MICHIGANHackingHealthcareHealthcareBusiness Associate (HIPAA)Customer Data InvolvedPHIHealth (basic)Identity (basic)Government IDCriticalContained

MCLAREN HEALTH CARE CORPORATION

bd_18c5455f0815045b · schema v1 · pii pii-v1

Severity

Critical

Discovered

—

Filed

Oct 20, 2023

To disclose

—

Affected

2,103,881

Linked

10 filings

Confidence

69%

Full breach record for MCLAREN HEALTH CARE CORPORATION →4 incidents on file

McLaren Health Care reported to HHS on 2023-10-20 a Hacking/IT Incident affecting 2,103,881 individuals. Breached information located on Network Server. The cyber-attack compromised PHI including names, addresses, birthdates, SSNs, claims, and treatment information. The entity notified HHS, affected individuals, and the media, and implemented additional administrative and technical safeguards.

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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

Oct 20, 2023

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 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Sitealphvbd_6326acdfc9de458a2023-10-04 · +15dVerified by operator
Leak Sitealphvbd_c4b2c0198b70501e2023-09-29 · +20dVerified

Regulatory filings (7) · sorted by filing gap

California State AGbd_8d2f2b3098afeb792023-11-09 · +20dVerified by operator
Montana State AGbd_bd9b0633195a292f2023-11-09 · +20dVerified by operator
Maine State AGbd_c24689bd6cff46e02023-11-09 · +20dVerified
Massachusetts State AGbd_ddb258a8d643b7952023-11-09 · +20dVerified by operator

Show 3 more filings ↓up to 20d gap

New Hampshire State AGbd_e2978f252f8567182023-11-09 · +20dVerified by operator
Idaho State AGbd_e37f582cfe47b0242023-11-09 · +20dVerified by operator
Vermont State AGbd_ed0fb31e367c93232023-11-09 · +20dVerified by operator

Name: MCLAREN HEALTH CARE CORPORATION
norm: mclaren health care
Domain: mclaren.org
Industry: Health Care Services

Name: MCLAREN HEALTH CARE CORPORATION
norm: mclaren health care
Domain: mclaren.org
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 2,103,881nationwide
Data types: PHIHealth (basic)Identity (basic)Government ID
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare provider
Attack vector: Unauthorized Access
MITRE ATT&CK: T1119 Automated Collection
Threat actor: External
Regulator citations: Notified HHSOCR provided technical assistance to the CE

During the incident: Notified HHS, affected individuals, and the media
Implemented additional administrative and technical safeguards
Changes made: Implemented additional administrative and technical safeguards
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 · 8 filings · 8 states

View merged incident ↗

HHS OCROct 20 · first · this page

California State AG+20d

Montana State AG+20d

Maine State AG+20d

Massachusetts State AG+20d

New Hampshire State AG+20d

Idaho State AG+20d

Vermont State AG+20d

Pattern: first filing Oct 20 (MI), last Nov 9 (VT) — a 20-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: Oct 20, 2023
Raw hash: e256ae3f7e824c053ae43c3f389de1051101b320575bd15427b43d030a438ba6

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 (2)

Regulatory filings (7) · sorted by filing gap

Reporting entityMCLAREN HEALTH CARE CORPORATION

Victim entityMCLAREN HEALTH CARE CORPORATION

IncidentUnauthorized Access

Stated responseNotified HHS, affected individuals, and the media

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing