Live Updated 20 min ago
29min
current ed wait
7 min shorter than usual
36 min
avg today
36 min
avg overall
201 min
longest seen
Typical wait for non-urgent cases. Patients are seen in order of clinical priority. The most seriously ill are always seen first, no matter how busy the ER is.
Refreshing in 5:00
Source: Trinity Health · auto-refreshed every 30 min · details
Life-threatening symptoms? Call 911. Don't rely on this site to make that decision.
Wait time, last 24 hours
Under 30 min 30 - 60 min Over 60 min Typical next few hours
Typical wait by hour of the day

Average wait at each hour, across every reading we have.

Hour-by-hour breakdown
HourAvg. waitTrend
Today, 2 AM
avg. of 1 reading
29 min falling
Today, 1 AM
avg. of 2 readings
50 min rising
Today, 12 AM
avg. of 2 readings
46 min rising
Yesterday, 11 PM
avg. of 2 readings
36 min rising
Yesterday, 10 PM
avg. of 2 readings
28 min steady
Yesterday, 9 PM
avg. of 2 readings
26 min steady
Yesterday, 8 PM
avg. of 2 readings
27 min rising
Yesterday, 7 PM
avg. of 2 readings
17 min steady
Yesterday, 6 PM
avg. of 2 readings
18 min falling
Yesterday, 5 PM
avg. of 2 readings
36 min rising
Yesterday, 4 PM
avg. of 2 readings
30 min falling
Yesterday, 3 PM
avg. of 2 readings
54 min rising
Yesterday, 2 PM
avg. of 2 readings
42 min rising
Yesterday, 1 PM
avg. of 2 readings
18 min falling
Yesterday, 12 PM
avg. of 2 readings
28 min rising
Yesterday, 11 AM
avg. of 2 readings
20 min rising
Yesterday, 10 AM
avg. of 2 readings
18 min rising
Yesterday, 9 AM
avg. of 2 readings
12 min falling
Yesterday, 8 AM
avg. of 2 readings
34 min falling
Yesterday, 7 AM
avg. of 2 readings
42 min falling
Yesterday, 6 AM
avg. of 2 readings
1 hr 6 min rising
Yesterday, 5 AM
avg. of 2 readings
57 min falling
Yesterday, 4 AM
avg. of 2 readings
1 hr 30 min rising
Yesterday, 3 AM
avg. of 2 readings
32 min -
Visit Washtenaw County
Address
5301 E HURON RIVER DR
Ann Arbor, MI 48106
Phone
Voluntary non-profit - Church
HoursOpen 24/7 Websitetrinityhealthmichigan.org
Facilities & services
505
total beds
General acute care
facility type
Emergency & critical care
Dedicated ERICUCCU
Imaging
Diagnostic radiology
Surgery
Inpatient surgeryOpen heart surgeryAnesthesiology
Other services
Renal dialysisPsychiatric unitInpatient rehabAlcohol & drugPharmacy
Accessibility & amenities
Hearing loop Wheelchair-accessible parking Wheelchair-accessible restroom Paid parking lot Apple Pay / Google Pay
ER performance
Typical ER visit length
Median time from arrival to leaving.
3 hr 46 min of 371 patients
Mental-health ER visit length
Mental health visits usually run longer (safety screening).
3 hr 45 min of 21 patients
Patients who left before being seen
Walked out before being seen, usually due to long waits.
2% of 85,525 visits
Compared to other US hospitals
Patient safety
Rates of infections, clots, falls and surgical complications during a stay.
- About average
Avoiding readmission
Patients returning within 30 days for the same condition.
Below average
Infection rates lower is better
Central-line bloodstream infections
Bloodstream infections from a central IV line. Known as CLABSI.
- About average
0.82 1.00 = national avg
Catheter urinary-tract infections
UTIs from a urinary catheter. Known as CAUTI.
- About average
0.92 1.00 = national avg
Colon surgery site infections
Wound infections after colon surgery.
- About average
1.25 1.00 = national avg
Hysterectomy site infections
Wound infections after abdominal hysterectomy.
Worse than average
3.17 1.00 = national avg
MRSA bloodstream infections
Drug-resistant staph in the bloodstream.
- About average
0.46 1.00 = national avg
C. diff (intestinal) infections
Gut infections, often after antibiotics.
Better than average
0.45 1.00 = national avg
What patients say
Overall HCAHPS rating
Hospital rating
74% rated 9 or 10 of 10
74%
Would recommend
78% would definitely recommend
78%
Nurse communication
80% said nurses always communicated well
80%
Doctor communication
79% said doctors always communicated well
79%
Cleanliness
57% said the room was always clean
57%
Quietness at night
53% said the area was always quiet at night
53%
Clinicians on staff
1,482
total clinicians
51
ER physicians
By specialty
Internal medicine 230
Obstetrics / gynecology 58
Radiology 54
Anesthesiology 40
Orthopedic surgery 26
Neurology 20
General surgery 16
Cardiology 14
Pulmonology 10
Hematology / oncology 10
Interventional cardiology 8
Interventional radiology 8
Critical care 6
Where this number comes from

Trinity Health publishes this wait time on its website, mychart.trinity-health.org . We check it about every 30 minutes and show you the most recent number.

  • What it means: How long someone arriving right now would likely wait to see a doctor.
  • Last updated: 2:22am on 11 Jun 2026 (hospital local time)
Frequently asked questions
How long is the wait at Trinity Health Ann Arbor Hospital?

The most recently published wait at Trinity Health Ann Arbor Hospital is 29 minutes, as of 2:22am hospital local time. The all-time average for this ER is around 36 minutes. Wait times change quickly , call the ER to confirm before you travel.

Should I go to the ER or to urgent care?

For life-threatening symptoms , chest pain, stroke signs (face drooping, arm weakness, speech difficulty), severe bleeding, breathing difficulty, or loss of consciousness , call 911 and head to the ER. For minor injuries, fevers, low-grade illness, or anything non-emergency, urgent care is usually faster and cheaper. See urgent care near Ann Arbor.

Is Trinity Health Ann Arbor Hospital open 24 hours?

Most Medicare-certified ERs in the US run 24 hours a day, seven days a week. To confirm the current status of Trinity Health Ann Arbor Hospital, call (734) 712-3456.

Where is Trinity Health Ann Arbor Hospital located?

Trinity Health Ann Arbor Hospital is located at 5301 E Huron River Dr, Ann Arbor, MI, 48106. Phone: (734) 712-3456.