St. Rose Hospital Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating Hayward Sisters Hospital, which does business as St. Rose Hospital, regarding its recent data breach. The St. Rose Hospital data breach involved sensitive personal identifiable information belonging to an undetermined number of individuals.


St. Rose Hospital is a full-service health care provider and hospital serving central and southern Alameda County, California. Officially established in 1962, St. Rose Hospital’s construction was the fruition of efforts dating back to 1953 to build a hospital for California’s East Bay community. Over the next seven decades, St. Rose Hospital rapidly grew through several mergers, acquisitions, and expansions. Today, St. Rose Hospital manages several clinics and partnerships around Alameda and Contra Costa Counties. Services offered by St. Rose Hospital include everything from emergency care to orthopedics and diagnostic imaging. Located in Hayward, California, St. Rose Hospital employs more than 400 individuals.


On November 29, 2022, St. Rose Hospital discovered that it had experienced a data breach in which the sensitive personal identifiable information in its systems may have been accessed and acquired. Through its investigation, St. Rose Hospital determined that an unauthorized actor accessed and obtained this sensitive information on or about November 18, 2022. On January 12, 2022, St. Rose Hospital began contacting individuals whose information may have been impacted. The type of information exposed includes:

  • Name
  • Social Security number
  • Date of birth
  • Address
  • Contact information (e.g., email address)

If you received a breach notification letter from St. Rose Hospital:

We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at (608) 237-1775 or

If you were impacted by the St. Rose Hospital data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review the breach notice and retain a copy;
  2. Enroll in any free credit monitoring services provided by Hayward Sisters Hospital;
  3. Change passwords and security questions for online accounts;
  4. Regularly review account statements for signs of fraud or unauthorized activity;
  5. Monitor credit reports for signs of identity theft; and
  6. Contact a credit bureau(s) to request a temporary fraud alert.

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