US health insurance giant UnitedHealth Group said in a filing with government regulators on Thursday that its subsidiary Change Healthcare may have been compromised by government-backed hackers.
In a filing Thursday, UHG blamed the ongoing cybersecurity incident affecting Change Healthcare on suspected nation-state hackers, but said there was no time for the system to come back online.
UHG did not attribute the cyberattack to any specific country or government, nor did it say what evidence it had to support the claim.
A company spokesperson did not respond to a request for comment at the time of writing.
Change Healthcare provides patient billing across the U.S. healthcare system. The company claims to process billions of healthcare transactions each year and handles about a third of U.S. patient records, or about 100 million Americans.
The cyberattack began early Wednesday, according to the company’s incident tracker.
Change Healthcare has not yet disclosed the specific nature of the cyberattack.
Pharmacies across the U.S. are reporting that they are unable to fill prescriptions through patients’ insurance due to ongoing outages at Change Healthcare, which handles much of the billing process.
Several people who work in the healthcare sector and are affected by the disruption told TechCrunch that they are experiencing downtime due to the ongoing cyberattack.
UHG said in the filing that it “has top-notch security experts, is cooperating with law enforcement, and has notified our clients, clients, and certain government agencies.”
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