UnknownHealthcareHealthcareGovernment IDMedium

GROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN

bd_009d2e599b94c638 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 8, 2024

To disclose

—

Affected

931state residents only

Linked

4 filings

Confidence

95%

Full breach record for GROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN →

Group Health Cooperative of South reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2024-04-08. 931 Massachusetts residents were affected.

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Massachusetts clock✓ MA credit monitoring due

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

Incident timeline — partial

? — ?

Breach window unknown

Apr 8, 2024

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 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

HHS OCRbd_453e14285276c3d32024-04-08Verified by operator
Maine State AGbd_7d9f6fe2b75d08b82024-04-08Candidate
Wisconsin State AGbd_f89f7efae99505a42024-02-09 · +59dVerified by operator

Name: GROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN
norm: group health cooperative of south central wisconsin

Name: GROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN
norm: group health cooperative of south central wisconsin
Industry: Healthcareregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 931state-resident count only
Data types: Government ID
Data elements: Social Security number
Stated not affected: Medical informationFinancial account numberDriver's licence numberPayment card number
The filing states these were not involved. Categories absent from both lists were not addressed either way.
Attack vector: Unknown

Compliance flags: MA credit monitoring due
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 3 states

View merged incident ↗

Wisconsin State AGFeb 9 · first

HHS OCR+59d

Maine State AG+59d

Massachusetts State AG+59d · this page

Pattern: first filing Feb 9 (WI), last Apr 8 (MA) — a 59-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://www.mass.gov/doc/data-breach-report-2024/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 8, 2024
Raw hash: cce1ba4076b3ce2f9b486acee849dd23657fca5fcfb726131a48dfac2155b166

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityGROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN

Victim entityGROUP HEALTH COOPERATIVE OF SOUTH CENTRAL WISCONSIN

IncidentUnknown

ComplianceMA credit monitoring due

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov