MCBS, LLC

MCBS, LLC submitted a supplemental notification to the New Hampshire Attorney General on July 23, 2026, updating the count of affected New Hampshire residents to 136. The filing references an initial notice sent around June 26, 2026, and states that one additional resident was identified on July 7, 2026. No specific details regarding the nature of the incident, data types, or dates of occurrence are provided in this supplemental letter.

MCBS, LLC, a medical billing services provider, notified South Carolina residents of a cybersecurity incident. Unauthorized access to its network occurred between September 22-26, 2025. The company discovered the breach on September 25, 2025, and confirmed unauthorized acquisition of personal information on May 28, 2026, following a forensic investigation. Affected data includes personal information. MCBS engaged external cybersecurity professionals and is offering complimentary identity protection services.

MCBS, LLC filed a data-breach notice with the Illinois Attorney General in July 2026 (case 26-07-1347). The register records the breach as discovered on September 22, 2025. Personal information types reported: drivers license, financial account number, medical information, ssn. Illinois does not publish the number of people affected — 815 ILCS 530/10 permits the Attorney General to publish only the entity name, the types of personal information and the date range.

MCBS LLC based in Augusta, Georgia, a other entity reported a data breach to the Texas Attorney General. The breach was discovered on 2026-05-28 and reported on 2026-06-30. 13,302 Texas residents were affected. 1,241,154 individuals affected in total. Types of information involved: Name of individual;Address;Social Security Number Information;Medical Information;Health Insurance Information;Date of Birth. Consumers were notified via Notice by publication in print media;Posted at company website or special website;U.S. Mail.

MCBS, LLC notified the New Hampshire Attorney General of a security incident affecting 135 NH residents. Unauthorized access occurred between Sept 22-26, 2025, discovered Sept 25, 2025. Personal and health data (SSN, DOB, medical info) were potentially accessed. MCBS engaged forensic investigators, contained the breach, and offered 12 months of credit monitoring.

MCBS, LLC, a medical billing services provider, notified the California Attorney General of an unauthorized access incident. An unauthorized individual gained access to the network between September 22 and September 26, 2025. MCBS learned of the incident on September 25, 2025, and confirmed data exfiltration on May 28, 2026. Affected data includes PHI, health records, and PII (including SSNs). The company engaged forensic investigators and is offering identity protection services.

MCBS, LLC reported to HHS on 2026-06-26 a Hacking/IT Incident affecting 1,261,464 individuals. Breached information located on Network Server. Business Associate present.

Provides a complete range of management services to healthcare providers