BreachCensus

Washington Gastroenterology

healthcareHealthcareUnited States of America

Washington Gastroenterology is a healthcare organisation in Washington. It appears on the HHS OCR breach portal, the Massachusetts Attorney General breach-notification register, the California Attorney General breach-notification register and the Washington State Attorney General breach-notification register with 3 confirmed incidents; the most recent notice was filed on August 22, 2025.

Data as of October 23, 2026.

Sources

Confirmed incident

US-MA

Disclosed
August 22, 2025
Records affected
583,741

Was I affected? →

Timeline

  1. October 23, 2024
    Press coverage Press

    press report (acknowledged): Hackers gained access to its network on October 23, 2024

    source
  2. January 28, 2025
    Press coverage Press

    press report (press_reported): cybersecurity incident that was identified on January 28, 2025

    source
  3. May 23, 2025
    Press coverage Press

    press report (individuals_notified): The affected employees were notified about the incident on May 23, 2025

    source
  4. August 22, 2025
    Reported to regulator Regulator

    MA AG breach notification: 37 Massachusetts residents affected

    source
  5. August 22, 2025
    Press coverage Press

    press report (individuals_notified): patients were notified on August 22, 2025

    source

Litigation

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

Confirmed incident

Filed in WA and CA — Hacking/IT Incident

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

Occurred
October 23, 2024
Disclosed
May 23, 2025

Timeline

  1. May 23, 2025
    Reported to regulator Regulator

    WA AG breach notification: 556,349 Washington residents affected

    source
  2. August 22, 2025
    Reported to regulator Regulator

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

    source

Litigation

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

Governed by 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 ↗

What a California notice means

Governed by 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 ↗

Confirmed incident

US-WA — Hacking/IT Incident

Disclosed
May 9, 2025
Records affected
501

Was I affected? →

Timeline

  1. May 9, 2025
    Reported to regulator Regulator

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

    source

Related

Same sector and location

Disclosed around the same time