Mainline Health Systems Inc
ent_ed9904fd822aab3ade66d5e4
Disclosures
6
State AG · HHS OCR · 6 jurisdictions
Multi-filing incidents
1
incidents joining 2+ filings here
Max affected reported
101,104
nationwide · State AG TX
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- Mainline Health Systems Inc
- Normalized
- mainline health— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- None on record
Disclosure history (6)newest first
- Texas State AGas victim2025-06-30
Mainline Health Systems Inc based in Monticello, Arkansas, a healthcare – medical provider entity reported a data breach to the Texas Attorney General. The breach was discovered on 2025-05-21 and reported on 2025-06-30. 428 Texas residents were affected. 101,104 individuals affected in total. Types of information involved: Name of individual;Address;Social Security Number Information;Driver’s License number;Government-issued ID number (e.g. passport, state ID card);Financial Information (e.g. account number, credit or debit card number);Medical Information;Health Insurance Information;Date of Birth. Consumers were notified via U.S. Mail.
- New Hampshire State AGas victim2025-06-24
Mainline Health Systems Inc reported an unauthorized access incident occurring on or about April 10, 2024, discovered on May 21, 2025. The breach impacted approximately one New Hampshire resident, exposing PII, PHI, SSNs, financial account data, and medical records. Mainline notified law enforcement, engaged cybersecurity experts, and is offering credit monitoring services. The investigation is ongoing.
- ARKANSASHHS OCRas victim2025-06-23
Mainline Health Systems Inc reported to HHS on 2025-06-23 a Hacking/IT Incident affecting 101,104 individuals. Breached information located on Network Server.
- Massachusetts State AGas victim2025-06-23
Mainline Health Systems Inc reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-06-23. 7 Massachusetts residents were affected.
- Maine State AGas victim2025-06-23
Mainline Health Systems Inc reported an external system breach (hacking) occurring on April 10, 2024, discovered on May 21, 2025. The incident affected 101,104 individuals, including 1 Maine resident. Data types included names and addresses. The company engaged external cybersecurity experts, notified law enforcement, and offered 12 months of credit monitoring services to affected individuals.
- Nebraska State AGas victim2025-06-20
Mainline Health Systems, Inc. reported a security incident occurring on or about April 10, 2024, discovered on May 21, 2025. The breach involved unauthorized access to files containing names and addresses (identity_basic). Mainline notified federal law enforcement, engaged external cybersecurity experts, and conducted a manual review. Notices were sent on June 20, 2025, offering 12 months of credit monitoring and ID theft recovery services. No evidence of identity theft was found.