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Kaiser Permanente Data Breach Class Action Lawsuit Investigation

by | Apr 29, 2024 | Class Action

Markovits, Stock & DeMarco, LLC, a law firm experienced in data breach class action litigation, is investigating claims on behalf of victims of a data breach involving data entrusted to Kaiser Permanente that affected 13.4 million people.

Kaiser Permanente, located in California, is one of the largest healthcare providers in the United States.  If you receive a notice of data breach letter from Kaiser Permanente or the Kaiser Foundation Health Plan, Inc. or if you provided personal information on Kaiser Permanentes website, app, and/or patient portal, please contact us as soon as possible to understand your legal rights in response to the data breach please contact us as soon as possible so we can explain your legal rights in response to the data breach.

What Happened?

On March 20, 2024, Kaiser Permanente reported to the Department of Health and Human Services (HHS) Office for Civil Rights (OCR)1 that it tracked and shared its patients’ information with third-party advertisers via previously installed software on its websites and mobile applications.  Kaiser Permanente shared the information with third-party vendors including Google, Microsoft and X (formerly Twitter).  These third parties can then target Kaiser Permanente’s users with ads on social media and other online applications using their personal information.

What Data was Compromised in the Kaiser Foundation Health Plan, Inc. Data Breach?

Kaiser Foundation Health Plan, Inc. disclosed the data breach involves sensitive confidential information, including:

  • Names
  • IP Addresses
  • Information on how members interacted with Kaiser Permanente’s website or mobile applications


What Should I do if I Received Notification of the Data Breach from Kaiser Foundation Health Plan, Inc.?

If you would like to have a free, confidential consultation with an attorney to learn more about your rights and potential legal remedies related to the Kaiser Foundation Health Plan, Inc. data breach, please contact Markovits, Stock & DeMarco, LLC attorney Justin C. Walker at (513) 651-3700, email us at [email protected], or submit a Case Evaluation request through the form below.


1    https://ocrportal.hhs.gov/ocr/breach/breach_report.jsf