HackingHealthcareHealthcareSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryPHIIdentity (basic)LowContained

Midwest Spine and Brain Institute

bd_5ff6f124fb6f5ee1 · schema v1 · pii pii-v2

Severity

Low

Discovered

Jun 18, 2026

Filed

Aug 1, 2026

To disclose

—

Affected

Not disclosed

Linked

3 filings

Confidence

66%

Full breach record for Midwest Spine and Brain Institute →

Midwest Spine and Brain Institute (MSBI) notified individuals that an unauthorized actor accessed the network of a third-party vendor on or about November 21, 2024. Following a forensic investigation and manual document review, MSBI determined on June 18, 2026, that the accessed systems contained personal information (full name) and protected health information (PHI). The incident involved a third-party vendor supply chain compromise. MSBI is offering 12 months of complimentary credit monitoring services to affected individuals.

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Incident timeline

undetected · 574 days

Nov 21, 2024

Begins

Jun 18, 2026

Discovered

Aug 1, 2026

Filed

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

New Hampshire State AGbd_101618adc3b7082d2026-08-14 · +13dVerified
HHS OCRbd_b3d6ff59f37577552026-08-14 · +13dCandidate

Name: Midwest Spine and Brain Institute
norm: midwest spine and brain institute

Name: Midwest Spine and Brain Institute
norm: midwest spine and brain institute
Industry: Healthcarellm

Discovered: Jun 18, 2026
Breach occurred: Nov 21, 2024
Undetected for: 574 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)
Attack vector: Third-Party / Supply Chain
Threat actor: External
Third party: via one of MSBI’s third-party vendors
Initial access: supply_chain

During the incident: Consulted with the vendor to ensure they contained the threat and secured their environment
Commenced a prompt and thorough investigation into the incident
Worked closely with external cybersecurity professionals experienced in handling these types of situations
Conducted extensive forensic investigation and complex manual document review
Offering complimentary access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge for 12 months
Changes made: Continually evaluate and modify practices and internal controls to enhance the security and privacy of personal information
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Massachusetts State AGAug 1 · first · this page

New Hampshire State AG+13d

HHS OCR+13d

Pattern: first filing Aug 1 (MA), last Aug 14 (MN) — a 13-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/2026-1367-midwest-spine-and-brain-institute/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 1, 2026
Raw hash: eb7b5cd6f4f9dbba40fc28b0cc67793a8ff8c6cd996f3b429d11cfde85ab6fa1

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMidwest Spine and Brain Institute

Victim entityMidwest Spine and Brain Institute

Incidentdiscovered Jun 18, 2026

Stated responseConsulted with the vendor to ensure they contained the threat and secured their environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov