Cardiovascular Medical Group of Southern California (CVMG) 2026 Data Breach
Healthcare / Cardiology / Consumer
Cardiovascular Medical Group of Southern California 2026 Data Breach: Patient PHI Exposed via Sinobi
Los Angeles-area cardiology medical group.
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
94/100
Lower riskHigher risk
High and current: recent, valuable data circulating on the dark web now.
Data Sensitivity i
ElevatedExposed data raises the risk of fraud, targeting, and impersonation. Proactive steps are warranted.
27k rowsRecords
2026Year
The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.
Crucial data exposed
SSNSocial Security Number
PHI / MedicalMedical Diagnosis
Breach Summary
On January 11, 2026 the Sinobi ransomware group claimed a breach of Cardiovascular Medical Group of Southern California, exposing patient PII/PHI including names, medical diagnoses and Social Security numbers.
Full threat analysis, exploitation vectors, and principal guidance below.
10 additional sections · verified field analysis · defensive doctrine
Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…
27k rows records analyzed
About Cardiovascular Medical Group of Southern California (CVMG)
Cardiovascular Medical Group of Southern California (CVMG) is a Los Angeles-area cardiology practice providing cardiovascular diagnosis and treatment.
Why They Hold Your Data
A cardiology practice holds patient identity and contact data, dates of birth, Social Security numbers, health insurance and, in clinical records, diagnoses, test results and treatment history (PHI).
Recent Developments
The Sinobi ransomware group claimed CVMG in January 2026.
Data Points Exposed
3 verified field types
Full Name
Medical Diagnosis Critical
Social Security Number Critical
Breach Impact
As a HIPAA-covered cardiology practice, the breach carries OCR notification, class litigation and patient-trust damage; the Sinobi extortion added public-leak pressure.
Principal Risk Advisory
What this means for a principal
A healthcare-linked breach: exposure ties a named individual to a provider relationship and, where clinical or insurance data is present, to conditions and treatment. For a high-profile principal this is targeting-grade, not merely identity-theft-grade: the combination lets an adversary locate, impersonate, or pressure the principal with little additional work.
What You Should Do
- Freeze credit at all three bureaus and monitor for new-account and tax-refund fraud.
- Watch for medical-benefit fraud and health-themed phishing that references real provider relationships.
- Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.
How ObscureIQ Can Help
- Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
- Exposure mapping: cross-reference the exposed identifiers against broker-available data to size and prioritize the principal's wider footprint.
- ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).
S
Threat Actor: SinobiConfidence: Low
Motivation: Unknown
A low-confidence alias without enough reliable public sourcing for a stable threat actor profile. It may be a misspelling, short-lived alias, or forum handle.
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