Data encrypted in cyberattack on Ascension Wisconsin vendor

A third-party vendor said Glendale-based Ascension Wisconsin may have been caught in a cyberattack that compromised patient data.

ConsensioHealth, which provides administrative services to medical practices, reported in January that the health system was among the healthcare organizations that may have been affected by the July hack. The company said it discovered its data was encrypted that month and "eradicated the threat" before determining that hackers had stolen a "number of files and folders."

The files contained personal and health data including names, addresses, dates of birth, Social Security numbers, and medical treatment information. ConsensioHealth is notifying affected individuals by mail but is unaware of any misuse of data. Ascension Wisconsin declined to comment beyond what was in the notice.

Third-party data breaches have become an increased focus of health system cybersecurity leaders in recent years.

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