Skip to main content
photo of john muir health website

John Muir Health Walnut Creek Data Breach Investigation

The Lyon Firm is actively involved in class action personal privacy and data theft cases and is currently investigating John Muir Health data breach claims for California plaintiffs.

An internal error led to patient data mismanagement at John Muir Health Walnut Creek Medical Center (California).

According to a data breach notice the hospital filed with the California attorney general, an employee from John Muir Health Walnut Creek Medical created a website that linked to an Excel file containing sensitive patient information.

The hospital said between July 1, 2021, and Sept. 27, 2022, patient information may have been accessed by unauthorized users.

Joe Lyon is a highly-rated data breach lawyer and Privacy Attorney representing plaintiffs nationwide in class action security breach lawsuits.