How to request genetic testing in Ontario

This page shows physicians how to request a genomic SNP microarray test, which is the recommended test to assess for 22q11.2 deletion syndrome.

To find out more about the technical aspects of genomic SNP microarray and other tests, please visit our page on How is genetic testing for 22q11.2 deletions done.

See also:
Legal Protection For Individuals Who Have Medical Genetic Testing

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What the physician needs to do

Complete the following two forms:

Note: It is possible to request genetic tests for 22q at additional testing centres in Ontario. Please contact the testing centres for information.

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What the patient needs to do

Bring the two completed forms (see above) to a lab operated by Dynacare or Lifelabs to have his/her blood drawn on a Monday, Tuesday, or Wednesday.

The lab will deliver the blood sample to the Hospital for Sick Children for testing.

By taking the blood sample on a Monday, Tuesday, or Wednesday, the blood sample can arrive at the Hospital for Sick Children on a weekday for processing.


Our instruction for patients to get their blood drawn at Dynacare or Lifelabs does not constitute an endorsement for these two companies. Their names are listed here simply because they will ship blood samples to the Hospital for Sick Children for testing.

Patients who wish to get their blood drawn by a different laboratory should discuss the issue of shipping with that laboratory before starting the procedure.

If you have any questions, please call our Clinic at (416) 340-5145 or email us at

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