WELL Health Medical Centres - Thornhill - Steeles Ave W (Main Exchange)

Walk-in clinic · Thornhill, ON · Hours not posted, call ahead

Hours: Mon to Fri 9 AM to 9 PM; Sat 9 AM to 5 PM; Sun 9 AM to 4 PM. Walk-ins via online queue. Phone (905) 738-6699.

All walk-in clinics in Thornhill, open now first →

Walk-ins accepted Virtual visits
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In an emergency, call 911. Independent service, not affiliated with this clinic. Free nurse advice: 811.

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Heads up: The clinic was formerly known as MCI - Main Exchange before being rebranded under the WELL Health network.

Hours

Monday9 AM to 9 PM
Tuesday9 AM to 9 PM
Wednesday9 AM to 9 PM
Thursday9 AM to 9 PM
Friday9 AM to 9 PM
Saturday9 AM to 5 PM
Sunday9 AM to 4 PM

Directory info from healthline_on, verified 2026-07-24. Details may have changed, call ahead to confirm.

Getting seen

Walk-ins via online queue. Clinic wording: “New Patient Reserve & Walk-In”

Accepting new patients.

Services

Walk-in visitsChildren seenMental healthAllied healthChronic disease follow-up

Also offers virtual visits.

Contact & Directions

800 Steeles Ave W, Suite 4A, Thornhill, ON L4J 7L2

Call (905) 738-6699 Fax 905-738-6073 Get directions Website

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Other walk-in clinics in Thornhill

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7117 Bathurst St, Suite 204 · Thornhill

Closed · opens Friday 10 AM

Family practice that also operates as a walk-in clinic, seeing patients on a first-come basis until a daily capacity limit is reached each day.

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Enhanced Care Medical Clinic - Thornhill

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Hours not posted, call ahead

This Thornhill location is part of the Enhanced Care Medical chain, operating as a combined walk-in and family practice clinic.

Walk-ins accepted

Health Nexus Clinic - Health Centre

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Call to confirm

Matlis Medical - Urgent Medical Walk-in Clinic

8200 Bayview Ave · Thornhill

Closed · opens Friday 9:30 AM

Physician-staffed walk-in clinic in Thornhill offering same-day, no-appointment urgent care seven days a week, with weekday hours in the morning through early evening and shorter weekend hours.

Walk-ins accepted

SunMed Walk-in Clinic and Family Practice

300 Steeles Ave W, Suite 10 · Thornhill

Hours not posted, call ahead

Call to confirm

See every walk-in clinic in Thornhill →

Emergency? Compare ER wait times in Thornhill, or call 911.

Directory info from healthline_on, verified 2026-07-24. Details may have changed, call ahead to confirm. Hours, walk-in policy and services were read from the clinic’s own website where one exists; if something here is out of date, the clinic’s site and phone line are the source of truth. Report an issue with this listing.