Keele Medical Ontario Referral Source

Dr. George Nicholas Mastoras

Find Ontario specialists, clinics and hospital programs. Compare estimated wait times, contact details and referral requirements in Keele Medical’s public directory.

Dr. George Nicholas Mastoras

Specialty: Emergency Medicine

Location: UHN Toronto General Hospital, R Fraser Elliott Building, Ground Floor Room 480, 200 Elizabeth Street, Toronto ON, M5G 2C4

Physicians: Dr. George Nicholas Mastoras

Estimated wait time: Not published

Phone: 416-340-3856

Languages: English

Last verified: 2026-09-25

Wait times are estimates from the latest directory update. Contact the clinic to confirm current availability and referral requirements.

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Keele MedicalClinic & Pharmacy · North York

Keele Walk-in Clinic & Pharmacy

Schedule your appointment in person at the clinic, or book a virtual visit on most days of the week. For in-person visits, please call before coming in.

What we treat

Care for your whole family, in one place

Walk in, book ahead, or be seen virtually on most days of the week. Every request below reaches our team directly.

ADHD Assessment & Treatment

Assessment, diagnosis and ongoing management for adults and youth.

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Weight Loss

A medically supervised plan built around your health history, not a one-size-fits-all program.

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Insomnia & Sleep Problems

Get to the cause of poor sleep and treat it, rather than managing it indefinitely.

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Methadone & Suboxone Treatment

Road to Recovery addiction care in Toronto: opioid agonist therapy including Methadone, Suboxone® and Kadian® programs.

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Erectile Dysfunction (ED) Treatment

Clinically proven treatments, as needed or daily, prescribed after a proper assessment.

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Opening hours

When you can come in

These are pharmacy hours. Clinic hours vary — please call before coming in person.

Phone(647) 243-4620
Fax(647) 689-6521
Address3472 Keele St. North York, ON, M3J 3M1

Monday10:00 AM – 2:00 PM

Tuesday10:00 AM – 2:00 PM

WednesdayClosed

ThursdayClosed

Friday10:00 AM – 2:00 PM

Saturday10:00 AM – 2:00 PM

Sunday10:00 AM – 2:00 PM

Clinic hours differ from the pharmacy hours shown here. Please call (647) 243-4620 before coming in for an in-person visit.

From our patients

What people say about us

Keele Medical Clinic has been a lifesaver for me. Their professional staff and comprehensive services make every visit pleasant. I appreciate their dedication to patient care and the convenience of having medical and pharmacy services in one place.

Jordan Lee

I am so grateful for Keele Medical Clinic. Their attentive care and efficient service have truly enhanced my healthcare experience. The convenience of accessing both clinic and pharmacy under one roof is unparalleled.

Alex Morgan

Keele Medical Clinic/Pharmacy consistently provides exceptional healthcare services. The staff are always professional and caring. Having the clinic and pharmacy together saves time and adds convenience to managing my health needs.

Taylor Smith

Find us

3472 Keele St., North York

Clinic and pharmacy share one entrance, so a prescription written at your visit can be filled before you leave.

Phone(647) 243-4620
Fax(647) 689-6521
ParkingOn-site, at the front of the building.

3472 Keele St.
North York, ON M3J 3M1

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