WISCONSINHackingHealthcareHealthcareSupply Chain (3P Vendor)Customer Data InvolvedData ExfiltratedPHIIdentity (basic)Government IDHealth (basic)CriticalContained

THE MEDICAL COLLEGE OF WISCONSIN, INC.

bd_753d8a044dea7d71 · schema v1 · pii pii-v1

Severity

Critical

Discovered

—

Filed

Nov 14, 2023

To disclose

—

Affected

240,667

Linked

5 filings

Confidence

94%

Full breach record for THE MEDICAL COLLEGE OF WISCONSIN, INC. →7 incidents on file

Medical College of Wisconsin reported to HHS on 2023-11-14 a Hacking/IT Incident affecting 240,667 individuals. A third-party vendor experienced a cybersecurity incident allowing unauthorized access to its network server, compromising PHI including names, addresses, SSNs, dates of birth, claims information, diagnoses, lab results, and medications. The CE notified HHS, affected individuals, and the media, and terminated its relationship with the vendor.

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HIPAA clock✓ HHS notified

⚠ 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

Nov 14, 2023

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

This filing is one of 5 filings about the same incident.View merged incident

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Montana State AGbd_07df4c9699a28e032023-11-14Candidate
Vermont State AGbd_de0fa02547aa70ce2023-11-14Candidate
Massachusetts State AGbd_e2241480b3dee3962023-11-14Verified
New Hampshire State AGbd_297e007c221295502023-11-20 · +6dVerified

Name: THE MEDICAL COLLEGE OF WISCONSIN, INC.
norm: the medical college of wisconsin
Industry: Health Care Services

Name: THE MEDICAL COLLEGE OF WISCONSIN, INC.
norm: the medical college of wisconsin
Industry: Health Care Services
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 240,667nationwide
Data types: PHIIdentity (basic)Government IDHealth (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare provider
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified HHS

During the incident: Notified HHS
Notified affected individuals
Notified the media
Provided credit monitoring services
Changes made: Terminated its business relationship with the vendor
Source: Quoted from the filing itself, not independently verified.

Compliance flags: HHS 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.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Montana State AGNov 14 · first

Vermont State AGNov 14 · first

Massachusetts State AGNov 14 · first

HHS OCRNov 14 · first · this page

New Hampshire State AG+6d

Pattern: first filing Nov 14 (MT), last Nov 20 (NH) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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: Nov 14, 2023
Raw hash: 5930f9fe1e42dbba963855223b485074cfa505de9f8ffa313a271d33b3901ff8

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Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityTHE MEDICAL COLLEGE OF WISCONSIN, INC.

Victim entityTHE MEDICAL COLLEGE OF WISCONSIN, INC.

IncidentThird-Party / Supply Chain

Stated responseNotified HHS

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing