Sierra Vista Hospital & Clinics
ent_089c93d4dd4045506446a198
Disclosures
6
State AG · HHS OCR · 6 jurisdictions
Multi-filing incidents
1
incidents joining 2+ filings here
Max affected reported
75,054
nationwide · State AG TX
Leak-site claims
0
none in sample
Identity resolution
- Canonical name
- Sierra Vista Hospital & Clinics
- Normalized
- sierra vista hospital clinics— dedupe via name-norm; Microsoft / MSFT collapse to one row
- GLEIF LEI
- No match
- SEC EDGAR CIK
- None — not an SEC registrant
- Domain
- None on record
Disclosure history (6)newest first
- New Hampshire State AGas victim2025-10-10
Sierra Vista Hospital & Clinics notified the NH AG of unauthorized network access occurring Jan 14-31, 2025, detected Jan 29, 2025. PHI and SSNs of 4 NH residents were potentially exposed. Notification sent Oct 6, 2025, including credit monitoring.
- Montana State AGas victim2025-10-08
Sierra Vista Hospital & Clinics notified Montana residents of a cybersecurity incident detected on January 29, 2025. Unauthorized access occurred between Jan 14-31, 2025, potentially exposing PII and PHI. The organization secured its network, engaged external forensic experts, and is offering complimentary credit monitoring via Experian.
- Massachusetts State AGas victim2025-10-07
Sierra Vista Hospital & Clinics reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2025-10-07. 7 Massachusetts residents were affected.
- Texas State AGas victim2025-10-07
Sierra Vista Hospital & Clinics based in Truth or Consequences, New Mexico, a healthcare – medical provider entity reported a data breach to the Texas Attorney General. The breach was discovered on 2025-08-13 and reported on 2025-10-07. 481 Texas residents were affected. 75,054 individuals affected in total. Types of information involved: Name of individual;Address;Social Security Number Information;Medical Information;Health Insurance Information;Date of Birth. Consumers were notified via U.S. Mail.
- NEW MEXICOHHS OCRas victim2025-10-06
Sierra Vista Hospital & Clinics reported to HHS on 2025-10-06 a Hacking/IT Incident affecting 75054 individuals. Breached information located on Network Server.
- Illinois State AGas victim2025-10-01
SIERRA VISTA HOSPITAL & CLINICS filed a data-breach notice with the Illinois Attorney General in October 2025 (case 25-10-500). The register records the breach as discovered on August 13, 2025. Personal information types reported: medical information, ssn. Illinois does not publish the number of people affected — 815 ILCS 530/10 permits the Attorney General to publish only the entity name, the types of personal information and the date range.