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Belden

Disclosed Dec 14, 20205 years ago9,840 affectedConfirmed

Official notice

The covered entity (CE), Belden, reported that it experienced a cybersecurity incident affecting the protected health information (PHI) of 9,840 individuals. The PHI involved included names, dates of birth, Social Security numbers, and health insurance information. The CE notified HHS, affected individuals, the media, and law enforcement. In its mitigation efforts, the CE provided complimentary credit monitoring services and implemented additional technical and administrative safeguards to better protect its PHI. OCR provided technical assistance to the CE.

What is known

People affected9,840 (as reported to HHS)
DisclosedDec 14, 2020
DiscoveredNov 15, 2020
HappenedNov 12, 2020
AttackHacking
Data exposedNames, Health
SectorInsurance · US
StatusConfirmed

Sources

Source
California Attorney General breach notice: Beldenoag.ca.gov · Official notice
Oregon DOJ breach notice: Beldenjustice.oregon.gov · Official notice
Indiana Attorney General 2021 data breach report: Beldenin.gov · Official notice
HHS OCR breach report (archive, resolved): Belden (Health Plan, MO)ocrportal.hhs.gov · Official notice

Notices filed

WhereFiledPeople
California AGresidents of CADec 14, 2020
Oregon DOJresidents of ORDec 14, 20205,364
Indiana AGresidents of INDec 14, 20202,227
HHS archivetotalApr 2, 20219,840

Other breaches at Belden

BreachAffected
Disclosed Feb 13, 2023Feb 13, 20233 years ago376
History of this record
  • 2026-09-25 · sector: other to insurance · backfill source
  • 2026-09-25 · attack: unknown to hacking · backfill source
  • 2026-09-25 · data_types: [] to ["names","health"] · backfill source
  • 2026-09-25 · records_basis: organization to hhs · backfill source
  • 2026-09-25 · records: 5364 to 9840 · backfill source
  • 2026-09-25 · summary: empty to The covered entity (CE), Belden, reported that it experienced a cybersecurity incident affecting the protected health information (PHI) of 9,840 individuals. The PHI involved included names, dates of birth, Social Security numbers, and heal · backfill source
  • 2026-09-25 · records_basis: empty to organization · backfill source
  • 2026-09-25 · records: empty to 5364 · backfill source
  • 2026-09-25 · occurred: empty to 2020-11-12 · backfill source
  • 2026-09-25 · discovered: empty to 2020-11-15 · 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 Belden

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