Catalyst Physician Group was the subject of a data breach notification filed with the CA Attorney General. The AG filing was recorded on September 11, 2026. The breach or discovery date reported in the filing is December 2, 2025.
Data Exposed
Catalyst Physician Group was the subject of a data breach notification filed with the CA Attorney General. The AG filing was recorded on September 11, 2026. The breach or discovery date reported in the filing is December 2, 2025.
Catalyst Physician Group operates as a prominent outpatient medical network and multi-specialty healthcare provider, delivering comprehensive clinical services, diagnostic testing, and specialized patient care across communities in California. Because modern medical practices rely heavily on electronic health records (EHR) systems, digital prescription platforms, and integrated practice management software, Catalyst Physician Group routinely collects and centralizes vast quantities of highly confidential information. This repository encompasses not only basic contact details and billing information, but also deeply intimate clinical histories, diagnostic imaging reports, treatment notes, and government-issued identification numbers required for medical administration and insurance billing. In 2026, Catalyst Physician Group reported a major data security incident to the California Attorney General, alerting patients and regulatory authorities that unauthorized actors had gained access to their internal digital environment. In the healthcare sector, data breaches typically stem from sophisticated ransomware attacks, unauthorized infiltration of network endpoints, or vulnerabilities within third-party medical vendor systems. Because medical networks maintain complex digital ecosystems bridging clinical staff, third-party laboratories, billing intermediaries, and patient portals, threat actors frequently target these interconnected pathways to harvest valuable electronic protected health information (ePHI) for exploitation on the dark web. Patient records compromised in incidents of this scale typically include full legal names, dates of birth, Social Security numbers, medical record numbers, health insurance policy details, diagnostic summaries, and prescription histories. The exposure of this specific blend of data creates severe, long-term risks for affected individuals. Unlike a compromised credit card, which can be readily canceled and replaced, core medical and identity data cannot be altered. Compromised clinical and diagnostic information opens patients up to targeted medical fraud, wherein criminals utilize stolen identities to obtain healthcare services, bill insurance providers under false pretenses, or alter medical histories. Furthermore, the combination of Social Security numbers and dates of birth exposes victims to relentless risks of financial account takeover, fraudulent loan applications, and comprehensive identity theft. Under federal and state privacy frameworks, including the Health Insurance Portability and Accountability Act (HIPAA), the California Confidentiality of Medical Information Act (CMIA), and the California Consumer Privacy Act (CCPA), medical providers like Catalyst Physician Group have an affirmative, non-delegable legal duty to implement robust administrative, physical, and technical safeguards to protect patient data. These regulations mandate rigorous data encryption, multi-factor authentication, regular vulnerability assessments, and strict access controls. A breach of this magnitude strongly suggests that the organization may have failed to maintain adequate security controls, leaving digital backdoors or unpatched vulnerabilities open to malicious actors. Receiving an official data breach notification letter from Catalyst Physician Group serves as formal legal acknowledgment that your private medical and personal information was compromised due to inadequate data security. Under California law, the receipt of such a notification generally establishes legal standing to participate in a class action lawsuit aimed at holding the negligent organization accountable. Affected individuals do not need to prove that they have already suffered direct financial loss or medical identity theft to pursue legal remedies; the mere exposure of sensitive data constitutes a compensable injury. Our firm is currently investigating potential class action claims on behalf of impacted patients, operating on a strict contingency fee basis—meaning you pay nothing out of pocket unless we successfully recover compensation on your behalf.
Based on the data types reported, affected individuals face:
Your SSN is the master key to your identity. Once exposed, criminals can open new lines of credit, take out loans, or file taxes in your name.
Combined with a name and other leaked data, date of birth helps criminals pass identity verification questions at banks and government agencies.
What the California Consumer Privacy Act (CCPA) and federal statutes entitle you to recover:
The hours spent responding to a data breach — canceling accounts, contacting credit bureaus, updating passwords, and investigating fraud — represent compensable economic harm in data breach litigation.
Once your SSN is exposed, protection becomes an ongoing expense. Plaintiffs in data breach settlements have recovered costs for credit freezes, identity protection subscriptions, and time spent dealing with fraudulent accounts — sometimes covering multiple years of exposure.
HIPAA violations carry civil penalties between $100 and $50,000 per violation. Where a healthcare organization's negligence led to the exposure of protected health information, class members may recover statutory damages in addition to actual losses.
Fees charged to close and reopen accounts, issue replacement cards, or dispute fraudulent transactions are recoverable in data breach litigation. So are the costs of overdrafts, late payments, and credit damage caused by unauthorized activity.
Data breach victims regularly report anxiety, loss of sleep, and ongoing fear of identity theft. These non-economic harms are cognizable injuries in data breach litigation, particularly in cases involving SSN or medical record exposure.
Note: an attorney general breach filing does not by itself establish a settlement fund, a payment amount, or a claim deadline. If an official settlement notice is later issued, rely on that notice for payment details and deadlines.
No. Under California Consumer Privacy Act (CCPA) and federal law, the unauthorized exposure of your personal data — regardless of whether it has been actively misused — can be sufficient grounds for a claim. The breach itself is the injury.
Nothing. The Law Office of David S. Harris handles data breach cases on contingency — you pay zero upfront and owe nothing unless compensation is recovered.
Immediately place a free credit freeze at all three bureaus (Equifax, Experian, TransUnion). A freeze blocks new accounts from being opened in your name. Then file a complaint with the FTC at IdentityTheft.gov and contact our office — SSN exposure is one of the most serious breach types.
If Catalyst Physician Group is a covered healthcare entity or business associate under HIPAA, affected patients have additional rights — including the right to an HHS complaint. These HIPAA violations also strengthen civil damages claims. Consult an attorney to understand your full remedies.
Banks may reverse fraudulent charges, but they are not obligated to compensate you for time lost, stress, or indirect damages. A class action claim against the breached company can recover those additional categories of harm.
State statutes of limitations for data breach claims typically run 2–4 years from the date of the breach or its discovery. Because this breach was recently disclosed, the window is open — but acting early preserves your options and strengthens the case.
Accepting free credit monitoring from Catalyst Physician Group does not waive your right to pursue legal action unless you signed a specific release waiving claims. In most cases, victims who accepted monitoring can still file.
Received a notification letter from Catalyst Physician Group?
What it means and what to do next.
Case review window ends November 6, 2026 — review your letter.
Review Your Letter →Catalyst Physician Group breach?
Free case review · No fee unless you win