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Case File: Arch Health Partners, Inc. d/b/a Palomar Health Medical Group Data Breach

This file collects the dated facts on record for the Arch Health Partners, Inc. d/b/a Palomar Health Medical Group incident. The state report is dated October 15, 2025. The incident itself is dated May 5, 2024.

Timeline

528 days separate the incident date from the date it was reported.

  1. May 5, 2024Incident dateWhen the filing says the breach took place.
  2. October 15, 2025Report filed in CaliforniaDate the notice was lodged with the California Attorney General.

Case facts

Filing state
California
Date reported
October 15, 2025
Incident date
May 5, 2024
Receiving office
California Attorney General

Case notes

Arch Health Partners, Inc., also known as Palomar Health Medical Group, formally reported a data breach to regulatory authorities in California. The details submitted indicate an incident where personal information may have been compromised, though the specific nature of the breach and the types of data involved remain unspecified in the public filing.

The breach is reported to have occurred on May 5, 2024, with the company filing its notification on October 15, 2025. At the time of the filing, the incident was described as actively 'investigating,' suggesting ongoing efforts to understand the full scope and impact.

Because the types of information involved were not specified, it is prudent for individuals who receive notification from Palomar Health Medical Group to treat the situation with general caution. Reviewing any communication received from the organization carefully can help in understanding the context of the exposure.

While the exact data is unknown, it is always wise to take general protective measures. Consider monitoring your financial and other personal accounts for unusual activity. Placing a security freeze on your credit reports can also help prevent unauthorized access to new credit lines, and vigilance against phishing attempts or unexpected communications is recommended. These steps are broadly applicable when any personal information may have been exposed.

This information is based on public disclosures made by Arch Health Partners, Inc. d/b/a Palomar Health Medical Group to regulatory bodies. Individuals seeking further clarification or details should refer directly to any official communications they receive from the organization.

Questions about this case file

Where does the Arch Health Partners, Inc. d/b/a Palomar Health Medical Group case file come from?
Every entry is taken from the breach report Arch Health Partners, Inc. d/b/a Palomar Health Medical Group lodged with the California Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?
Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?
It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?
Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

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California data breaches

Filing source: California Attorney General