MCBS LLC Reports Data Breach to Texas Attorney General in 2026

MCBS LLC, a professional medical claims billing service provider, formally reported a data security incident to the Texas Attorney General on June 30, 2026. This public filing confirms that the company experienced a breach involving unauthorized access to its systems.

The incident, which affected the company's data systems, was first identified on September 22, 2025. The nature of the breach and the specific methods used to gain unauthorized access are currently under investigation by MCBS LLC.

Public records do not specify the exact categories of personal information exposed in this breach. However, given MCBS LLC's operations, such systems typically handle extensive personal data used for processing medical claims.

If you have received a formal notification letter directly from MCBS LLC, it indicates that your personal or sensitive health-related information was included in the compromised files. It is crucial to read this letter thoroughly to understand the precise scope of the exposure related to your data.

The notification letter should also detail any identity monitoring services or other protective measures that MCBS LLC may be offering. Review these offers carefully and consider enrolling if you deem it appropriate for your situation.

Regardless of whether specific data types were named in the public filing, it is always recommended to remain vigilant following a data breach. Monitor your financial accounts, credit reports, and other personal information for any unusual or unauthorized activity.