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Gold Coast Health Plan

Disclosed Oct 5, 20187 years ago37,005 affectedConfirmed

Official notice

On October 5, 2018, the covered entity (CE), Gold Coast Health Plan, reported that phishing attacks compromised its workforce members’ emails, affecting 37,005 individuals. The types of protected health information (PHI) involved in the breach included names, dates of birth, Medi-Cal numbers, health plan names, claims information, diagnoses/conditions, and other treatment information. The CE provided breach notification to HHS, affected individuals, and the media. In response to the breach, the CE implemented new technical safeguards, trained its workforce members on phishing attacks, and implemented risk analysis and risk management plans as recommended by its security company. The CE also provided OCR with additional documentation including its revised policies and procedures and its new employee orientation packet relevant to this breach investigation. OCR obtained assurances that the CE implemented the corrective actions listed above. .

What is known

People affected37,005 (as reported to HHS)
DisclosedOct 5, 2018
HappenedJun 18, 2018
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: Gold Coast Health Planoag.ca.gov · Official notice
HHS OCR breach report (archive, resolved): Gold Coast Health Plan (Business Associate, CA)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
California AGresidents of CAOct 5, 2018
HHS archivetotalOct 5, 201837,005

Other breaches at Gold Coast Health Plan

BreachAffected
Disclosed Dec 30, 2025Dec 30, 20258 months agoHacking540
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 37005 · backfill source
  • 2026-09-25 · summary: empty to On October 5, 2018, the covered entity (CE), Gold Coast Health Plan, reported that phishing attacks compromised its workforce members’ emails, affecting 37,005 individuals. The types of protected health information (PHI) involved in the bre · 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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