Your pharmacist can assess and prescribe for 22+ common conditions including UTIs, cold sores, pink eye, allergies, menstrual pain, acne. No appointment needed.
The Emergency Department at Trillium Health Partners – Mississauga Hospital is one of the largest emergency departments in Canada, serving the central and southern neighbourhoods of Mississauga, ON with 24/7 acute care. Organized into six specialized zones — including resuscitation and trauma, acute psychiatric care, urgent care, and a dedicated pediatric area — this 751-bed regional hospital is equipped to handle everything from life-threatening emergencies to complex multi-system conditions. As a University of Toronto-affiliated teaching hospital and home to specialized regional programs in cardiac surgery, neurosurgery, stroke care, and vascular services, this is one of the most comprehensive acute care facilities in Ontario.
Services & Specialties
24/7 Emergency Department, Resuscitation and trauma care, Acute psychiatric emergency care, Pediatric emergency care, Urgent care, Minor treatment, Advanced cardiac surgery, Primary percutaneous coronary intervention (primary PCI), Cardiac wellness and rehabilitation, Neurosurgery, Stroke care, Vascular services, Geriatric mental health services, Specialized geriatric services, Mental health and addictions services, Maternal and child care, Pediatric oncology, Cancer services, Renal services, Neurosciences, Palliative care, Spine centre, Sexual assault and domestic violence services, Diagnostic imaging, Clinical genetics, Critical care, Fracture clinic, Family medicine, Outpatient and ambulatory care.
Amenities
Pharma Plus retail pharmacy in Main Lobby (Mon–Fri 8:30am–7pm, Sat–Sun 10am–4pm)
This is one of the largest EDs in Canada — if your condition is non-life-threatening, consider calling 811 (Health811) first to determine whether an ER visit is truly necessary.
A dedicated THP shuttle runs between Mississauga Hospital, Queensway Health Centre, and Credit Valley Hospital — useful if you need to transfer between THP sites.
Use the HPASS parking card if you or a family member will be visiting frequently; it provides a discounted rate and is transferable among caregivers and family members.
If you need an escorted walk to your car or a bus stop at any hour, THP's Safe Walk program is available 24/7 — ask at the security desk.
The Pharma Plus pharmacy in the Main Lobby can fill prescriptions before you leave, so bring your health card and any relevant prescription information to your visit.
What to Bring
Ontario health card (OHIP card)
Government-issued photo ID
List of current medications, dosages, and allergies
Any relevant medical records, referral letters, or imaging results
Provincial drug benefit card or private insurance information
Emergency contact name and phone number
Phone charger or portable battery pack for long waits
Comfortable clothing and a light jacket, as ER waiting areas can be cool
Frequently Asked Questions
Is the Trillium Health Partners Mississauga Hospital Emergency Department open 24/7?
Yes, the Emergency Department at Trillium Health Partners – Mississauga Hospital at 100 Queensway W, Mississauga is open 24 hours a day, 7 days a week, every day of the year, including holidays.
Does this ER have a dedicated pediatric emergency area?
Yes. The ED is organized into six distinct zones, one of which is a dedicated pediatric area. The hospital also hosts the Colonel Harland Sanders Family Care Centre, providing comprehensive women's and children's services — the first of its kind located within a Canadian hospital.
Can I be seen for a psychiatric emergency at this ER?
Yes. The Emergency Department includes a dedicated acute psychiatric care zone, and Trillium Health Partners operates a comprehensive mental health program that covers acute inpatient care, ambulatory services, child and adolescent services, medical psychiatry, and seniors' mental health — making it well-equipped to handle psychiatric emergencies.
What regional specialties are available at Mississauga Hospital that may not be at other local ERs?
Mississauga Hospital is home to several specialized regional programs, including advanced cardiac surgery, primary percutaneous coronary intervention (primary PCI for heart attacks), neurosurgery, stroke care, vascular services, geriatric mental health, and specialized geriatric services — services not typically found at community hospitals.
How much does parking cost at Trillium Mississauga Hospital?
Parking is $3.75 per half hour, with a daily maximum of $19.00 or a $25 day pass. Frequent visitors can save with an HPASS multi-day card, available for 5, 10, 30, or 100 days, purchasable at the on-site Parking Office. Electric vehicle charging is also available at $1.70/hour.
Is Trillium Health Partners – Mississauga Hospital a teaching hospital?
Yes. THP is affiliated with the University of Toronto Faculty of Medicine and is part of the Mississauga Academy of Medicine (MAM), one of four academies in U of T's MD program. It is also an associate member of the Toronto Academic Health Science Network.