CALIFORNIAMisuseHealthcareHealthcarePrivilege AbuseCustomer Data InvolvedHealth (basic)Identity (basic)LowResolved

John Muir Health - Walnut Creek Medical Center

bd_386a67908bbde91f · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Apr 13, 2023

To disclose

—

Affected

821

Linked

2 filings

Confidence

97%

Full breach record for John Muir Health - Walnut Creek Medical Center →

John Muir Health – Walnut Creek Medical Center (CA) reported to HHS OCR on 2023-04-13 an Unauthorized Access/Disclosure affecting 821 individuals. A workforce member posted a link to PHI on a publicly accessible website. PHI involved included names, diagnoses, and other treatment information stored on a Network Server. The CE sanctioned the workforce member, implemented additional safeguards, and retrained staff.

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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

Apr 13, 2023

Filed

—

Corroborated · see linked filings

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

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

California State AGbd_98e773795f9aaf6e2023-04-13Verified

Name: John Muir Health - Walnut Creek Medical Center
norm: john muir health walnut creek medical center
Industry: Health Care Services

Name: John Muir Health - Walnut Creek Medical Center
norm: john muir health walnut creek medical center
Industry: Health Care Services
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 821nationwide
Data types: Health (basic)Identity (basic)
HHS breach type: Unauthorized access or disclosure
Where the data lived: Network server
Covered-entity type: Healthcare provider
Attack vector: Unauthorized Access
Threat actor: Internal
Regulator citations: HHS OCR notified
Initial access: insider_action

During the incident: Sanctioned the workforce member involved
Implemented additional administrative, technical, and security safeguards
Staff members retrained to better protect PHI
Notified affected individuals and media
Provided substitute notice
Changes made: Additional administrative, technical, and security safeguards implemented
Staff retraining on PHI protection
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 · 2 filings

View merged incident ↗

California State AGApr 13 · first

HHS OCRApr 13 · 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://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: Apr 13, 2023
Raw hash: 41354d197a3ddb33d33a89cc33f55e2642e1baf8322cd5602864e3f2fe73cb36

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Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityJohn Muir Health - Walnut Creek Medical Center

Victim entityJohn Muir Health - Walnut Creek Medical Center

IncidentUnauthorized Access

Stated responseSanctioned the workforce member involved

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing