San Bernardino County on behalf of Arrowhead Regional Medical Center

San Bernardino County on behalf of Arrowhead Regional Medical Center notified California AG on Sep 28, 2026 of a data breach, which occurred on Aug 28, 2026. Data exposed: Financial / bank account, Medical / health information, Postal address, Name.

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

Organization: San Bernardino County on behalf of Arrowhead Regional Medical Center
Source: California AG · source record
Date reported: Sep 28, 2026
Date(s) of breach: Friday, August 28, 2026
Residents affected: Not published by this source
Data exposed: Financial / bank account Medical / health information Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Aug 28, 2026, as stated in the letter
"On August 28, 2026, Buchalter learned that a limited amount of Buchalter data was subject to unauthorized acquisition."
Days to notice: 31 days from discovery (Aug 28, 2026) to the California record (Sep 28, 2026). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter: 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 15:26 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.