Case file: Palomar Health
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 9, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Mar 13, 2023
- Discovered
- No discovery date stated in the letters we read
- State and federal records
- 1 filing, Jun 21, 2023
- Residents counted
- No state publishes a resident count for this incident
- Everyone affected
- No filing gives a total
- Information exposed
- Social Security number, Health insurance, Date of birth, Postal address
- Offered to those affected
- 12 months of credit or identity monitoring through Experian
- Third party named
- Yes, the letter attributes the incident to a vendor or service provider
- Prior incidents
- 2 earlier incidents on record for this organization
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| California California AG | Jun 21, 2023 | Not published | 100 days from breach end, statute 30 days | Letter Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Notice timing, state by state
- 100 days from the end of the breach window (Mar 13, 2023, no discovery date in the letter) to the California record (Jun 21, 2023). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82).
The statutes
- California: 30 days to notify residents from discovery or notification of the breach, Cal. Civ. Code § 1798.82. Sample notice to the Attorney General when more than 500 Californians are notified, within 15 days of the consumer notice (effective 2026).
Prior incidents by Palomar Health
| Records | Breach window | Filed with | People |
|---|---|---|---|
| Oct 20, 2017 | Sep 27, 2017 | California | n/a |
| Mar 28, 2014 | Feb 22, 2014 | California | n/a |
Filings more than six months apart are shown as separate incidents.
Filings by others that name Palomar Health
Clients of a breached vendor often file under their own names and name the vendor.
- Palomar Health Medical Group, HHS OCR, May 8, 2026, 501
- Arch Health Partners, Inc. d/b/a Palomar Health Medical Group, California, Oct 15, 2025
Sources and method
Records as published by California AG. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 1 letter read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.