Contra Costa Health Plan

Contra Costa Health Plan notified California AG on Dec 13, 2018 of a data breach, which occurred on May 22, 2018. Data exposed: Social Security number, Medical / health information, Date of birth, Phone number, Postal address, Name.

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

Organization: Contra Costa Health Plan
Source: California AG · source record
Date reported: Dec 13, 2018
Date(s) of breach: Monday, December 1, 2014Tuesday, May 22, 2018
Residents affected: Not published by this source
Data exposed: Social Security number Medical / health information Date of birth Phone number Postal address Name
Notice letter: Sample notice (PDF)
Days to notice: 205 days from the end of the breach window (May 22, 2018, no discovery date in the letter) to the California record (Dec 13, 2018). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
Offered in the letter: 12 months of credit or identity monitoring through Experian
First seen by BreachTally: 2026-10-30 16:14 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.