Case file: Highmark, Inc.
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 9, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Dec 13, 2022 to Dec 15, 2022
- Discovered
- Dec 15, 2022, as stated in the Delaware letter
- State and federal records
- 2 filings, Feb 3, 2023 to Feb 10, 2023
- Residents counted
- 559 in 1 state (DE), latest filing per state
- Everyone affected
- No filing gives a total
- Information exposed
- Social Security number, Financial / bank account, Medical / health information, Health insurance, Date of birth, Usernames / passwords, Email address, Phone number, Postal address
- Offered to those affected
- 24 months of credit or identity monitoring through Experian
- Third party named
- No
- Days to notice
- Past the statutory period in 1 of the 2 states that set one, counted from discovery to each state's first record
- Prior incidents
- 1 earlier incident on record for this organization
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."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| Delaware Delaware DOJ | Feb 10, 2023 | 559 | 57 days, statute 60 days | Letter Record | |
| California California AG | Feb 3, 2023 | Not published | 50 days, statute 30 days, over | Letter Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Notice timing, state by state
- 57 days from discovery (Dec 15, 2022) to the Delaware record (Feb 10, 2023). Statute: 60 days from determination of the breach (6 Del. C. § 12B-102).
- 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).
The statutes
- Delaware: 60 days to notify residents from determination of the breach, 6 Del. C. § 12B-102. Attorney General when more than 500 Delaware residents are affected, no later than the resident notice.
- California: 30 days to notify residents from discovery or notification of the breach, Cal. Civ. Code § 1798.82. Sample notice to the Attorney General when more than 500 Californians are notified, within 15 days of the consumer notice (effective 2026).
Prior incidents by Highmark, Inc.
| Records | Breach window | Filed with | People |
|---|---|---|---|
| Jun 24, 2021 | Dec 23, 2020 | California | n/a |
Filings more than six months apart are shown as separate incidents.
Filings by others that name Highmark, Inc.
Clients of a breached vendor often file under their own names and name the vendor.
- Highmark Health, Oregon, Jul 7, 2023
- Matrix Medical Network (“Matrix”) contracts with OneTouchPoint, Inc. (Matrix client name: Highmark DE), Delaware, Jul 27, 2022, 7
Sources and method
Records as published by Delaware DOJ, California AG. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 2 letters read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.