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Latest / California / February 2023

Highmark

Highmark notified California AG on Feb 3, 2023 of a data breach, which occurred on Dec 15, 2022. Data exposed: Social Security number, Financial / bank account, Medical / health information, Usernames / passwords, Email address, Phone number, Postal address, Name.

All 3 filings by Highmark, state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
Highmark
Source
California AG · source record
Date reported
Feb 3, 2023
Date(s) of breach
Tuesday, December 13, 2022Wednesday, December 14, 2022Thursday, December 15, 2022
Residents affected
Not published by this source
Data exposed
Social Security number Financial / bank account Medical / health information Usernames / passwords Email address Phone number Postal address Name
Notice letter
Sample notice (PDF)
Discovered
Dec 15, 2022, as stated in the letter
"On December 15, 2022, Highmark discovered that a Cyber Security Incident occurred whereby an employee was sent a malicious email link that led to their email account being compromised."
Days to notice
50 days from discovery (Dec 15, 2022) to the California record (Feb 3, 2023). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter
24 months of credit or identity monitoring through Experian
First seen by BreachTally
2026-10-30 16:00 UTC

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

First seen by BreachTally at 16:00 UTC on Oct 30, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by Highmark

OrganizationSourceStateReportedResidents affectedData exposed
Highmark, Inc. Delaware DOJ DE Feb 10, 2023 559 Social Security numberFinancial / bank accountMedical / health informationHealth insurance+6
Highmark Inc. California AG CA Jun 24, 2021 Not published Medical / health informationUsernames / passwordsEmail address

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