Diagnostic Clinics in London, Ontario
ClinicFinder lists 5 diagnostic clinics in London. Of these, 3 offer same-day appointments. Top rated, weighing the rating against the number of reviews: Alpha Labs - London - Gainsborough Road (3.8/5 from 28 Google reviews).
Alpha Labs - London - Gainsborough Road
990 Gainsborough Road, Hyde Park
Same-day appointments
Alpha Labs - London - Oxford Street
140 Oxford Street East, North London
Same-day appointments
Latest listing check October 2026
About diagnostic clinics in London
ClinicFinder lists 5 diagnostic clinics in London. The average patient rating is 3.8 out of 5, and 1 clinic is rated 4.5 or higher.
Call ahead if you are unsure about hours, and ask about fees and insurance before your visit.
Other care in London
Clinics and practitioners listed in the city, by type of care.
Diagnostic Clinics nearby
Neighbourhoods and cities around London.
Questions about diagnostic clinics in London
Answers from the listings above and Ontario's health plan.
How do I know if a diagnostic clinic in London is accepting new patients?
Call ahead and ask whether they are taking new patients. The listings above show each clinic's phone number and today's hours, so you can check before making the trip.
Which diagnostic clinic in London has the highest rating?
Among diagnostic clinics in London with at least 10 Google reviews, Alpha Labs - London - Gainsborough Road has the highest rating: 3.8/5 from 28 Google reviews.
Are there diagnostic clinics open on weekends in London?
None of the 5 listings above that publish their hours are open on weekends. Call ahead, since hours can change.
Is diagnostic testing covered by health insurance in Ontario?
OHIP covers medically necessary physician services at walk-in clinics. Children 17 and under and low-income seniors 65+ may qualify for dental care through provincial programs. Physiotherapy is covered for patients under 20, over 65, or within 12 months of hospital discharge. Full details are on the OHIP page.
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