Harvard Pilgrim Health Care

Harvard Pilgrim Health Care notified California AG on Jan 21, 2025 of a data breach, which occurred on Apr 17, 2023. Data exposed: Medical / health information, Health insurance, Date of birth, Postal address, Name.

All 9 filings by Harvard Pilgrim Health Care, state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization: Harvard Pilgrim Health Care
Source: California AG · source record
Date reported: Jan 21, 2025
Date(s) of breach: Tuesday, March 28, 2023Monday, April 17, 2023
Residents affected: Not published by this source
Data exposed: Medical / health information Health insurance Date of birth Postal address Name
Notice letter: Sample notice (PDF)
Discovered: Apr 17, 2023, as stated in the letter
"What Happened On April 17, 2023, Harvard Pilgrim discovered it was the victim of a cybersecurity ransomware incident that impacted systems used to service members, accounts, brokers and providers."
Days to notice: 645 days from discovery (Apr 17, 2023) to the California record (Jan 21, 2025). 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
Third party: The letter attributes the incident to a vendor or service provider
First seen by BreachTally: 2026-10-30 15:38 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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Other filings by Harvard Pilgrim Health Care

Organization	Source	State	Reported	Residents affected	Data exposed
Harvard Pilgrim Health Care, Inc.	HHS OCR	US	Jul 21, 2026	1,168	Medical / health information
Harvard Pilgrim Health Care	California AG	CA	Oct 3, 2024	Not published	Medical / health informationName
Harvard Pilgrim Health Care	California AG	CA	Mar 27, 2024	Not published	Name
Harvard Pilgrim Health Care	California AG	CA	Feb 15, 2024	Not published	Name
Harvard Pilgrim Health Care	California AG	CA	Aug 25, 2023	Not published	Social Security numberMedical / health informationHealth insuranceDate of birth+3
Harvard Pilgrim Health Care	California AG	CA	Jul 20, 2023	Not published	Social Security numberMedical / health informationHealth insuranceDate of birth+3
Harvard Pilgrim Health Care	Oregon DOJ	OR	Jun 15, 2023	2,550,922	Not stated
Harvard Pilgrim Health Care	Delaware DOJ	DE	Jun 15, 2023	624	Social Security numberMedical / health informationHealth insuranceDate of birth+3

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