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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.

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)
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.

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
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 data types and the letter. Start a 14-day free trial.

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