HackingHealthcareHealthcareStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedDelayed DiscoveryFinancial accountHealth (basic)Identity (basic)Government IDPHIHighContained

American Medical Collection Agency (AMCA)

bd_7826d26cbfc75422 · schema v1 · pii pii-v1

Severity

High

Discovered

May 14, 2019

Filed

Jul 13, 2019

To disclose

9 weeks

Affected

18,330state residents only

Linked

8 filings

Confidence

70%

LabCorp reported a third-party breach involving vendor American Medical Collection Agency (AMCA). Unauthorized access occurred from Aug 1, 2018 to Mar 30, 2019. LabCorp was notified on May 14, 2019. 18,330 Washington residents affected. Data included names, DOB, SSNs, and health info. Notices sent July 13, 2019.

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Leak gap clock✗ Leak >180d9 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 · 286 days

discovery → filing · 9 weeks / 60 days

Aug 1, 2018

Begins

May 14, 2019

Discovered

Jul 13, 2019

Filed

vs. sector median

4 wks faster

This filing is one of 8 about the same incident.View merged incident

Part of Retrieval-Masters Creditors Bureau, Inc supply-chain incident (2019) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

HHS OCRbd_3372e6a02aca0a242019-07-13Verified
Montana State AGbd_eb0456665111f5592019-07-13Verified by operator
South Carolina State AGbd_af36a8d2ef2267392019-07-15 · +2dVerified by operator
California State AGbd_bb71fbf6fb9ef2682019-07-15 · +2dVerified

Show 3 more filings ↓up to 4d gap

New Hampshire State AGbd_0b3589b29539db7b2019-07-16 · +3dVerified
Massachusetts State AGbd_3d616b53be77be772019-07-17 · +4dVerified by operator
Oregon State AGbd_d4aa5c9a608674422019-07-17 · +4dVerified

Name: LABORATORY CORPORATION OF AMERICA HOLDINGS
norm: laboratory corporation of america
Domain: labcorp.com

Name: American Medical Collection Agency (AMCA)
norm: american medical collection agency
Domain: labcorp.com
Industry: Healthcarellm

Discovered: May 14, 2019
Breach occurred: Aug 1, 2018 – Mar 30, 2019
Undetected for: 286 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 13, 2019
Affected individuals: 18,330state-resident count only
Data types: Identity (basic)Government IDHealth (basic)Financial account
Data elements: NameSocial Security numberFinancial account numberDate of birthHealth insurance ID
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 200-299dexposure 200-299d
WA-stated discovery: Found after the fact
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified Washington Office of the Attorney General
Initial access: valid_credentials

During the incident: Stopped sending new collection requests to AMCA
Stopped AMCA from continuing to work on any pending LabCorp collection requests
Provided notice by mail to state residents
Posted substitute notice to its website
Offered free credit monitoring and identity protection services for 24 months
Changes made: Work closely with vendors and business associates to enhance security
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 days from discovery to filing)
Compliance flags: Leak >180d
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 · 8 filings · 8 states

View merged incident ↗

HHS OCRJul 13 · first

Montana State AGJul 13 · first

Washington State AGJul 13 · first · this page

South Carolina State AG+2d

California State AG+2d

New Hampshire State AG+3d

Massachusetts State AG+4d

Oregon State AG+4d

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/BreachM10645.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 13, 2019
Raw hash: 58afc28961e58bb57012737617476c55b6ddb4f78fc14ce4b813d282e1e85992

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityLABORATORY CORPORATION OF AMERICA HOLDINGS

Victim entityAmerican Medical Collection Agency (AMCA)

Incidentdiscovered May 14, 2019

Stated responseStopped sending new collection requests to AMCA

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com