MisuseHealthcareHealthcarePrivilege AbuseEmployee Data InvolvedCustomer Data InvolvedDelayed DiscoveryPHIIdentity (basic)Government IDHealth (basic)MediumContained

THE BRIGHAM AND WOMEN'S HOSPITAL, INC.

bd_814bdde52bf13655 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 18, 2025

Filed

Feb 27, 2026

To disclose

10 weeks

Affected

Not disclosed

Confidence

65%

Full breach record for THE BRIGHAM AND WOMEN'S HOSPITAL, INC. →74 incidents on file

Brigham and Women's Hospital notified Massachusetts residents that a workforce member accessed patient records without a work-related reason between December 10, 2024, and December 18, 2025. The incident involved Protected Health Information (PHI), including names, dates of birth, addresses, phone numbers, social security numbers, diagnoses, medications, and visit information. The hospital investigated the incident, implemented preventive measures, and is offering 24 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Massachusetts clock⏱ MA AG >30d10 weeks discovery → filing

Incident timeline

undetected · 373 days

discovery → filing · 10 weeks / 71 days

Dec 10, 2024

Begins

Dec 18, 2025

Discovered

Feb 27, 2026

Filed

vs. sector median

1 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: THE BRIGHAM AND WOMEN'S HOSPITAL, INC.
norm: the brigham and women s hospital

Name: THE BRIGHAM AND WOMEN'S HOSPITAL, INC.
norm: the brigham and women s hospital
Industry: Healthcarellm

Discovered: Dec 18, 2025
Breach occurred: Dec 10, 2024 – Dec 18, 2025
Undetected for: 373 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 18, 2026
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Government IDHealth (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Insider
Threat actor: Internal
Initial access: insider_action

During the incident: Investigated the matter
Implemented measures to prevent similar incidents in the future
Strengthened safeguards
Promoted training, education, and accountability across our workforce
Provided 24 months of free credit monitoring and other services through Experian’s IdentityWorks
Changes made: Strengthened safeguards
Promoted training, education, and accountability across our workforce
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(71 days from discovery to filing)
Compliance flags: MA AG >30d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.mass.gov/doc/2026-299-brigham-and-womens-hospital/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 27, 2026
Raw hash: 868b3669cbbbab11ba81c1cdc951028367a0f270b0f81436c7be03f7af758d7a

Reporting entityTHE BRIGHAM AND WOMEN'S HOSPITAL, INC.

Victim entityTHE BRIGHAM AND WOMEN'S HOSPITAL, INC.

Incidentdiscovered Dec 18, 2025

Stated responseInvestigated the matter

ComplianceMA AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov