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44 disclosed this week · 26,355 on record

BioReference Laboratories

Disclosed Jul 29, 2019425,749 affectedConfirmed

Official notice

BioReference Laboratories, Inc., the covered entity (CE), reported that Retrieval-Masters Creditors Bureau, Inc., doing business as American Medical Collection Agency (AMCA), its business associate (BA), was the victim of a cyber-attack that affected the electronic protected health information (ePHI) of 425,749 individuals. The ePHI involved included names, birthdates, clinical information, health insurance information, and treatment information. The CE notified HHS, affected individuals, and the media. As a result of OCR’s investigation, the CE implemented additional administrative safeguards to better protect its sensitive data. As a consequence of this breach incident, the CE terminated its business relationship with the BA.

What is known

People affected425,749 (as reported to HHS)
DisclosedJul 29, 2019
DiscoveredJun 3, 2019
HappenedAug 1, 2018
AttackHacking
Data exposedNamesPayment cardsFinancialHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at BioReference Laboratories

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
["names","payment-card","financial"] to ["names","payment-card","financial","health"]by backfillSource
records_basis2026-09-25
organization to hhsby backfillSource
records2026-09-25
6600 to 425749by backfillSource
summary2026-09-25
empty to BioReference Laboratories, Inc., the covered entity (CE), reported that Retrieval-Masters Creditors Bureau, Inc., doing business as American Medical Collection Agency (AMCA), its business associate (BA), was the victim of a cyber-attack thaby backfillSource
Added2026-09-25
First recordedby backfillSource

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

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