Belden

Disclosed Dec 14, 20209,840 affectedConfirmed

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 affected	9,840 (as reported to HHS)
Disclosed	Dec 14, 2020
Discovered	Nov 15, 2020
Happened	Nov 12, 2020
Attack	Hacking
Data exposed	NamesHealth
Sector	Insurance · US
Status	Confirmed

Sources

Official noticeoag.ca.gov

California Attorney General breach notice: Belden

Official noticejustice.oregon.gov

Oregon DOJ breach notice: Belden

Official noticein.gov

Indiana Attorney General 2021 data breach report: Belden

Official noticeocrportal.hhs.gov

HHS OCR breach report (archive, resolved): Belden (Health Plan, MO)

Notices filed

Residents of CADec 14, 2020

California AGCount not stated

Residents of ORDec 14, 2020

Oregon DOJ5,364 people

Residents of INDec 14, 2020

Indiana AG2,227 people

TotalApr 2, 2021

HHS archive9,840 people

Other breaches at Belden

Breach, details not statedBreach notice filed with the Indiana AG, details not stated.376 affectedUSFeb 13, 2023

History of this record

sector2026-09-25

other to insuranceby backfillSource

attack2026-09-25

unknown to hackingby backfillSource

data_types2026-09-25

[] to ["names","health"]by backfillSource

records_basis2026-09-25

organization to hhsby backfillSource

records2026-09-25

5364 to 9840by backfillSource

summary2026-09-25

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 healby backfillSource

records_basis2026-09-25

empty to organizationby backfillSource

records2026-09-25

empty to 5364by backfillSource

occurred2026-09-25

empty to 2020-11-12by backfillSource

discovered2026-09-25

empty to 2020-11-15by 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 Belden