Catchment laboratories are based on the referring institution’s location. The catchment areas assigned to each GSO laboratory can be found below.

If you cannot find your institution’s designated catchment laboratory or have questions about where to send your patient’s specimen to, please contact or 613-737-7600 ext. 3796.

SickKids CHEO
SickKids Genome Diagnostics Laboratory
555 University Avenue
Room 3416, Roy C. Hill Wing
Toronto, ON, M5G 1X8
Phone: (416) 813-7200 ext. 1
Fax: (416) 813-7732

For laboratory inquiries, contact:

CHEO Genetics Diagnostic Laboratory
401 Smyth Road
Rm w3403
Ottawa, ON, K1H 8L1
Phone: 613-737-7600 ext. 3796
Fax: 613-738-4814

For laboratory inquiries, contact:

GSO Catchment Areas

A map of Ontario depicting the GSO catchment areas. Genetics sites located in the Kitchener-Waterloo, Hamilton, Peel, Toronto, or York region should send their patient specimens to SickKids. Genetics sites located in Durham, Kingston, London, Ottawa, Peterborough, Windsor, or in Northern Ontario should send their patient specimens to CHEO

Documents and images found on the GSO website can be requested in alternative forms such as plain language or accessible electronic format as part of our commitment to Accessibility. To request information in an alternative format please email or call 613-737-7600 ext. 3796

Find your GSO laboratory by institution name: