The Sonoma Valley Hospital Laboratory is integral to the care of our patients and our community. We provide a full range of diagnostic testing. Skilled phlebotomists are available to draw blood samples from patients in all our patient care settings.

No appointment is needed for most laboratory testing. However, glucose tolerance tests require an appointment so that we can coordinate your Glucola. All other testing is done on a first come, first served basis. 

Please see our Frequently Asked Questions for specific concerns you may have about your testing process.

Our office hours are Monday through Friday, 7:00 am through 5:00 pm, and Saturdays 8:00 am until noon. Please be sure and check in with Admitting prior to coming to the Lab.

Medical Director - Ralph Mitarai, MD
Laboratory Manager - Lois Valenzuela

Important Contact Numbers

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