Defense Health Agency (TriWest) Data Breach – Investigated by Federman & Sherwood
June 19, 2026 – Federman & Sherwood, a national consumer protection law firm, is investigating the Defense Health Agency (TriWest) data breach, a cybersecurity incident involving unauthorized access to sensitive information that was reported to the U.S. Department of Health and Human Services.
According to the filing, the Defense Health Agency (TriWest) data breach resulted from a hacking/IT incident involving a network server. The breach reportedly affected approximately 11,848 individuals.
Health plans serving military personnel, veterans, and their families maintain substantial amounts of sensitive personal and healthcare information, making cybersecurity incidents particularly concerning.
Federman & Sherwood is actively investigating whether the Defense Health Agency and its service providers implemented reasonable cybersecurity safeguards and whether this data security incident could have been prevented. The firm is also evaluating potential legal claims on behalf of individuals affected by the Defense Health Agency (TriWest) data breach.
Consumers who received a notice regarding the Defense Health Agency (TriWest) data breach or who believe their information may have been compromised are encouraged to monitor healthcare records, financial accounts, and credit reports for suspicious activity.
The potentially compromised information may include:
- Names
- Social Security numbers
- Medical information
- Health insurance information
- Other sensitive information
What is Defense Health Agency (TriWest)?
TriWest Healthcare Alliance (TriWest) acts as the regional administrator for the Defense Health Agency’s (DHA) TRICARE West Region. Under a multibillion-dollar DHA contract, it builds civilian provider networks, processes medical claims, and manages health care enrollment, referrals, and customer service for military families and veterans.
Individuals affected by the Defense Health Agency (TriWest) data breach may have legal rights and are encouraged to contact Federman & Sherwood to learn more about their options.
Phone: 1-800-237-1277 | Email: info@federmanlaw.com