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September 22, 2025 Verified Sensitive Record Healthcare

MCBS 2025 Data Breach

The MCBS 2025 data breach was an unauthorized-access incident in the network of MCBS, LLC, a billing and practice-management vendor for healthcare organizations, from September 22 through September…

1.3 Million
Reported Records
11
Data Types
Critical
Severity
Yes
Verification

Exposed Data Types

11
Names
Physical addresses
Social security numbers
Dates of birth
Health plan beneficiary numbers
Health insurance policy and subscriber ids
Other health insurance information
Medical histories
Mental or physical conditions
Medical treatment information
Diagnoses

Additional Information

Added DateJuly 27, 2026
Breach DateSeptember 22, 2025
Domainmcbs.com
SourceConfirmed unauthorized network access; files may have been accessed or removed
Last Content UpdateJuly 27, 2026

Verification and editorial method

LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.

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Company Information

Company NameMCBS, LLC
SectorHealthcare
CountryUnited States
Websitemcbs.com

Risk Level

Critical

The reported impact exceeds 1 million and falls within the critical severity band.

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