Social EngineeringHealthcareHealthcarePhishingCustomer Data InvolvedData ExfiltratedPHIHealth (basic)Identity (basic)LowContained

Jeffrey Lisiecki, MD, PLLC

bd_441670dfaa977680 · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 19, 2026

Filed

May 22, 2026

To disclose

5 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Jeffrey Lisiecki, MD, PLLC →

Jeffrey Lisiecki, MD, PLLC disclosed a phishing incident affecting a single individual's PHI (name, DOB, medical records, photos) accessed between Nov 2024 and Jan 2026. The email account was secured, and HHS OCR was notified. No evidence of fraud was found.

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

Incident timeline

undetected · 534 days

discovery → filing · 5 weeks / 33 days

Nov 1, 2024

Begins

Apr 19, 2026

Discovered

May 22, 2026

Filed

vs. sector median

8 wks faster

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

Name: Jeffrey Lisiecki, MD, PLLC
norm: jeffrey lisiecki md

Name: Jeffrey Lisiecki, MD, PLLC
norm: jeffrey lisiecki md
Industry: Healthcarellm

Discovered: Apr 19, 2026
Breach occurred: Nov 1, 2024 – Jan 31, 2026
Undetected for: 534 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 21, 2026
Affected individuals: 1state-resident count only
Data types: PHIHealth (basic)Identity (basic)
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: Reported the incident to the Department of Health and Human Services, Office for Civil Rights
Initial access: phishing_link

During the incident: Engaged outside cybersecurity professionals to investigate
Secured the email account
Reported the incident to the Department of Health and Human Services, Office for Civil Rights
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/2026-834-jeffrey-lisiecki-md-pllc/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 22, 2026
Raw hash: 849b18dd65b5fdffe1488eb67a873195e948b781c4e383518994ef05a80cb81b

Reporting entityJeffrey Lisiecki, MD, PLLC

Victim entityJeffrey Lisiecki, MD, PLLC

Incidentdiscovered Apr 19, 2026

Stated responseEngaged outside cybersecurity professionals to investigate

ComplianceMA AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov