ILLINOISHackingHealthcareHealthcarePHIHealth (basic)Identity (basic)Government IDHighContained

UChicago Medicine Medical Group

bd_936e4718fa51638f · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

May 23, 2025

To disclose

—

Affected

38,656

Linked

4 filings

Confidence

69%

Full breach record for UChicago Medicine Medical Group →

UChicago Medicine Medical Group reported to HHS on 2025-05-23 a Hacking/IT Incident affecting 38,656 individuals. Breached information located on Network Server. The incident involved PHI including names, SSNs, addresses, DOBs, claims, diagnoses, and treatment info. The entity provided credit monitoring and implemented additional safeguards.

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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 23, 2025

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

This filing is one of 4 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Massachusetts State AGbd_4662282c408533242025-05-23Verified
Indiana State AGbd_82f8b62638bd67672025-05-23Verified
Illinois State AGbd_6a6c15405a09f7902025-05-01 · +22dVerified by operator

Name: UChicago Medicine Medical Group
norm: uchicago medicine medical
Industry: Health Care Services

Name: UChicago Medicine Medical Group
norm: uchicago medicine medical
Industry: Health Care Services
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 38,656nationwide
Data types: PHIHealth (basic)Identity (basic)Government ID
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare providerBusiness associate involved
Attack vector: Unauthorized Access
MITRE ATT&CK: T1119 Automated Collection
Threat actor: External
Regulator citations: Notified HHS

During the incident: Provided complimentary credit monitoring services to the affected individuals
Implemented additional administrative, technical, and security safeguards to better protect its PHI
Changes made: Implemented additional administrative, technical, and security safeguards to better protect its 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.

Filing propagation · 4 filings · 3 states

View merged incident ↗

Illinois State AGMay 1 · first

Massachusetts State AG+22d

Indiana State AG+22d

HHS OCR+22d · this page

Pattern: first filing May 1 (IL), last May 23 (IL) — a 22-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://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 23, 2025
Raw hash: 1b18930a0bdfcc23a693bcc9a1fe767c10550ec870e967e43b37f15456a4efe9

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Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityUChicago Medicine Medical Group

Victim entityUChicago Medicine Medical Group

IncidentUnauthorized Access

Stated responseProvided complimentary credit monitoring services to the affected individuals

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing