DisclosureLens
UnknownGovernment IDMedium

Prospect Medical Holdings, Inc.

bd_c20d4bad3ff6d87f · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Sep 29, 2023

To disclose

—

Affected

649state residents only

Linked

13 filings

Confidence

95%
Full breach record for Prospect Medical Holdings, Inc. →

Prospect Medical Holdings reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2023-09-29. 649 Massachusetts residents were affected. The report records the breach type as electronic.

Leak gap clock⏱ Leak >30d
⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

Incident timeline — partial

? — ?

Breach window unknown

Sep 29, 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 13 about the same incident.View merged incident
A leak claim by rhysida about this victim predates this filing by 36 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Show 6 more filings ↓up to 154d gap

Showing first 10 of 12 linked disclosures.

Filing propagation · 11 filings · 7 states

View merged incident ↗
Indiana State AGSep 29 · first
HHS OCRSep 29 · first
New Hampshire State AGSep 29 · first
Maine State AGSep 29 · first
Vermont State AGSep 29 · first
California State AGSep 29 · first
Montana State AGSep 29 · first
Massachusetts State AGSep 29 · first · this page
California State AG+75d
New Hampshire State AG+153d
Massachusetts State AG+154d

Pattern: first filing Sep 29 (IN), last Mar 1 (MA) — a 154-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 12 — the full spread may be wider.

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.