Catalyst Physician Group Reports Data Breach in California

Catalyst Physician Group submitted a data breach notification to California regulators, confirming a security incident that took place on December 2, 2025. The type of breach was not specified in the public filing, but it involved unauthorized access to their digital environment.

The official report indicates that a range of sensitive patient information was compromised. This includes Full Name, Date of Birth, Social Security Number, Medical Record Number, and Health Insurance ID Number.

Further details from the filing specify that Diagnosis and Treatment Information, Prescription Information, Provider and Treatment Dates, and Billing and Financial Information were also exposed. The presence of these data types means affected individuals face potential risks related to identity and medical information.

Individuals impacted by this breach are advised to monitor their financial and medical statements closely. Reviewing credit reports regularly can help detect any unauthorized accounts or activity, as can checking Explanation of Benefits (EOB) from health insurance providers for unexpected claims.

As a proactive measure, consider placing a fraud alert on your credit files or implementing a credit freeze with the major credit bureaus. This can help prevent new accounts from being opened fraudulently in your name. Remain vigilant for any suspicious communications or activity that may relate to your exposed information.