Hospital Sisters Health Systems ("HSHS")

Hospital Sisters Health Systems ("HSHS") notified California AG on Feb 6, 2025 of a data breach, which occurred on Aug 27, 2023. Data exposed: Social Security number, Medical / health information, Health insurance, Date of birth, Postal address, Name.

Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Hospital Sisters Health Systems ("HSHS")
Source: California AG · source record
Date reported: Feb 6, 2025
Date(s) of breach: Wednesday, August 16, 2023Sunday, August 27, 2023
Residents affected: Not published by this source
Data exposed: Social Security number Medical / health information Health insurance Date of birth Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Aug 27, 2023, as stated in the letter
"On August 27, 2023, HSHS discovered an unauthorized third party gained temporary access to HSHS’s network."
Days to notice: 529 days from discovery (Aug 27, 2023) to the California record (Feb 6, 2025). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter: 12 months of credit or identity monitoring through Experian
Third party: The letter attributes the incident to a vendor or service provider
First seen by BreachTally: 2026-10-30 15:31 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

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Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.