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44 disclosed this week · 26,355 on record

Orange County Radiation Oncology Medical Group

Disclosed Jun 27, 20251,911 affectedConfirmed

Official notice

Orange County Radiation Oncology Medical Group, the covered entity (CE) reported that employees of its business associate (BA) were the targets of an email phishing scheme that impacted the protected health information (PHI) of 1,911 individuals. The PHI involved demographic and treatment information. The BA notified HHS, affected individuals, and the media on behalf of the CE. OCR provided technical assistance regarding the HIPAA Rules. In its mitigation efforts, the CE and BA implemented additional administrative, technical, and security safeguards to better protect sensitive data.

What is known

People affected1,911 (as reported to HHS)
DisclosedJun 27, 2025
HappenedDec 13, 2024
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 1911by backfillSource
disclosed2026-09-25
2025-07-15 to 2025-06-27by backfillSource
summary2026-09-25
empty to Orange County Radiation Oncology Medical Group, the covered entity (CE) reported that employees of its business associate (BA) were the targets of an email phishing scheme that impacted the protected health information (PHI) of 1,911 indiviby backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about Orange County Radiation Oncology Medical Group