MICHIGANMalwareHealthcareHealthcareRansomwareBusiness Associate (HIPAA)Customer Data InvolvedData ExfiltratedData EncryptedRansom DemandedIdentity (basic)Government IDHealth (basic)PHIHighContained

MCLAREN HEALTH CARE CORPORATION

bd_43ffe5d7a3b2aced · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Jul 16, 2021

To disclose

—

Affected

64,600

Confidence

68%

Full breach record for MCLAREN HEALTH CARE CORPORATION →3 incidents on file

McLaren Health Care Corporation reported to HHS on 2021-07-16 a Hacking/IT Incident affecting 64600 individuals. Breached information located on Network Server. A business associate experienced a ransomware attack affecting ePHI including names, addresses, DOB, driver's license numbers, SSNs, and clinical information.

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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

Jul 16, 2021

Filed

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

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed64,600 affectedView incident

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: 64,600nationwide
Data types: Identity (basic)Government IDHealth (basic)PHI
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare providerBusiness associate involved
Attack vector: Unauthorized Access
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified HHS

During the incident: Notified HHS
Notified affected individuals
Notified the media
Posted substitute notice on its website
Changes made: Strengthened administrative and technical safeguards to better protect ePHI
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.

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: Jul 16, 2021
Raw hash: 23ad59a2363ff13f0951390713040f6493029e86ee1e6bf5775340740eb0516e

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Reporting entityMCLAREN HEALTH CARE CORPORATION

Victim entityMCLAREN HEALTH CARE CORPORATION

IncidentUnauthorized Access

Stated responseNotified HHS

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing