HackingHealthcareTechnologyHealthcareStolen CredentialsData ExfiltratedTargetedPIIIdentity (basic)MediumContained

Healthcare Services Group, Inc.

bd_662a2f295d85c266 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 7, 2024

Filed

Aug 25, 2025

To disclose

46 weeks

Affected

3,829state residents only

Linked

16 filings

Confidence

66%

Full breach record for Healthcare Services Group, Inc. →

Healthcare Services Group, Inc. (HSGI) notified Montana residents of unauthorized access to its computer systems between September 27 and October 3, 2024. HSGI discovered the incident on October 7, 2024. The breach potentially exposed names and other personal information. HSGI secured systems, engaged in investigation, notified law enforcement and regulators, and offered credit monitoring services.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 10 days

discovery → filing · 46 weeks / 322 days

Sep 27, 2024

Begins

Oct 7, 2024

Discovered

Aug 25, 2025

Filed

vs. sector median

+34 wks slower

This filing is one of 16 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

New Hampshire State AGbd_2ff23a494fd0eb292025-08-25Verified
Nebraska State AGbd_3d13d9954098db8f2025-08-25Verified
Oregon State AGbd_4999f3b28468b2fa2025-08-25Verified
Washington State AGbd_4e84de9fffe373992025-08-25Verified

Show 6 more filings ↓up to 8d gap

Vermont State AGbd_82a73cadd59014cd2025-08-25Verified
Delaware State AGbd_846def17f6a32ff92025-08-25Verified
Indiana State AGbd_e2af2ec1ac336df22025-08-25Verified
Texas State AGbd_3c672d9cc70092502025-08-26 · +1dVerified
South Carolina State AGbd_7ca401b90e6988952025-08-26 · +1dVerified
Rhode Island State AGbd_dc5f8588b13682f72025-09-02 · +8dVerified

Showing first 10 of 15 linked disclosures.

Name: Healthcare Services Group, Inc.
norm: healthcare services
Domain: hcsgcorp.com

Name: Healthcare Services Group, Inc.
norm: healthcare services
Domain: hcsgcorp.com
Industry: HealthcarellmTechnologyllm

Discovered: Oct 7, 2024
Breach occurred: Sep 27, 2024 – Oct 3, 2024
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 3,829state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: notified relevant state and federal regulators as applicablenotified federal law enforcement
Initial access: valid_credentials

During the incident: Promptly took steps to secure our systems
Began a comprehensive investigation
Notified relevant state and federal regulators as applicable
Notified federal law enforcement
Offering you complimentary access to credit monitoring and identity restoration services through Experian
Changes made: Continue to review and enhance existing policies and procedures relating to data protection and security
Implemented additional security measures to mitigate risk associated with this event and to help prevent similar future incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 46 weeks(322 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

New Hampshire State AGAug 25 · first

Nebraska State AGAug 25 · first

Oregon State AGAug 25 · first

Washington State AGAug 25 · first

Vermont State AGAug 25 · first

Delaware State AGAug 25 · first

Indiana State AGAug 25 · first

Montana State AGAug 25 · first · this page

Texas State AG+1d

South Carolina State AG+1d

Rhode Island State AG+8d

Pattern: first filing Aug 25 (NH), last Sep 2 (RI) — a 8-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 15 — the full spread may be wider.

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://dojmt.gov/wp-content/uploads/2025/09/Consumer-notification-letter-5.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 25, 2025
Raw hash: d47a403902cbc5a3de2c7ab932d682da2fdbd2954de2667c87d698a25738cc35

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityHealthcare Services Group, Inc.

Victim entityHealthcare Services Group, Inc.

Incidentdiscovered Oct 7, 2024

Stated responsePromptly took steps to secure our systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov