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.

Case file

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 September 4, 2025.

Timeline

September 4, 2025Report filed in IllinoisDate the notice was lodged with the Illinois Attorney General.

Case facts

Filing state: Illinois
Date reported: September 4, 2025
Receiving office: Illinois Attorney General

Case notes

ARCH HEALTH PARTNERS, INC. D/B/A PALOMAR HEALTH MEDICAL GROUP, a healthcare provider managing comprehensive patient care services, filed an official report with the Illinois Attorney General on September 4, 2025. The filing details a data security incident involving unauthorized access to their systems, indicating a potential compromise of personal information.

The nature of the data involved in this specific incident was not detailed in the public filing. However, the report confirms that unauthorized access to ARCH HEALTH PARTNERS, INC. D/B/A PALOMAR HEALTH MEDICAL GROUP systems took place. If you have received a direct notification letter, it means your personal information may have been among the data accessed.

Because the specific types of information compromised were not disclosed in the public record, individuals should be vigilant across various personal accounts. This includes carefully monitoring financial statements and any communications that seem suspicious or out of the ordinary.

It is advisable to remain alert for any unsolicited requests for personal details, especially those received via email, phone, or text. Always verify the authenticity of any communication claiming to be from the organization before sharing sensitive information.

This incident is currently under investigation, with details emerging from official reports submitted to regulators. Receiving a notification letter from Palomar Health Medical Group is a direct indication that your information was potentially involved in this event.

To safeguard your identity and privacy, individuals should promptly review any direct communications from ARCH HEALTH PARTNERS, INC. D/B/A PALOMAR HEALTH MEDICAL GROUP regarding this incident and follow their recommended guidance. Proactive monitoring of personal accounts and financial activities is a generally recommended step following any data security event.

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 Illinois 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.

Illinois data breaches

Named in the ARCH HEALTH PARTNERS, INC. D/B/A PALOMAR HEALTH MEDICAL GROUP breach?

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Timeline

Case facts

Case notes

Questions about this case file

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