Sierra Management Group
ent_f0a986e2a3cbd997
Disclosures
3
State AG · HHS OCR · Leak Site · 2 jurisdictions
Incidents
1
filings grouped by incident
Max affected reported
1,279
nationwide · HHS OCR CA
Leak-site claims
1
unverified actor claims
Identity resolution
- Canonical name
- Sierra Management Group
- Normalized
- sierra management— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- sierramanagementgroup.com
Disclosure history (3)newest first
- 🐻California State AGas victim2026-06-29
Sierra Management Group notified the California AG of unauthorized access to its systems by a third party between December 2025 and March 2026. The attacker may have accessed and copied files containing personal information, including names. The incident was contained, and an investigation was conducted. Affected individuals are offered credit monitoring and identity restoration services.
- CALIFORNIAHHS OCRas victim2026-06-07
Sierra Management Group reported to HHS on 2026-06-07 a Hacking/IT Incident affecting 1279 individuals. Breached information located on Network Server. Business associate present.
- GLOBALLeak Siteas victim2026-03-07
Provides comprehensive medical practice management