Did you know that “up to 85% of clinical decisions are based upon the information derived from laboratory testing?” Froubister, 2000

St. Mary’s General Hospital laboratory services ensure the accuracy and timely turnaround of all lab tests from the St. Mary’s lab and from our reference labs including Grand River Hospital. Our laboratory performs approximately 1.7 million lab tests a year and operates 24/7.

Please note that we only provide testing for registered inpatients and existing registered outpatients of hospital programs. Non-registered outpatients testing takes place in the community. Please contact your doctor’s office for the locations of these blood and specimen collection centres.

For registered hospital patients, lab specimen procurement or phlebotomy (blood sample collection) comes to you in whatever part of the hospital you are receiving care.

The laboratory itself, and the highly skilled Medical Laboratory Technologists, phlebotomy and administration staff, are located on the 9th floor.

We encourage you to review these pages:

Do you have questions and want to know more?


Dr. Dimitrios Divaris, Joint Medical Director and Chief of Laboratory Medicine
St. Mary’s General Hospital: 519-749-6793
Grand River Hospital: 519-749-4300 ext. 2323

Laboratory Clerical Support at St. Mary’s

Rosena Capistrano
519-749-6578 ext. 6935

Lab Reception
519-749-6578 ext. 6501