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Confirmed breach · 2 breaches on record

Petaluma Health Center data breach

USUnited States

Petaluma Health Center (United States) notified the California Attorney General of a data breach on 20 January 2026.

Breach reported 28 April 2023

Status
Confirmed breach
People affected
482 Oregon residents (one state’s count; the total can be higher)
Reported
28 April 2023
Breach began
7 March 2023
Time to tell
52 days (the median in California’s notices over the last year: 154 days)

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

Before the notice: the ransomware gang Karakurt named Petaluma Health Center on its leak site on 12 April 2023, 16 days before this was reported. Matched by the organisation’s name: the notice itself does not say who the attacker was.

Sources

Official notices are read by code from the regulator’s own register. More notices to Oregon, California. · Corrections and changes

If Petaluma Health Center had your data

  1. Look for Petaluma Health Center’s own notice or letter: it should say what of yours was involved. Keep it.
  2. The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Petaluma Health Center has a password of yours, change it now to be safe.
  3. Expect scams that use your details: calls, texts or emails pretending to be Petaluma Health Center, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.