DisclosureLens
MalwareHealthcareHealthcareRansomwareCapture Stored DataData EncryptedData ExfiltratedCustomer Data InvolvedPHIHealth (basic)Identity (basic)LowContained

Columbia Medical Practice

bd_356fb379ec1b3880 · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 5, 2025

Filed

Apr 24, 2026

To disclose

24 weeks

Affected

6state residents only

Linked

4 filings

Confidence

65%
Full breach record for Columbia Medical Practice →3 incidents on file

Columbia Medical Practice, a multi-specialty primary healthcare facility in Maryland, experienced a ransomware attack on November 5, 2025. An unknown cyber actor accessed the network, installed malware to lock files, and copied data. The organization engaged cybersecurity specialists, contained the incident, and completed a file review on March 31, 2026. Affected data includes names and health information. The organization is offering complimentary identity monitoring services.

Massachusetts clock✗ MA AG >90d24 weeks discovery → filing

Incident timeline

discovery → filing · 24 weeks / 170 days

Nov 5, 2025

Begins

Nov 5, 2025

Discovered

Apr 24, 2026

Filed

vs. sector median

+12 wks slower

This filing is one of 4 about the same incident.View merged incident
A leak claim by qilin about this victim predates this filing by 170 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
HHS OCRDec 5 · first
Maine State AG+140d
New Hampshire State AG+140d
Massachusetts State AG+140d · this page

Pattern: first filing Dec 5 (MD), last Apr 24 (MA) — a 140-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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.