Lab Services at Parnassus

UCSF Lab Services at Parnassus performs diagnostic tests for patients receiving care in our hospital and clinics as well as for our medical research community. Your doctor may order certain tests that can help them diagnose or manage your condition.

UCSF laboratories perform more than 10 million tests every year. Our state-licensed labs are certified under the federal Clinical Laboratory Improvement Amendments program and accredited by the College of American Pathologists. We are dedicated to providing safe and excellent services.

All UCSF blood draw locations – including Lab Services at Parnassus – accept patients on a walk-in basis. If you need your blood drawn, please use this list of locations to find your most convenient option, including sites specifically for children or for patients with cancer. The list includes contact information and operating hours for each site.

The special test instructions page has information on where and when various tests are available.

For faster service, some labs offer self-scheduling through the MyChart website or app. Lab appointments can be scheduled or canceled only by the patient.

Notice for patients of Saint Francis and St. Mary's hospitals

Lab Services at Parnassus cannot access electronic orders placed by providers at UCSF Health Saint Francis Hospital or UCSF Health St. Mary's Hospital. If you have an electronic order for a lab test from Saint Francis or St. Mary's, please use your usual blood draw location. We can, however, accept paper lab orders from Saint Francis and St. Mary's. Thank you for your cooperation in helping us provide the best possible care.