Timeline of the Ransomware Attack on Change Healthcare: How It Unfolded

 

Earlier this year, a ransomware attack targeted Change Healthcare, a health tech company owned by UnitedHealth, marking one of the most significant breaches of U.S. health and medical data in history.
Months after the breach occurred in February, a large number of Americans are receiving notification letters stating that their personal and health information was compromised during the cyberattack on Change Healthcare.
Change Healthcare plays a critical role in processing billing and insurance for hundreds of thousands of hospitals, pharmacies, and medical practices across the U.S. healthcare sector. Consequently, the company stores an extensive amount of sensitive medical data on patients in the United States. Through a series of mergers and acquisitions, Change Healthcare has grown into one of the largest processors of U.S. health data, handling between one-third and one-half of all U.S. health transactions.
Key Events Following the Ransomware Attack:
  • February 21, 2024: The first signs of trouble emerged when outages began affecting doctors’ offices and healthcare practices, disrupting billing systems and insurance claims processing. Change Healthcare’s status page was inundated with outage notifications impacting all aspects of its business. The company later confirmed a “network interruption related to a cybersecurity issue,” indicating a

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