Home / Breach tracker / United States / Harvard Pilgrim Health Care Harvard Pilgrim Health Care (United States) notified the California Attorney General of a data breach on 21 January 2025. The breach began on 28 March 2023, 665 days before it was reported.
Breach reported 21 January 2025
Status Confirmed breach
People affected Not reported yet
Reported 21 January 2025
Breach began 28 March 2023
Time to tell 665 days (the median in California’s notices over the last year: 154 days) What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
Sources
Official notices are read by code from the regulator’s own register. More notices to California . · Corrections and changes
Breach reported 3 October 2024
Status Confirmed breach
People affected Not reported yet
Reported 3 October 2024
Breach began 28 March 2023
Time to tell 555 days (the median in California’s notices over the last year: 154 days) What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
Sources
Official notices are read by code from the regulator’s own register. More notices to California . · Corrections and changes
Breach reported 15 February 2024
Status Confirmed breach
People affected 202 Delaware residents (one state’s count; the total can be higher)
Reported 15 February 2024
Breach began 28 March 2023
Time to tell 324 days (the median in California’s notices over the last year: 154 days) What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
What changed since it was first reported 29 October 2026 Confirmed breach, 202 Delaware residents (Delaware Attorney General) Sources
Official notices are read by code from the regulator’s own register. More notices to California , Delaware . · Corrections and changes
Breach reported 25 August 2023
Status Confirmed breach
People affected Not reported yet
Reported 25 August 2023
Breach began 28 March 2023
Time to tell 150 days (the median in California’s notices over the last year: 154 days) What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
Sources
Official notices are read by code from the regulator’s own register. More notices to California . · Corrections and changes
Breach reported 15 June 2023
Status Confirmed breach
People affected 8,358 Washington residents (one state’s count; the total can be higher)
Reported 15 June 2023
Across the state notices at least 8,982 people (Delaware and Washington: each state counts only its own residents)
Breach began 28 March 2023
Time to tell 79 days (the median in California’s notices over the last year: 154 days) What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
What changed since it was first reported 29 October 2026 Confirmed breach, 79 Delaware residents (Delaware Attorney General) 29 October 2026 Confirmed breach, 154 Delaware residents (Delaware Attorney General) 29 October 2026 Confirmed breach, 624 Delaware residents (Delaware Attorney General) 29 October 2026 Confirmed breach, 8,358 Washington residents (Washington Attorney General) Sources
Official notices are read by code from the regulator’s own register. More notices to California , Delaware , Washington . · Corrections and changes
Breach reported 14 June 2023
Status Confirmed breach
People affected 2,550,922 Oregon residents (one state’s count; the total can be higher)
Reported 14 June 2023
Across the state notices at least 2,559,613 people (Oregon, Washington and Delaware: each state counts only its own residents)
Breach began 28 March 2023
Time to tell 78 days (the median in California’s notices over the last year: 154 days) What was exposed
The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.
Sources
Official notices are read by code from the regulator’s own register. More notices to Oregon , Iowa , California , Washington , Delaware . · Corrections and changes
If Harvard Pilgrim Health Care had your data
Look for Harvard Pilgrim Health Care’s own notice or letter: it should say what of yours was involved. Keep it. The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Harvard Pilgrim Health Care has a password of yours, change it now to be safe. Expect scams that use your details: calls, texts or emails pretending to be Harvard Pilgrim Health Care, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.
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