Laboratory Services


St. Mary’s laboratory provides diagnostic testing for inpatients and outpatients. Functioning as a team to offer quality patient care, we work with physicians and other health care providers to promote healing. We are committed to treating you with dignity and respect.


Hours And Locations

Our Laboratory Services offer two locations on the St. Mary’s campus: 

Main Laboratory 
450 Stanyan Street, Level A 
San Francisco, CA 94117 
Weekdays: 7 a.m. – 6 p.m. 
Saturdays: 8 a.m. – 2 p.m.

Sister Diane Grassilli Center for Women’s Health
1 Shrader Street, Suite 490
San Francisco, CA 94117
Weekdays: 8 a.m. – 3:30 p.m.

Learn More About Us

For more information about St. Mary’s Laboratory Services, please call 415.750.5750.