Effective October 25th, 2013, Laboratory Corporation of America (LabCorp) acquired John Muir Health’s MuirLab patient service centers. All sites are now owned and operated by LabCorp and patients may use LabCorp for their laboratory services or seek another provider of choice based on insurance coverage or personal preference.

View locations of our lab services at John Muir Health.

For billing questions related to MuirLab services received prior to October 25, 2013, please call (925) 692-5605.

For all other lab-related questions, please call (925) 692-5600.

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