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Southlake’s COVID-19 Assessment Centre

Southlake’s COVID-19 Assessment Centre location
22 Prospect Street
Newmarket, Ontario

Assessment Centre Hours
8 a.m. – 8 p.m.
7 days a week

Book an appointment online for a COVID-19 test

Note: Appointments are only scheduled at most three days in advance. The cut-off to book online is 4 hours before the scheduled appointment. In some situations, we are required to call a patient back for additional information.

If you are having difficulties booking online please call 905-895-4521 ext 2162 between the hours of 9 a.m. and 5 p.m.

If there are no appointments available at this site please click here for a list of other locations where you can book your test. Please note that COVID-19 testing takes place at the Assessment Centre not the Emergency Department. 

Following the direction of the Provincial Government, all COVID-19 testing will be done by appointment only. Walk-in COVID tests are no longer available.

Please do not seek testing at multiple COVID-19 assessment centres as this will result in delayed access and delayed test results for all. If you have already booked an appointment at an assessment centre and can no longer make it, please cancel and rebook your time so others who need a test can be seen.

Please ensure you bring your Health Card, Driver’s License other other form of ID to your appointment.

The Assessment Centre does not do travel swabs. 


What to expect when getting tested

To help with physical distancing, please do not arrive too early. Aim to arrive only 5 to 10 minutes before your appointment. There is limited free parking on site at 22 Prospect Street, or you can park in the hospital’s garage across the street.

Please be sure to have your health card ready and two pieces of ID (your health card can be one of these) and arrive wearing a mask.


What happens at the Assessment Centre?

Patients who come to the Assessment Centre will be assessed on arrival, given a mask (if they are not already wearing one), and will be instructed to wait in a physically distanced line. Patients will be swabbed and the sample sent for processing. While awaiting results, patients will be given instructions on how to self-isolate at home.


Who are we testing?

As per Ontario Government guidelines for COVID-19 testing, Southlake’s Assessment Centre will only be testing patients who:

  • have symptoms of COVID-19
  • were alerted to a potential exposure by the COVID-19 app or by Public Health
  • were in contact with someone who has COVID-19
  • were involved in a COVID-19 outbreak
  • are in an at-risk group as defined by provincial health officials
  • require a test to visit a long-term care home/resident

Complete the Ontario Government’s self-assessment to determine if you require a COVID-19 test.

Our Assessment Centre will not be testing patients who do not meet the above criteria.

If you are unsure if you should get a COVID-19 test, you can use the Ontario Government’s self-assessment tool to help you determine if you should come to our Assessment Centre:


How can I be seen at the Assessment Centre
Please click here to make an appointment online to be tested at Southlake’s Assessment Centre. Once you have an appointment time, please come to Southlake’s Assessment Centre at 22 Prospect Street, Newmarket, ON. Please wear a mask, bring your health card with you and one other piece of ID. 


If I am tested at the Assessment Centre, how will I find out the results?
Public Health will ONLY contact you to inform you of a POSITIVE result and will provide any other necessary information. Please note that results can take up to five days, depending on the number of patients being tested. Hospital staff are not authorized to release test results over the phone/text. Please do not call the hospital to ask for your test results.

COVID-19 test results are available on the Province’s website as they are received, both positive and negative. Results may take up to five days.


If I am tested, how long will it take to get the results?
This will vary depending on the number of tests being performed. Patients who are symptomatic will be advised to remain at home in self-isolation pending the results of their test.

Know the difference: self-monitoring, self-isolation and isolation for COVID-19