Radia Inc. Hit by CHAOS Ransomware Attack, Exposing Massive Trove of Sensitive Data Radia Inc., P.S., a leading U.S. physician-owned radiology group, has been targeted in a ransomware attack claimed by the cybercriminal group CHAOS. On July 16, 2026, the threat actor posted on the dark web, asserting that it had exfiltrated 655 gigabytes of the organization’s data, including highly sensitive patient, corporate, and employee records. The compromised data reportedly includes: - Patient records: Full names, Social Security numbers, medical record numbers, dates of birth, account details, diagnostic imaging reports, and billing histories. - Corporate financial documents: Accounts receivable/payable records, tax filings, banking details, 1099 forms, budgets, and CPA documents. - Legal files: High-level agreements, nondisclosure contracts, notary documents, and due diligence reports. - Employee information: Social Security numbers, 401(k) details, benefits data, I-9 forms, and payroll records from ADP. The breach, if confirmed, could impact patients and staff across Radia’s network of hospital partnerships and imaging centers in western Washington. The scope of exposed data spanning clinical, financial, legal, and HR records positions this as a significant incident for the regional healthcare sector. As of August 1, 2026, no official disclosures to state attorneys general or federal agencies have been identified. The claims remain unverified by Radia Inc. at this time.