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MCBS LLC: data breach filings, state by state

MCBS LLC has 4 data breach filings on record in 4 government portals. The latest was reported to Texas AG on Jun 30, 2026, with 13,302 Texas residents. Data exposed, as filed: Social Security number, Medical / health information, Health insurance, Date of birth, Postal address.

13,685residents counted in 2 states (TX, MA). Latest filing per state, last twelve months
1,261,464people in total, as reported to HHS OCR on Jun 26, 2026
4filings in 4 government portals
Jun 30, 2026latest filing, Texas AG

By portal

PortalFilingsLatest reportPeople in the latest filing
Texas AG1Jun 30, 202613,302 Texas residents
California AG1Jun 26, 2026Not published
Massachusetts OCABR1Jun 26, 2026383 Massachusetts residents
HHS OCR1Jun 26, 20261,261,464 in total

Counts are the organization's own, as filed with each agency. Most state portals count their own residents only, so no single state shows the whole incident. An organization can file more than once for the same incident, and for different ones.

Case file

Breach window
Sep 22, 2025 to Sep 26, 2025
Discovered
Sep 25, 2025, as stated in the California letter
Offered to those affected
credit or identity monitoring through Experian (term not stated in the letter we read)
Third party named
No
Days to notice
Past the statutory period in all 2 states that set one, counted from discovery to each state's first record

Open the case fileWord document

Every filing with the agency links, each state's record against its statutory period with the citation, what the letter offers, prior incidents. Letter facts are quoted so you can check them.

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Every filing

OrganizationSourceStateReportedResidents affectedData exposed
MCBS LLC Texas AG TX Jun 30, 2026 13,302 Social Security numberMedical / health informationHealth insuranceDate of birth+2
MCBS, LLC California AG CA Jun 26, 2026 Not published Medical / health information
MCBS, LLC Massachusetts OCABR MA Jun 26, 2026 383 Social Security numberMedical / health information
MCBS, LLC HHS OCR US Jun 26, 2026 1,261,464 Medical / health information

Data reproduced from public government filings. Each row opens the record with the agency link. Spot an error? Email support@breachtally.com with the page link. Corrections are applied and noted.