CALIFORNIAHackingHealthcareHealthcarePhishingBusiness Associate (HIPAA)Customer Data InvolvedPHIHealth (basic)Identity (basic)MediumContained

Golden State Radiation Oncology

bd_398ef298f2cf63ee · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Jun 27, 2025

To disclose

—

Affected

2,130

Confidence

69%

Full breach record for Golden State Radiation Oncology →2 incidents on file

Golden State Radiation Oncology reported to HHS on 2025-06-27 a Hacking/IT Incident affecting 2130 individuals. Breached information located on Email. A business associate's employees were subject to an email phishing scheme, exposing clinical and demographic PHI. The entity notified HHS, individuals, and media, 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

Jun 27, 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.Confirmed2,130 affectedView incident

Name: Golden State Radiation Oncology
norm: golden state radiation oncology
Industry: Health Care Services

Name: Golden State Radiation Oncology
norm: golden state radiation oncology
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 2,130nationwide
Data types: PHIHealth (basic)Identity (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Email
Covered-entity type: Healthcare providerBusiness associate involved
Attack vector: Unauthorized Access
MITRE ATT&CK: T1566.002 Spearphishing Link
Threat actor: External
Regulator citations: Notified HHS
Initial access: phishing_link

During the incident: Notified HHS, affected individuals, and the media
Provided complimentary credit monitoring services to the affected individuals
Implemented additional administrative, technical, and security safeguards to better protect PHI
Changes made: Implemented additional administrative, technical, and security 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: Jun 27, 2025
Raw hash: 4f8bf4bb02ef88d0dbd442bbeab86a86ec6be310c589d566e8a37e7378f8c749

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Reporting entityGolden State Radiation Oncology

Victim entityGolden State Radiation Oncology

IncidentUnauthorized Access

Stated responseNotified HHS, affected individuals, and the media

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing