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Latest / California / September 2026

Catalyst Physician Group

Catalyst Physician Group notified California AG on Sep 11, 2026 of a data breach, which occurred on Dec 2, 2025. Data exposed: Medical / health information, Postal address, Name.

All 3 filings by Catalyst Physician Group, state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
Catalyst Physician Group
Source
California AG · source record
Date reported
Sep 11, 2026
Date(s) of breach
Tuesday, December 2, 2025
Residents affected
Not published by this source
Data exposed
Medical / health information Postal address Name
Notice letter
Sample notice (PDF)
Discovered
May 26, 2026, as stated in the letter
"After an extensive forensic investigation and manual document review, on May 26, 2026, Aesto confirmed that between on or about December 2, 2025, and December 18, 2025, a limited amount of your protected health information pertaining to ..."
Days to notice
108 days from discovery (May 26, 2026) to the California record (Sep 11, 2026). Statute: 30 days from discovery or notification of the breach (Cal. Civ. Code § 1798.82). Over the statutory period
Offered in the letter
credit or identity monitoring through Experian
First seen by BreachTally
2026-10-30 15:26 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 15:26 UTC on Oct 30, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Other filings by Catalyst Physician Group

OrganizationSourceStateReportedResidents affectedData exposed
Catalyst Physician Group Texas AG TX Sep 15, 2026 242,121 Social Security numberMedical / health informationDate of birthPostal address+1
Catalyst Physician Group Massachusetts OCABR MA Sep 12, 2026 79 Social Security numberMedical / health information

Data reproduced from a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.