[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fcgnf1ozgu42r":3},{"success":4,"breach":5},true,{"_id":6,"name":7,"title":8,"slug":9,"domain":10,"breachDate":11,"addedDate":12,"publishedAt":13,"modifiedDate":12,"contentUpdatedAt":14,"source":15,"sourceUrl":16,"sourceUrls":17,"pwnCount":24,"affectedCount":24,"affectedCountStatus":25,"affectedCountLowerBound":13,"affectedCountUnit":26,"hasEnglishDescription":4,"contentLocale":27,"availableLocales":28,"translations":30,"severity":33,"dataClasses":34,"description":41,"seoTitle":42,"seoDescription":43,"logoUrl":44,"isVerified":4,"isSensitive":4,"isSpamList":45,"isMalware":45,"company":46},"6a4f9249d41c70dce5ce5f47","McLaren Health Care 2024","McLaren Health Care 2024 Data Breach","mclaren-health-care-2024","mclaren.org","2024-07-17T00:00:00.000Z","2026-07-09T12:21:29.637Z",null,"2026-07-19T00:11:08.600Z","Official notice; state regulator notice; federal health breach portal; healthcare security reporting; settlement information; official organization profile and logo reference","https:\u002F\u002Fwww.classaction.org\u002Fmedia\u002Fmclaren-health-care-data-breach-appendix-2025.pdf",[16,18,19,20,21,22,23],"https:\u002F\u002Fwww.maine.gov\u002Fagviewer\u002Fcontent\u002Fag\u002F985235c7-cb95-4be2-8792-a1252b4f8318\u002F79a56f34-ffbe-4621-a74c-9b1e49477904.html","https:\u002F\u002Focrportal.hhs.gov\u002Focr\u002Fbreach\u002Fbreach_report_hip.jsf","https:\u002F\u002Fwww.hipaajournal.com\u002Fmclaren-health-care-investigating-potential-cyberattack\u002F","https:\u002F\u002Fmhccsettlement.com\u002F","https:\u002F\u002Fwww.mclaren.org\u002Fmain\u002Fabout-mclaren-health-care","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FFile:McLaren_Health_Care_Corporation_logo.svg",743131,"known","unknown","en",[27,29],"tr",{"en":31,"tr":32},{"slug":9},{"slug":9},"High",[35,36,37,38,39,40],"Names","Social security numbers","Driver's license numbers","Medical information","Health insurance information","Protected health information","\u003Cp>The McLaren Health Care 2024 data breach is an unauthorized access incident that occurred in the Michigan-based health system McLaren Health Care and the Karmanos Cancer Institute network. The organization noticed suspicious activity on some of its computer systems around August 5, 2024, and initiated an investigation to secure its network and determine the scope of the incident. As a result of the investigation, it was reported that the unauthorized access occurred between July 17, 2024, and August 3, 2024, and the detailed assessment of the affected files was completed on May 5, 2025.\u003C\u002Fp>\n\u003Cp>This record treats the McLaren Health Care 2024 data breach separately from previous McLaren incidents. The same institution had previously appeared in the news for other security incidents occurring at different time periods; the date, scope, and impact figures used here are for the McLaren\u002FKarmanos network access in the summer of 2024. The number of affected individuals has been reported as 743,131. This number is not the count of unique online accounts confirmed to have been leaked, but the impact figure used for individuals reported or potentially affected in the incident.\u003C\u002Fp>\n\u003Ch2>Leaking Data Types and Risks\u003C\u002Fh2>\n\u003Cp>Within the scope of the McLaren Health Care 2024 incident, the types of data confirmed to be at risk are first and last name, Social Security number, driver's license number, medical information, and health insurance information. When these fields are evaluated together, the incident is not limited to contact information alone; it is a sensitive patient data incident that can simultaneously affect identity, healthcare, and insurance relationships. It is not claimed that every affected individual has all of these fields; the types of data reported may vary by person.\u003C\u002Fp>\n\u003Cp>Since social security numbers and driver’s license numbers are permanent identity fields, they pose a risk of misuse in credit applications, opening fake accounts, official transaction fraud, and identity verification stages. Medical information and health insurance details, on the other hand, can lead to more sensitive consequences in terms of fraudulent health service claims, incorrect billing, insurance file abuse, and privacy violations. The combination of the patient’s name and health insurance information may allow attackers to prepare more convincing fraud messages by using the name of a real institution.\u003C\u002Fp>\n\u003Ch2>Verified Scope and Boundaries\u003C\u002Fh2>\n\u003Cp>In this record, the start of the breach is used as July 17, 2024, and the date the incident was noticed as August 5, 2024. The unauthorized access period is between July 17, 2024, and August 3, 2024. The completion of the file review on May 5, 2025, is the main reason notifications were made months after the incident. Therefore, the record date should not be considered the same as the notification date; the incident occurred in the summer months, and information was provided to the affected individuals in 2025.\u003C\u002Fp>\n\u003Cp>Data classes are limited to the fields explicitly stated in official notifications. Although broader data headings may appear on some secondary pages, additional fields such as date of birth, address, or financial account information have not been used in this record; because these fields are not verified in the main notification text as fixed and general data types. The record focuses on network access affecting McLaren Health Care and Karmanos Cancer Institute systems. The name and date range have been separately distinguished to avoid confusion with the 2023 McLaren incident.\u003C\u002Fp>\n\u003Ch2>User Groups at Risk\u003C\u002Fh2>\n\u003Cp>The main group at risk consists of current and former patients who have received health care through the McLaren Health Care network or the Karmanos Cancer Institute. Individuals who have registered due to cancer care, hospital services, specialist visits, diagnostic services, treatment processes, or health insurance procedures may have been affected by this incident. Even if a person does not directly recall the McLaren name, they may be included in the notification if they have received services through Karmanos or its affiliated health units.\u003C\u002Fp>\n\u003Cp>Individuals whose Social Security number or driver's license number is exposed are at higher risk for identity theft. For those with medical information or health insurance details, fraudulent healthcare claims and unknown insurance activities become more significant. For individuals associated with sensitive medical processes such as cancer treatment or hospital services, privacy risk should also be considered. Therefore, simply changing a password is not sufficient; identity, insurance, and health record checks should be addressed together.\u003C\u002Fp>\n\u003Ch2>Urgent Measures to Be Taken\u003C\u002Fh2>\n\u003Cp>Individuals who may have been affected by the McLaren Health Care 2024 data breach should first check which types of data are included in the notice they received. If a Social Security number or driver's license number is involved, a credit report should be obtained, and options for credit freeze or fraud alert should be considered. Early warning signs for account openings, credit applications, phone line, or official transaction attempts that can be made with identification documents should be monitored regularly.\u003C\u002Fp>\n\u003Cp>If medical information or health insurance information is at risk, insurance explanation documents, patient account transactions, unknown appointment and procedure records should be regularly checked. If unidentified healthcare services, unexplained bills, incorrect provider names, or unexpected insurance claims are seen, written contact should be made with the relevant institution. Unexpected connections coming under the pretense of free identity protection, insurance updates, correcting treatment records, or payment refunds should not be clicked. Official channels on the notification letter or independently verified channels should be used to contact the institution.\u003C\u002Fp>\n\u003Ch2>Long-Term Security Strategies\u003C\u002Fh2>\n\u003Cp>In this incident, since identity and health data are at risk together, the protection process should be spread over the long term. Changing the password only helps with patient account or email security; fields such as Social Security number, driver’s license number, and health insurance information are difficult to change and can be misused even years later. Users should check their credit reports at regular intervals, be cautious of fraudulent application risks during tax periods, and use alerts that detect new account openings early.\u003C\u002Fp>\n\u003Cp>On the health side, patient accounts and insurance transactions should be regularly monitored. Unknown health services, incorrect diagnoses, unexpected laboratory or imaging records, and unexplained insurance claims are long-term risk indicators. Unique strong passwords should be used for patient accounts, and multi-factor authentication should be enabled wherever possible. Fraudulent messages containing health information may appear personalized; therefore, messages containing the institution's name, doctor's name, treatment details, or insurance information should not be considered reliable without verification through an independent channel.\u003C\u002Fp>\n\u003Ch2>Record Control and User Action\u003C\u002Fh2>\n\u003Cp>The record check on this page allows the user to see personal and health data records that may be associated with the McLaren Health Care 2024 data breach. A match does not mean that all types of data listed were exposed for the same individual. Each user's exact risk level should be assessed based on the types of data specified in the notification sent to them and their service history with McLaren or Karmanos.\u003C\u002Fp>\n\u003Cp>Users who see matches should sort their steps according to the type of data. If there is an identification number or driver’s license information, credit and official transaction checks should be prioritized. If there is health information or health insurance information, patient accounts, insurance explanation documents, and unknown service requests should be regularly reviewed. The McLaren Health Care 2024 data breach is a large-scale health data security incident that shows that after network access in health systems, file review can take months, and users need to check their records not only during the initial notification period but also in the long term.\u003C\u002Fp>","McLaren Health Care 2024 Data Breach (743.1 Thousand Reported Records)","McLaren Health Care 2024 Data Breach. 743.1 Thousand reported records are reported. Reported data: Names, Social security numbers, Driver's license numbers…","\u002Fuploads\u002Flogo\u002Fmclaren-health-care-2024.svg",false,{"name":47,"sector":48,"country":49,"website":10,"websiteArchiveUrl":50,"websiteStatus":50,"websiteCheckedAt":13},"McLaren Health Care","Healthcare","United States",""]