BreachCensus

Sierra Vista Hospital & Clinics

healthcareHealthcareUnited States of America

Sierra Vista Hospital & Clinics is a healthcare organisation in Texas. It appears on the HHS OCR breach portal, the Massachusetts Attorney General breach-notification register and the Texas Attorney General breach-notification register with 1 confirmed incident (2 filings); the most recent notice was filed on October 7, 2025.

Data as of September 12, 2026.

Sources

Confirmed incident

Filed in TX, MA and NM — Hacking/IT Incident

The same incident was filed separately with 3 jurisdictions within a few days of each other (TX, MA and NM) — shown here as one incident.

Occurred
January 14, 2025
Disclosed
October 7, 2025
Records affected
75,054

Was I affected? →

Timeline

  1. October 6, 2025
    Reported to regulator Regulator

    HHS OCR breach portal listing: Hacking/IT Incident; Network Server

    source
  2. October 7, 2025
    Reported to regulator Regulator

    MA AG breach notification: 7 Massachusetts residents affected

    source
  3. October 7, 2025
    Reported to regulator Regulator

    TX AG breach notification: 481 Texas residents affected

    source
What a Texas notice means

Governed by Tex. Bus. & Com. Code §521.053. Notice to the Attorney General is required when a breach affects at least 250 Texas residents.

Note: the published count is a total, not limited to Texas residents.

Texas breach-notification register ↗

What a Massachusetts notice means

Governed by M.G.L. c. 93H. Notice to the Attorney General is required for a breach affecting any number of Massachusetts residents' personal information -- the statute sets no minimum count.

Note: the count is Massachusetts residents only, not a total.

Massachusetts breach-notification register ↗

Related

Disclosed around the same time