MARYLANDHackingHealthcareHealthcareSupply Chain (3P Vendor)Business Associate (HIPAA)Customer Data InvolvedPHIPIIIdentity (basic)Government IDHealth (basic)CriticalResolved

MedStar St. Mary's Hospital

bd_03b72af862dd9d81 · schema v1 · pii pii-v1

Severity

Critical

Discovered

—

Filed

May 29, 2025

To disclose

—

Affected

172,915

Confidence

95%

Full breach record for MedStar St. Mary's Hospital →

MedStar St. Mary's Hospital (MD) reported to HHS OCR that its business associate experienced a cybersecurity attack affecting PHI of 172,915 individuals. Compromised data included names, addresses, dates of birth, driver's license numbers, Social Security numbers, diagnoses/conditions, lab results, medications, and health insurance information. The breach was reported on 2025-05-29 and involved a network server. Response included HHS, individual, and media notifications, substitute notice, complimentary credit monitoring, and implementation of additional safeguards. The specific business associate is not named in the OCR portal entry.

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HIPAA clock✓ HHS notified

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

May 29, 2025

Filed

—

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed172,915 affectedView incident

Name: MedStar St. Mary's Hospital
norm: medstar st mary s hospital
Industry: Healthcare Provider

Name: MedStar St. Mary's Hospital
norm: medstar st mary s hospital
Industry: Healthcare Provider
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 172,915nationwide
Data types: PHIPIIIdentity (basic)Government IDHealth (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare providerBusiness associate involved
Attack vector: Third-Party / Supply Chain
Threat actor: External
Regulator citations: HHS OCR breach report filed

During the incident: Notified HHS
Notified affected individuals
Notified the media
Provided substitute notice
Provided complimentary credit monitoring services
Changes made: Implemented additional safeguards to better protect PHI
Source: Quoted from the filing itself, not independently verified.

Compliance flags: HHS notified
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
Clock breakdown: Statute Window Elapsed Threshold Status
HIPAA
Discovered: not extracted
→ Notified: not extracted
— regulatory submission HHS notified

Statute	Window	Elapsed	Threshold	Status
HIPAA	Discovered: not extracted → Notified: not extracted	—	regulatory submission	HHS notified

Status: No extraction artifact recorded for this disclosure.

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://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: May 29, 2025
Raw hash: da5f0e09d611168738d4b97787542269766ff587ff0a4d7a420af8f829cf60bf

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Reporting entityMedStar St. Mary's Hospital

Victim entityMedStar St. Mary's Hospital

IncidentThird-Party / Supply Chain

Stated responseNotified HHS

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing