Change Healthcare attack halts US claims and pharmacy payments
An ALPHV/BlackCat ransomware attack on UnitedHealth's Change Healthcare took down the clearing house that processes a large share of US medical claims, leaving pharmacies and providers unable to bill or get paid for weeks.
- Service
- Change Healthcare
- Date
- 21 February 2024
- Cause
- Cyberattack
- Duration
- Not stated or multi-day
- Status
- resolved
- Severity
- critical
- Region
- Global
- Source
- Infosecurity Magazine ↗
Cite this
Nuffield Consulting, “Change Healthcare attack halts US claims and pharmacy payments”, The Daily Tech Wire outage & breach log, 21 Feb 2024. https://techwire.nuffieldconsulting.com/incidents/2024-02-21-change-healthcare-outage/ (retrieved 15 Nov 2026).
This entry summarises public reporting. Please also cite the original source: Infosecurity Magazine, https://infosecurity-magazine.com/news-features/top-cyber-attacks-2024.
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