Every public data breach

47 disclosed this week · 26,367 on record

Trillium Community Health Plan

Disclosed Mar 3, 202187,761 affectedConfirmed

Official notice

The covered entity (CE), Trillium Community Health Plan, reported that its business associate (BA) experienced a cyber-attack that affected the electronic protected health information (ePHI) of 87,761 individuals. The ePHI involved included names, addresses, dates of birth, health insurance information, diagnoses, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice. Following the breach, the CE provided complimentary identity protection services to affected individuals and terminated its contract with the BA.

What is known

People affected87,761 (as reported to HHS)
DisclosedMar 3, 2021
DiscoveredSep 17, 2021
HappenedMar 4, 2021
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
empty to hhsby backfillSource
records2026-09-25
empty to 87761by backfillSource
disclosed2026-09-25
2021-03-04 to 2021-03-03by backfillSource
summary2026-09-25
empty to The covered entity (CE), Trillium Community Health Plan, reported that its business associate (BA) experienced a cyber-attack that affected the electronic protected health information (ePHI) of 87,761 individuals. The ePHI involved includedby backfillSource
disclosed2026-09-25
2022-01-07 to 2021-03-04by backfillSource
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (Oregon DOJ), confirmed by Oregon DOJ. Record counts are as reported. Not legal advice.

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