UnitedHealth Group, the largest insurer in the U.S., has confirmed a ransomware attack on its health tech subsidiary, Change Healthcare, which has significantly disrupted operations at hospitals and pharmacies across the country for nearly a week. The ransomware gang identified as ALPHV, also known as BlackCat, is behind the attack, causing widespread prescription order disruptions and impacting the payment process for healthcare providers. The cyberattack has led to pharmacies implementing electronic or offline workarounds for claims processing, with over 90% of U.S. pharmacies affected by the seventh day. The Department of Justice has also launched an antitrust investigation into UnitedHealth Group amidst this crisis. The outage is expected to persist for several weeks, with UnitedHealth planning for the disruptions to continue. This event underscores the vulnerabilities in the healthcare sector to cyber threats and the impact of consolidation within the industry.