AdaptHealth Corp. determined on June 27, 2026, that a cybersecurity incident involving unauthorized access to cloud-based business applications, including patient management systems, was material. A social engineering attack on a third-party contractor's session was the cause, resulting in the exfiltration of insurance billing passwords and patient protected health information. The company is investigating the scope and volume of data at risk, and the full financial impact remains undetermined. AdaptHealth Corp. provides medical equipment and services for home healthcare.