Social EngineeringHealthcareHealthcarePhishingStolen CredentialsTargetedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)PHIHighContained

Gastro Health Holdco, LLC

bd_fa70a8cc2319eb4e · schema v1 · pii pii-v1

Severity

High

Discovered

Feb 25, 2026

Filed

May 22, 2026

To disclose

12 weeks

Affected

1,813state residents only

Linked

6 filings

Confidence

70%

Full breach record for Gastro Health Holdco, LLC →

Gastro Health reported a phishing incident on Feb 25, 2026, resulting in unauthorized access to patient files. Data exposed included names, SSNs, DOBs, state IDs, and PHI. 1,813 Washington residents affected. Incident contained; credit monitoring offered.

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Washington clock⏱ WA AG >30d12 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 1 days

discovery → filing · 12 weeks / 86 days

Feb 24, 2026

Begins

Feb 25, 2026

Discovered

May 22, 2026

Filed

vs. sector median

+3 wks slower

This filing is one of 6 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_47955d57ccbe42f72026-05-22Verified
HHS OCRbd_b3e6b30ae05db95f2026-05-22Verified
HHS OCRbd_c5c7efc4ddd11f452026-05-22Verified
New Hampshire State AGbd_d2f4d6ae220719582026-05-22Verified

Show 1 more filing ↓

Massachusetts State AGbd_f89b870182b31cd22026-05-22Candidate

Name: Gastro Health Holdco, LLC
norm: gastro health holdco

Name: Gastro Health Holdco, LLC
norm: gastro health holdco
Industry: Healthcarellm

Discovered: Feb 25, 2026
Breach occurred: Feb 24, 2026 – Feb 25, 2026
Undetected for: 1 dayoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 1,813state-resident count only
Data types: Identity (basic)Government IDHealth (basic)PHI
Data elements: NameSocial Security numberDriver's licence numberDate of birthHealth insurance IDMedical informationProtected health information
WA-stated cause: Unauthorized Access
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoingContained same day
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Took immediate action to contain the incident
Investigated its scope and impact
Conducted a detailed review of the affected files
Providing access to 24 months of Epiq Privacy Solutions ID at no cost
Changes made: Continuing to monitor systems
Looking for ways to further enhance information security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 12 weeks(86 days from discovery to filing)
Compliance flags: WA AG >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 5 states

View merged incident ↗

Indiana State AGMay 22 · first

HHS OCRMay 22 · first

New Hampshire State AGMay 22 · first

Massachusetts State AGMay 22 · first

Washington State AGMay 22 · first · this page

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA41006.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 22, 2026
Raw hash: 2bcdaa19330e1b869de4066174a234905354e70ed4fc7f236374eac74b6c8391

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityGastro Health Holdco, LLC

Victim entityGastro Health Holdco, LLC

Incidentdiscovered Feb 25, 2026

Stated responseTook immediate action to contain the incident

ComplianceWA AG >30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com