BreachCensus

Cierant Corporation

private companyHealthcareUnited States of America

Cierant Corporation is a healthcare organisation in California. It appears on the HHS OCR breach portal, the California Attorney General breach-notification register and the Washington State Attorney General breach-notification register with 2 confirmed incidents (3 filings); the most recent notice was filed on July 7, 2025.

Data as of September 1, 2026.

Sources

Confirmed incident

Filed in CA and WA

The same incident was filed separately with 2 jurisdictions within a few days of each other (CA and WA) — shown here as one incident.

Occurred
December 9, 2024
Disclosed
July 7, 2025

Timeline

  1. July 7, 2025
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
  2. July 7, 2025
    Reported to regulator Regulator

    WA AG breach notification: 530 Washington residents affected

    source
  3. July 7, 2025
    Reported to regulator Regulator

    WA AG breach notification: 902 Washington residents affected

    source
What a California notice means

Required under Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

What a Washington notice means

Required under RCW 19.255.010. Notice to the Attorney General is required when a breach affects more than 500 Washington residents.

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

Washington breach-notification register ↗

Confirmed incident

US-CT — Hacking/IT Incident

Disclosed
July 3, 2025
Records affected
232,506

Was I affected? →

Reported with a business associate involved (HHS portal)

Timeline

  1. July 3, 2025
    Reported to regulator Regulator

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

    source

Litigation

  • Possible litigation — multiple candidate dockets found, not yet resolved to a single case.

Related

Same sector and location

Disclosed around the same time