UnknownHealthcareHealthcareGovernment IDHealth (basic)Medium

Sierra Vista Hospital & Clinics

bd_316f34b8c14802c1 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Oct 7, 2025

To disclose

—

Affected

7state residents only

Linked

6 filings

Confidence

95%

Full breach record for Sierra Vista Hospital & Clinics →

Sierra Vista Hospital & Clinics reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-10-07. 7 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

Oct 7, 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 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Texas State AGbd_98e33e96be702bb62025-10-07Verified
Montana State AGbd_1f24d3d9561cf6f32025-10-08 · +1dVerified
HHS OCRbd_c1f6fbbed29347c22025-10-06 · +1dVerified
New Hampshire State AGbd_46d90a4b9876e76f2025-10-10 · +3dVerified

Show 1 more filing ↓up to 6d gap

Illinois State AGbd_f8afe2f84d5db6b52025-10-01 · +6dCandidate

Name: Sierra Vista Hospital & Clinics
norm: sierra vista hospital clinics

Name: Sierra Vista Hospital & Clinics
norm: sierra vista hospital clinics
Industry: Healthcareregulator portal

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 7state-resident count only
Data types: Government IDHealth (basic)
Data elements: Social Security numberMedical information
Stated not affected: Financial 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 · 6 filings · 6 states

View merged incident ↗

Illinois State AGOct 1 · first

HHS OCR+5d

Texas State AG+6d

Massachusetts State AG+6d · this page

Montana State AG+7d

New Hampshire State AG+9d

Pattern: first filing Oct 1 (IL), last Oct 10 (NH) — a 9-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-2025/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 7, 2025
Raw hash: 50f251e5333b32414aa70cfdd9f964ddf402e042b3dd67eb534c7a2406e6c853

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entitySierra Vista Hospital & Clinics

Victim entitySierra Vista Hospital & Clinics

IncidentUnknown

ComplianceMA credit monitoring due

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov