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Hematology Oncology Associates

Disclosed May 21, 20197 years ago16,073 affectedConfirmed

Official notice

Hematology Oncology Associates, the covered entity (CE), reported that an employee was the victim of an email phishing scheme that affected the electronic protected health information (ePHI) of 17,213 individuals. The ePHI involved included names, addresses, birthdates, drivers’ license information, Social Security numbers, claims information, financial data, diagnoses/conditions, lab results, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the CE implemented additional administrative and technical safeguards and retrained its staff. In response to OCR’s investigation, the CE implemented enhanced security measures, including implementing a new security environment and updating information security policies and procedures.

What is known

People affected16,073 (as reported to HHS)
DisclosedMay 21, 2019
DiscoveredMar 19, 2019
HappenedDec 18, 2018
AttackHacking
Data exposedNames, Health
SectorHealthcare · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: Hematology Oncology Associatesoag.ca.gov · Official notice
Oregon DOJ breach notice: Hematology Oncology Associatesjustice.oregon.gov · Official notice
HHS OCR breach report (archive, resolved): Hematology Oncology Associates (Healthcare Provider, OR)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
California AGresidents of CAMay 21, 2019
HHS archivetotalMay 21, 201916,073
Oregon DOJresidents of ORMay 28, 201916,073
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 16073 · backfill source
  • 2026-09-25 · summary: empty to Hematology Oncology Associates, the covered entity (CE), reported that an employee was the victim of an email phishing scheme that affected the electronic protected health information (ePHI) of 17,213 individuals. The ePHI involved included · backfill source
  • 2026-09-25 · discovered: empty to 2019-03-19 · 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.

Everything about Hematology Oncology Associates

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