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Thousands of Corewell Health patients affected by security breach

ID: 56dd8495-fe3b-5f91-9546-18178321ac52

STIX ID: report--56dd8495-fe3b-5f91-9546-18178321ac52

Feed Name: DataBreaches.Net

Threat Score
65/100

Date Published: 2026-03-28

Date Updated: 2026-04-19

Author: Dissent

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Corewell Health announced that a former vendor, Pinnacle Holdings, experienced a data breach in 2024 that affected approximately 19,000 patients; exposed information included names, contact details, Social Security numbers, medical information, and insurance details.

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