Laboratory

An Important Department Behind The Scenes

The Queen of the Valley medical laboratory is recognized as having a significant role in our delivery of quality patient care. Since medical laboratory professionals often work out of the public eye, few people know much about the critically important testing that the laboratory staff performs every day. It is estimated that approximately 85 percent of all physician decisions regarding diagnosis and treatment are based on laboratory test results.

Outpatient Laboratory Services


NEW: Starting July 15, our Outpatient Lab will be by appointment only (no walk-ins)


In response to COVID-19 and encourage social distancing, patients must make an appointment prior to coming to the lab; Starting July 15, we will no longer accept walk-ins.

To ensure the safety of our patients and caregivers, patients are asked to wear a face covering, as recommended by the CDC, and anyone entering the lab will be required to have their temperature taken with an external thermometer.

Appointments are available by calling the number listed below:

Standard Hours: Monday-Friday: 6 a.m.-6 p.m. (note: hours may vary based on appointment schedule)

Phone Number: (707) 257-4062 or (833) 789-6802 (to make an appointment)


St. Joseph Health Prompt Care:
River Park Shopping Center
1621 West Imola Ave, Napa, CA 94559
Phone: (833) 789-6802
Laboratory Hours of Operation:
(effective 7/7, lab services will no longer be offered at the Prompt Care location and will be preformed at 980 Trancas Street instead)


Additional Lab Information

(External links are not endorsed by Queen of the Valley Medical Center or the St. Joseph Health. They are for information purposes only.)

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