CALIFORNIAHackingHealthcareHealthcareCustomer Data InvolvedPHIHealth (basic)Identity (basic)Medium

Stockton Cardiology Medical Group

bd_becbed37d28097b0 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Mar 18, 2026

To disclose

—

Affected

90,000

Linked

3 filings

Confidence

69%

Full breach record for Stockton Cardiology Medical Group →

Stockton Cardiology Medical Group reported to HHS on 2026-03-18 a Hacking/IT Incident affecting 90,000 individuals. Breached information located on Network Server.

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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

Mar 18, 2026

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 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitegenesisbd_b4d948ee8b0c7a7d2026-02-17 · +29dVerified

Regulatory filings (1) · sorted by filing gap

California State AGbd_c894ddefa9738b822026-03-20 · +2dVerified

Name: Stockton Cardiology Medical Group
norm: stockton cardiology medical
Domain: stocktoncardiology.com
Industry: Health Care Services

Name: Stockton Cardiology Medical Group
norm: stockton cardiology medical
Domain: stocktoncardiology.com
Industry: Health Care Services
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 90,000nationwide
Data types: PHIHealth (basic)Identity (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Network server
Covered-entity type: Healthcare provider
Attack vector: Unauthorized Access
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified HHS OCR

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 ↗

HHS OCRMar 18 · first · this page

California State AG+2d

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: Mar 18, 2026
Raw hash: 28b8f033a88d53d53ac4610f9dda20d35819ce410f491b23e6f5c4f001377f5d

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.

text/html990 B

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Linked disclosures

Ransomware claims (1)

Regulatory filings (1) · sorted by filing gap

Reporting entityStockton Cardiology Medical Group

Victim entityStockton Cardiology Medical Group

IncidentUnauthorized Access

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing