall Hospital Quality Star Rating is 4 out of 5. CMS also lists an inpatient rehabilitation unit inside the hospital. It meets the CMS Birthing-Friendly designation criteria for maternity care. The nearest other listed hospital is Select Specialty Hospital-Ann Arbor, about 2.2 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 infectionsBetter than national · SIR 0.23
- Catheter-associated urinary tract infections (CAUTI)No different · SIR 1.02
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.47
- Central line bloodstream infections (CLABSI)No different · SIR 0.62
- Surgical site infections after abdominal hysterectomyNo different · SIR 1.12
- Surgical site infections after colon surgeryNo different · SIR 1.13
50% 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 recommend77%
- Rated the hospital 9 or 1071%
- Completed surveys593
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
42.25993, -83.65406
Nearby hospitals
- Select Specialty Hospital-Ann Arbor5301 E Huron River Dr, 7th Fl, Ypsilanti, MILong-term care hospital2.2 mi
- Forest Health Medical Center135 S Prospect St, Ypsilanti, MIAcute care hospital3.1 mi
- VA Ann Arbor Healthcare System2215 Fuller Road, Ann Arbor, MI · Emergency roomVA medical center3.6 mi
- University of Michigan Health System1500 E Medical Center Drive, Spc 5474, Ann Arbor, MI · Level I traumaAcute care hospital4.0 mi
- The Center for Forensic Psychiatry8303 Platt Road, Saline, MIPsychiatric hospital6.6 mi
- Beaumont Hospital, Wayne33155 Annapolis Street, Wayne, MI · Level III traumaHospital15 mi
- Corewell Health Wayne Hospital33155 Annapolis Ave, Wayne, MI · Emergency roomAcute care hospital15 mi
- Walter P Reuther Psychiatric Hospital30901 Palmer Rd, Westland, MIPsychiatric hospital16 mi
- St Joe Mercy Hospital System Livonia36475 Five Mile Road, Livonia, MI · Emergency roomAcute care hospital17 mi
- Providence Park Hospital47601 Grand River Avenue, Novi, MI · Level II traumaHospital17 mi
Frequently asked questions
Where is Trinity Health Ann Arbor Hospital located?
Trinity Health Ann Arbor Hospital is at 5301 E Huron River Dr, Ann Arbor, MI 48106 in Washtenaw County.
Does Trinity Health Ann Arbor Hospital have an emergency room?
Yes. Trinity Health Ann Arbor Hospital reports emergency services to Medicare, and patients spent a median of 241 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of Trinity Health Ann Arbor Hospital?
Trinity Health Ann Arbor Hospital 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 Trinity Health Ann Arbor Hospital a trauma center?
We have no trauma center designation on record for Trinity Health Ann Arbor Hospital. Hospitals without one still treat injuries in their emergency department and transfer patients who need a trauma center. Check the Michigan trauma program for the current list.
What is the phone number of Trinity Health Ann Arbor Hospital?
The main phone number on record with Medicare is (734) 712-3456.
Would patients recommend Trinity Health Ann Arbor Hospital?
In the most recent HCAHPS patient survey (593 completed surveys), 77% of patients said they would definitely recommend the hospital, and 71% rated it 9 or 10 out of 10.
Related guides
- Hospital Financial Assistance and Charity CareHow IRS 501(r) rules work, who usually qualifies for free or discounted care, and how to apply step by step.
- 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.