Xsolis, Inc.

Healthcare technology provider Xsolis disclosed a phishing-related breach affecting approximately 1.4 million individuals, making it one of the largest healthcare data breaches reported in 2026. The company provides AI-powered utilization management and revenue cycle services to hospitals and health systems, meaning many affected patients had likely never heard of Xsolis despite their information being entrusted to the company by their healthcare providers. The compromised data reportedly included names, dates of birth, Social Security numbers, health insurance information and medical treatment information, impacting patients from organizations including Mayo Clinic, UW Medicine, VHC Health and numerous other healthcare systems.