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City of Hope

Disclosed Aug 3, 20179 years ago3,400 affectedConfirmed

Official notice

City of Hope, the covered entity (CE), reported that a workforce member was a victim of an email phishing scheme. This breach affected 3,400 individuals. The protected health information (PHI) involved in the breach included names, addresses, dates of birth, social security numbers, diagnosis, lab results, medications, and other treatment information. Following the breach, the covered entity disabled remote access to its virtual private network, including email. Additionally, OCR’s investigation resulted in the covered entity improving their security safeguards and retraining employees.

What is known

People affected3,400 (as reported to HHS)
DisclosedAug 3, 2017
HappenedMay 31, 2017
AttackHacking
Data exposedNames, Health
SectorGovernment · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: City of Hopeoag.ca.gov · Official notice
HHS OCR breach report (archive, resolved): City of Hope (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
California AGresidents of CAAug 3, 2017
HHS archivetotalAug 3, 20173,400

Other breaches at City of Hope

BreachAffected
Disclosed Dec 12, 2023Dec 12, 20232 years agoHacking903K
Disclosed Mar 4, 2016Mar 4, 201610 years agoHacking1,024
History of this record
  • 2026-09-25 · attack: unknown to hacking · backfill source
  • 2026-09-25 · data_types: [] to ["names","health"] · backfill source
  • 2026-09-25 · records_basis: empty to hhs · backfill source
  • 2026-09-25 · records: empty to 3400 · backfill source
  • 2026-09-25 · summary: empty to City of Hope, the covered entity (CE), reported that a workforce member was a victim of an email phishing scheme. This breach affected 3,400 individuals. The protected health information (PHI) involved in the breach included names, addresse · backfill source
  • 2026-09-25 · added · backfill source

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

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