Walk-in clinic · St Catharines, ON · Closed · opens 9 AM today
Hours: Mon to Fri 9 AM to 6 PM; Sat 9 AM to 3 PM; Sun 10 AM to 3 PM. Walk-ins accepted (Last registration occurs 30 minutes before closing. Wait times vary with walk-in volume and physician availability; pre-booked family practice patients may be seen ahead of walk-ins). Phone (905) 937-0000.
Grantham Medical Clinic is a walk-in clinic and family practice in St. Catharines with an attached pharmacy. Walk-in patients are seen on weekdays from morning until early evening, with shorter hours on weekends, though the clinic stops registering new patients half an hour before closing and cannot guarantee everyone arriving before then will be seen. Besides same-day walk-in care for minor illness and injury, the clinic runs family doctor appointments, a pap smear clinic, travel health consultations, STI testing, and basic medical forms.
In an emergency, call 911. Independent service, not affiliated with this clinic. Free nurse advice: 811.
| Monday | 9 AM to 6 PM |
| Tuesday | 9 AM to 6 PM |
| Wednesday | 9 AM to 6 PM |
| Thursday | 9 AM to 6 PM |
| Friday | 9 AM to 6 PM |
| Saturday | 9 AM to 3 PM |
| Sunday | 10 AM to 3 PM |
Holiday hours are 11am-4pm. Last registration takes place 30 minutes before closing, and hours may change without notice based on physician availability and patient volume; arriving before closing does not guarantee you will be seen.
Hours from the clinic's own website, checked 2026-10-03.
Walk-ins accepted. Clinic wording: “We accept both walk-in and booked visits. Walk-ins are best for same-day concerns like minor illnesses or injuries.”
Last registration occurs 30 minutes before closing. Wait times vary with walk-in volume and physician availability; pre-booked family practice patients may be seen ahead of walk-ins.
Accepting new patients.
Pharmacy: Grantham Pharmacy.
Also offers virtual visits.
400 Scott St, St Catharines, ON L2M 3W4
Call (905) 937-0000 Fax 905-937-0030 Get directions Website
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Walk-in clinic in St.
Emergency? Compare ER wait times in St Catharines, 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 Hours, walk-in policy and services were read from the clinic’s own website where one exists; if something here is out of date, the clinic’s site and phone line are the source of truth.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.