Medical Computer Business Services
Disclosed Jul 28, 20268 weeks ago1,261,464 affectedConfirmed
Medical billing firm MCBS says 2025 ransomware breach hit 1,261,464 people
Georgia medical billing company MCBS disclosed that a September 2025 network breach exposed names, SSNs, insurance IDs and medical histories of 1,261,464 people. The PEAR ransomware group claimed 3.3 TB.
What is known
| People affected | 1,261,464 (as reported by the organization) |
|---|---|
| Disclosed | Jul 28, 2026 |
| Attack | Ransomware |
| Data exposed | Names, Addresses, Social Security numbers, Dates of birth, Insurance, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Data breach at medical billing firm MCBS affects 1.26 million peoplebleepingcomputer.com · News | News |
| MCBS data breach noticemcbs.com · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Researchtotal | Jul 28 | 1,261,464 |
History of this record
- 2026-09-25 · added · seed source
First seen 2026-09-25 (Research), confirmed by Research. Record counts are as reported. Not legal advice.