McLaren Health Care

3 breaches2.9M affected in allHealthcaremclaren.org

INC ransomware attack on McLaren exposed data of 743,131 patientsRansomware exposed names, health records, Social Security numbers, insurance details and dates of birth. Reported to the HHS OCR.Ransomware743K affectedHealthcareUSJun 20, 2025 Hacking breachHacking exposed names and health records. Reported to the California AG.2.1M affectedHealthcareUSOct 20, 2023 Hacking breachHacking exposed names and health records. Reported to the HHS archive.65K affectedHealthcareUSJul 16, 2021

About

Every breach here links to its sources and official notices. Across Glyph: lawsuits, incidents and outages, the company profile.

Added2026-09-25

McLaren Health Care, 2021-07-16

attack2026-09-25

McLaren Health Care, 2023-10-20hacking

data_types2026-09-25

McLaren Health Care, 2023-10-20["names","health"]

records_basis2026-09-25

McLaren Health Care, 2023-10-20hhs

records2026-09-25

McLaren Health Care, 2023-10-202103881

disclosed2026-09-25

McLaren Health Care, 2023-10-202023-10-20

summary2026-09-25

McLaren Health Care, 2023-10-20The covered entity (CE), McLaren Health Care, reported that it experienced a cyber-attack that compromised the protected health information (PHI) of 2,103,881 individuals. The PHI involved included names, addresses, birthdates, Social Secur

occurred2026-09-25

McLaren Health Care, 2025-06-202024-07-17

source2026-09-25

McLaren Health Care, 2023-10-20https://ago.vermont.gov/document/2023-11-09-mclaren-health-care-data-breach-notice-consumers

source2026-09-25

McLaren Health Care, 2025-06-20https://ago.vermont.gov/document/2025-06-20-mclaren-health-care-data-breach-notice-consumers

attack2026-09-25

McLaren Health Care, 2025-06-20ransomware

data_types2026-09-25

McLaren Health Care, 2025-06-20["names","health","ssn","insurance","dob","other"]

disclosed2026-09-25

McLaren Health Care, 2025-06-202025-06-20

discovered2026-09-25

McLaren Health Care, 2025-06-202024-08-05

summary2026-09-25

McLaren Health Care, 2025-06-20McLaren Health Care began notifying 743,000 patients that a July 2024 INC ransomware attack, discovered August 5, 2024, exposed their data; the investigation finished May 5, 2025.

title2026-09-25

McLaren Health Care, 2025-06-20INC ransomware attack on McLaren exposed data of 743,131 patients

domain2026-09-25

McLaren Health Caremclaren.org

Added2026-09-25

McLaren Health Care, 2025-06-20

Added2026-09-25

McLaren Health Care, 2023-10-20

Added2026-09-25

McLaren Health Care