Live Updated 18 min ago
7min
current ed wait
39 min shorter than usual
57 min
avg today
46 min
avg overall
226 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: CoxHealth · 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, 1 AM
avg. of 1 reading
7 min steady
Today, 12 AM
avg. of 2 readings
6 min steady
Yesterday, 11 PM
avg. of 2 readings
6 min steady
Yesterday, 10 PM
avg. of 2 readings
6 min steady
Yesterday, 9 PM
avg. of 2 readings
7 min steady
Yesterday, 8 PM
avg. of 2 readings
8 min falling
Yesterday, 7 PM
avg. of 2 readings
12 min falling
Yesterday, 6 PM
avg. of 2 readings
14 min falling
Yesterday, 5 PM
avg. of 2 readings
16 min falling
Yesterday, 4 PM
avg. of 2 readings
23 min falling
Yesterday, 3 PM
avg. of 2 readings
27 min falling
Yesterday, 2 PM
avg. of 2 readings
34 min steady
Yesterday, 1 PM
avg. of 2 readings
36 min falling
Yesterday, 12 PM
avg. of 2 readings
46 min falling
Yesterday, 11 AM
avg. of 2 readings
1 hr falling
Yesterday, 10 AM
avg. of 2 readings
1 hr 16 min falling
Yesterday, 9 AM
avg. of 2 readings
1 hr 24 min falling
Yesterday, 8 AM
avg. of 2 readings
2 hr 4 min falling
Yesterday, 7 AM
avg. of 2 readings
3 hr 18 min steady
Yesterday, 6 AM
avg. of 2 readings
3 hr 17 min falling
Yesterday, 5 AM
avg. of 2 readings
3 hr 20 min rising
Yesterday, 4 AM
avg. of 2 readings
2 hr 28 min rising
Yesterday, 3 AM
avg. of 2 readings
26 min rising
Yesterday, 2 AM
avg. of 2 readings
14 min -
Visit St. Louis County
Address
10010 KENNERLY ROAD
Saint Louis, MO 63128
Phone
Voluntary non-profit - Private
HoursOpen 24/7 Websitemercy.net
Facilities & services
767
total beds
26
operating rooms
General acute care
facility type
Emergency & critical care
Dedicated ERShock / traumaICUCCUEmergency psych
Imaging
CTMRIDiagnostic radiology
Surgery
Inpatient surgeryOpen heart surgeryCath lab
Other services
ChemotherapyRenal dialysisPsychiatric unitInpatient rehabPharmacy
Accessibility & amenities
Wheelchair-accessible entrance Wheelchair-accessible parking Wheelchair-accessible restroom Wheelchair-accessible seating Free parking lot Paid parking lot Apple Pay / Google Pay
ER performance
Typical ER visit length
Median time from arrival to leaving.
4 hr 1 min of 403 patients
Mental-health ER visit length
Mental health visits usually run longer (safety screening).
6 hr 27 min of 37 patients
Patients who left before being seen
Walked out before being seen, usually due to long waits.
2% of 71,451 visits
Head CT scan time for stroke
Time from arrival to head CT for suspected stroke. Faster is better.
1 hr 33 min of 15 patients
Compared to other US hospitals
Patient safety
Rates of infections, clots, falls and surgical complications during a stay.
Above average
Avoiding readmission
Patients returning within 30 days for the same condition.
- About average
Infection rates lower is better
Central-line bloodstream infections
Bloodstream infections from a central IV line. Known as CLABSI.
- About average
0.55 1.00 = national avg
Catheter urinary-tract infections
UTIs from a urinary catheter. Known as CAUTI.
- About average
0.75 1.00 = national avg
Colon surgery site infections
Wound infections after colon surgery.
- About average
1.92 1.00 = national avg
Hysterectomy site infections
Wound infections after abdominal hysterectomy.
- About average
2.79 1.00 = national avg
MRSA bloodstream infections
Drug-resistant staph in the bloodstream.
- About average
0.66 1.00 = national avg
C. diff (intestinal) infections
Gut infections, often after antibiotics.
Better than average
0.22 1.00 = national avg
What patients say
Overall HCAHPS rating
Hospital rating
64% rated 9 or 10 of 10
64%
Would recommend
60% would definitely recommend
60%
Nurse communication
69% said nurses always communicated well
69%
Doctor communication
70% said doctors always communicated well
70%
Cleanliness
57% said the room was always clean
57%
Quietness at night
52% said the area was always quiet at night
52%
Clinicians on staff
1,038
total clinicians
23
ER physicians
By specialty
Internal medicine 183
Radiology 64
Obstetrics / gynecology 37
Orthopedic surgery 28
Cardiology 27
General surgery 26
Anesthesiology 24
Neurology 14
Hematology / oncology 14
Pulmonology 9
Critical care 7
Interventional cardiology 5
Interventional radiology 4
Where this number comes from

CoxHealth publishes this wait time on its website, mychart.coxhealth.com . 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: 1:23am on 11 Jun 2026 (hospital local time)
Frequently asked questions
How long is the wait at Mercy Hospital South?

The most recently published wait at Mercy Hospital South is 7 minutes, as of 1:23am hospital local time. The all-time average for this ER is around 46 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 Saint Louis.

Is Mercy Hospital South 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 Mercy Hospital South, call (314) 525-1000.

Where is Mercy Hospital South located?

Mercy Hospital South is located at 10010 Kennerly Road, Saint Louis, MO, 63128. Phone: (314) 525-1000.