United Medical Doctors
bd_83c2690ae30c972d · schema v1 · pii pii-v1
Full breach record for United Medical Doctors →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Insomnia on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Source: Ransomware.live
Post text · scraped from the leak site
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.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Mar 31, 2026
Claim posted
—
Corroborated · see linked filings
This record's own dates cannot anchor compliance clocks; see the linked filings.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Regulatory filings (1) · sorted by filing gap
- HHS OCRbd_a15109124a409b032026-05-29 · +59dVerified
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
insomnia
According to ransomware.live, Insomnia is a data-theft and extortion group that emerged in October 2025, targeting primarily US-based healthcare organizations — stealing patient files and threatening public exposure rather than encrypting files — and avoiding former Soviet states, consistent with Russian-speaking cybercrime norms.