MisuseHealthcareHealthcarePrivilege AbuseEmployee Data InvolvedDelayed DiscoveryPHIHealth (basic)Identity (basic)Government IDMediumResolved

Wentworth-Douglass Hospital

bd_be4cb3b4d8618a18 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 8, 2025

Filed

Oct 23, 2025

To disclose

6 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Wentworth-Douglass Hospital →4 incidents on file

Mass General Brigham (via Wentworth-Douglass Hospital) notified NH AG that a workforce member inappropriately accessed a patient's medical record on April 26, 2023. The incident was discovered on September 8, 2025. Data included PHI, SSN, and PII. One NH resident was notified on October 8, 2025.

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Incident timeline

undetected · 866 days

discovery → filing · 6 weeks / 45 days

Apr 26, 2023

Begins

Sep 8, 2025

Discovered

Oct 23, 2025

Filed

vs. sector median

6 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

Name: MASS GENERAL BRIGHAM INCORPORATED
norm: mass general brigham
Domain: massgeneralbrigham.org

Name: Wentworth-Douglass Hospital
norm: wentworth douglass hospital
Industry: Healthcarellm

Discovered: Sep 8, 2025
Breach occurred: Apr 26, 2023
Undetected for: 866 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 8, 2025
Affected individuals: 1state-resident count only
Data types: PHIHealth (basic)Identity (basic)Government ID
Data elements: Social Security numberDate of birthMedical information
Attack vector: Insider
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: Internal
Initial access: insider_action

During the incident: Offering 24 months of free adult credit monitoring and other services through Experian’s IdentityWorksSM
Changes made: Promote training, education, and accountability of our workforce
Improve the safeguards in place to protect patient information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(45 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

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://mm.nh.gov/files/uploads/doj/remote-docs/mass-general-brigham-20251023.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 23, 2025
Raw hash: c7b25ea2a0b5be3908deabb0c2667555c7d8d0ecd979a824610fa1e2c313ba72

Reporting entityMASS GENERAL BRIGHAM INCORPORATED

Victim entityWentworth-Douglass Hospital

Incidentdiscovered Sep 8, 2025

Stated responseOffering 24 months of free adult credit monitoring and other services through Experian’s IdentityWorksSM

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov