Clustered 2 filings across 2 jurisdictions · filing window Mar 31, 2026 → May 29, 2026. View entity profile → Other incidents for this victim →
incident inc_a5ca397f62944032 · merge_method human · confidence 100%
Gap between first leak claim and first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Materiality delta · SEC filing delay — no SEC 8-K in this cluster; needs two dated filings.
CA
Leak Site · HHS OCR
Earliest sighting first · deep chronology in Litigation Timeline
United Medical Doctors (UMD) is an independent multi‐specialty medical‐surgical group with 70+ Southern California locations and 40+ specialties. They focus on high‐quality, compassionate care, patient satisfaction, process improvement, outpatient surgery, clinical research.
United Medical Doctors reported to HHS on 2026-05-29 a Hacking/IT Incident affecting 501 individuals. Breached information located on Network Server.
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.
Affected (this filing): 501