Clustered 8 filings across 7 jurisdictions · filing window Jul 19, 2024 → Sep 16, 2024. View entity profile → Other incidents for this victim →
incident inc_819feaf5da184191 · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
CA MN MT NH OR VT WA
HHS OCR · State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
8 filings across 7 jurisdictions · Jul 19, 2024 – Sep 16, 2024 · 3 milestones
Feb 17, 2024 → Feb 20, 2024
When the intrusion reportedly occurred, per the linked filings
Feb 21, 2024
Reported by VERMONT AG, NEW HAMPSHIRE AG, WASHINGTON AG, CALIFORNIA AG, OREGON AG filings
Mar 13, 2024
Reported by OREGON AG filing
Change Healthcare, Inc. reported to HHS on 2024-07-19 a Hacking/IT Incident affecting 192,700,000 individuals. Breached information located on Network Server. Business Associate present.
Affected (this filing): 192,700,000
Change Healthcare reported a data breach to the Oregon Attorney General. The breach was reported on 2024-09-16. The breach occurred during 2/17/2024 - 2/20/2024. The breach was discovered on 2/21/2024. Notice was sent on 9/16/2024.
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
Change Healthcare disclosed a data breach where a cybercriminal accessed its computer system between Feb 17-20, 2024. The incident involved unauthorized access and exfiltration of data including contact info, health insurance data, health data, billing/payment data, and government IDs. CHC notified law enforcement, engaged a special team, and offered 2 years of free credit monitoring.
Change Healthcare Inc. reported a data breach to the Montana Attorney General. The breach was reported on 2024-08-02. The breach occurred from 2/17/2024 to 2/20/2024. 346,718 Montana residents were affected.
Affected (this filing): 346,718
Change Healthcare Inc. (CHC), a healthcare technology business associate, disclosed a ransomware incident. On Feb 12, 2024, attackers used compromised credentials to access a Citrix portal. Ransomware was deployed on Feb 21, 2024. Data exfiltration occurred Feb 17-20. CHC notified the NH AG on Aug 2, 2024. Impacted data includes PHI and PII. CHC provided credit monitoring and engaged forensic experts.
Change Healthcare Inc. disclosed a data breach where a cybercriminal accessed its computer system without permission between February 17 and February 20, 2024. The unauthorized access was detected on February 21, 2024. The incident involved the exfiltration of protected health information (PHI), including medical records, diagnoses, and treatments, as well as personally identifiable information (PII) such as names, addresses, Social Security numbers, and financial data including payment cards and bank account numbers. Change Healthcare contained the incident by shutting down systems, engaged law enforcement and forensic investigators, and is offering two years of credit monitoring and identity theft protection to affected individuals.
Change Healthcare Inc. reported a data breach to the Oregon Attorney General. The breach was reported on 2024-08-03. The breach occurred during 2/12/2024 - 2/22/2024. The breach was discovered on 3/13/2024. 250 individuals were affected. Notice was sent on 7/29/2024.
Affected (this filing): 250
Change Healthcare Inc., a health sector entity reported a ransomware incident to the Washington Attorney General. The organization became aware of the incident on 2024-02-21 and filed notice on 2024-08-03. 3,121,209 Washington residents were affected. 164 days elapsed between awareness and notification. 4 days to identify the breach. 0 days to contain the breach.
Affected (this filing): 3,121,209