OHIOMalwareHealthcareHealthcarePhishingRansomwareBusiness Associate (HIPAA)Customer Data InvolvedData EncryptedHealth (basic)Identity (basic)MediumResolved

Mayfield Clinic Inc

bd_4b5729ab94807e51 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Apr 23, 2016

To disclose

—

Affected

23,341

Confidence

50%

Full breach record for Mayfield Clinic Inc →

An unauthorized person sent a fraudulent email with an attachment that triggered a download of a ransomware virus to 23,341 email addresses held by Mayfield Clinic Inc's business associate (BA) on its behalf. The protected health information (PHI) involved in the breach included email addresses. The company sent an email notification to affected individuals on the day of the incident and sent another email notification two days later. The company provided breach notification to HHS, affected individuals, and the media and also posted substitute notice on its web site. Following the breach, the company assessed system controls, provided anti-scanning updates to its employees’ email, deleted the email addresses it maintained on its BA’s systems, and put a hold on the future electronic distribution of newsletters. OCR obtained written assurances that the company implemented the corrective actions.

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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 23, 2016

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.Confirmed23,341 affectedView incident

Name: Mayfield Clinic Inc
norm: mayfield clinic
Industry: Health Care Services

Name: Mayfield Clinic Inc
norm: mayfield clinic
Industry: Health Care Services
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 23,341nationwide
Data types: Health (basic)Identity (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Email
Covered-entity type: Healthcare provider
Attack vector: Unauthorized Access
Regulator citations: Provided breach notification to HHSOCR obtained written assurances that the CE implemented the corrective actions

During the incident: Sent email notification to affected individuals
Posted substitute notice on its web site
Assessed system controls
Provided anti-scanning updates to employees' email
Deleted email addresses maintained on BA's systems
Put a hold on the future electronic distribution of newsletters
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: Apr 23, 2016
Raw hash: f4713d76a8a1eae10b603207d3ba1e6d66cfc1d326ca559e7b29c9550f27ec52

AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.

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Reporting entityMayfield Clinic Inc

Victim entityMayfield Clinic Inc

IncidentUnauthorized Access

Stated responseSent email notification to affected individuals

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing