MINNESOTAHackingHealthcareHealthcareCustomer Data InvolvedPHIHealth (basic)Identity (basic)Low

MADISON HEALTHCARE SERVICES

bd_4a64f82dae8647b8 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 2, 2025

To disclose

—

Affected

500

Linked

2 filings

Confidence

68%

Full breach record for MADISON HEALTHCARE SERVICES →

Madison Healthcare Services reported to HHS on 2025-12-02 a Hacking/IT Incident affecting 500 individuals. Breached information located on Network Server.

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Leak gap clock⏱ Leak >90d

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

Dec 2, 2025

Filed

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

This filing is one of 2 about the same incident.View merged incident

A leak claim by worldleaks about this victim predates this filing by 118 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Siteworldleaksbd_e6ab31efa991ef802025-08-06 · +118dCandidate

Name: MADISON HEALTHCARE SERVICES
norm: madison healthcare
Domain: mhsmn.org
Industry: Health Care Services

Name: MADISON HEALTHCARE SERVICES
norm: madison healthcare
Domain: mhsmn.org
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 500nationwide
Data types: PHIHealth (basic)Identity (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare provider
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified HHS OCR

Compliance flags: Leak >90dHHS notified
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
Clock breakdown: Statute Window Elapsed Threshold Status
HIPAA
Discovered: not extracted
→ Notified: not extracted
— regulatory submission HHS notified

Statute	Window	Elapsed	Threshold	Status
HIPAA	Discovered: not extracted → Notified: not extracted	—	regulatory submission	HHS notified

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://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Dec 2, 2025
Raw hash: 08c287006d44d54068e503273cceb99d92a815b58ed1dffe896de781b3ae2961

AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.

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Linked disclosures

Ransomware claims (1)

Reporting entityMADISON HEALTHCARE SERVICES

Victim entityMADISON HEALTHCARE SERVICES

IncidentUnauthorized Access

ComplianceLeak >90d

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing