Notice of Data Security Incident

Compumedics USA, Inc. (“Compumedics”) is committed to protecting the confidentiality and security of the information we maintain. Compumedics experienced a data security incident that involved information for patients of certain health care providers* to which we provide services. Compumedics develops diagnostic and research technologies for sleep disorders, which are used by health care providers in sleep study clinics.

On May 13, 2025, we completed our investigation of, and data analysis for, the incident that disrupted the operations of our Information Technology (“IT”) systems. After initially identifying the incident on March 22, 2025, we immediately took steps to secure our systems and contain the incident. We also began an investigation with the assistance of third-party forensic experts and notified law enforcement. The investigation determined that an unauthorized party accessed certain Compumedics systems between February 15, 2025, and March 23, 2025, and reviewed or copied some files.

We then conducted a review and analysis of those files, which determined they contained names, dates of birth, demographic information, medical record numbers, treatment and diagnosis information, dates of treatment, provider names, and sleep study details and results. For a subset of the individuals whose information was involved, the files may have also contained their Social Security numbers and/or health insurance information. We notified the health care providers whose patient information was involved on April 29, 2025.

We encourage the individuals whose information may have been involved to review the statements they receive from their providers and health insurers. If the statements identify services that were not received, the individual should contact the provider or insurer that issued the statement immediately. Individuals whose Social Security numbers may have been involved are encouraged to enroll in the complimentary credit monitoring services we are offering.

We take this incident very seriously and sincerely regret any concern it may cause. To help prevent a similar incident from occurring in the future, we are implementing additional measures to enhance the security of our network and continue training employees concerning data security.

We also established a dedicated, toll-free call center to answer questions about this incident, which can be reached at 877-841-3302, Monday through Friday, between 8:00 a.m. and 8:00 p.m. Central Time.

* BERMUDA SLEEP & SIGNATURE SERVICES / HOPE HEALTHCARE; BRONSON HEALTHCARE GROUP; CHEST MEDICINE ASSOCIATES PA; BILLINGS CLINIC; DAVIS MEDICAL CENTER; NORTHERN LIGHT AR GOULD; NORTHERN LIGHT EASTERN MAINE MEDICAL CENTER; NORTHERN LIGHT SEBASTICOOK VALLEY HOSPITAL; VCU HEALTH SYSTEM AUTHORITY; and VITALCARE FAMILY PRACTICE.