AccidentalHealthcareHealthcareMisdeliveryEmployee Data InvolvedCustomer Data InvolvedPHIGovernment IDIdentity (basic)MediumResolved

BETH ISRAEL DEACONESS MEDICAL CENTER, INC.

bd_1ed2e7685be90948 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 19, 2025

Filed

Jan 21, 2026

To disclose

5 weeks

Affected

1state residents only

Confidence

65%

Full breach record for BETH ISRAEL DEACONESS MEDICAL CENTER, INC. →24 incidents on file

Beth Israel Deaconess Medical Center (BIDMC) notified a patient that a research study form containing their full Social Security number and protected health information was inadvertently disclosed to another patient on December 19, 2025. The incident was caused by an employee error. BIDMC counseled the employee and offered 24 months of identity monitoring services.

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Massachusetts clock⏱ MA AG >30d5 weeks discovery → filing

Incident timeline

discovery → filing · 5 weeks / 33 days

Dec 19, 2025

Begins

Dec 19, 2025

Discovered

Jan 21, 2026

Filed

vs. sector median

4 wks faster

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

Name: BETH ISRAEL DEACONESS MEDICAL CENTER, INC.
norm: beth israel deaconess medical center

Name: BETH ISRAEL DEACONESS MEDICAL CENTER, INC.
norm: beth israel deaconess medical center
Industry: Healthcarellm

Discovered: Dec 19, 2025
Breach occurred: Dec 19, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 21, 2026
Affected individuals: 1state-resident count only
Data types: PHIGovernment IDIdentity (basic)
Attack vector: Unknown
Threat actor: Internal
Regulator citations: Reporting this incident to the Massachusetts Attorney General

During the incident: Counseled the involved employee on the seriousness of this issue
Offering a complimentary 24-month membership of Experian’s IdentityWorks
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 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/2026-90-beth-israel-deaconess-medical-center/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 21, 2026
Raw hash: 9d8ea7c1c573fc70034f3d8e8c6290393d2b67a0ff1ef212d9d25938900d50c1

Reporting entityBETH ISRAEL DEACONESS MEDICAL CENTER, INC.

Victim entityBETH ISRAEL DEACONESS MEDICAL CENTER, INC.

Incidentdiscovered Dec 19, 2025

Stated responseCounseled the involved employee on the seriousness of this issue

ComplianceMA AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov