The Catalyst Physician Group data breach: your legal rights
Catalyst Physician Group confirmed a data breach in California, exposing sensitive patient information like Social Security Numbers and medical records. This incident suggests potential security failures, creating significant long-term risks for affected individuals and forming a basis for legal action.
Get a free case reviewYour rights after this breach
To be told about the breach
California law requires a company that loses residents' personal information to notify them. Catalyst Physician Group reported this breach to the California Attorney General.
California data breach notification law
To sue under California privacy law
If certain personal information was exposed because a company failed to keep reasonable security, California residents may bring a claim for damages set by statute, even without proof of a financial loss.
California Consumer Privacy Act, Cal. Civ. Code § 1798.150
To file a health privacy complaint
Medical or insurance information is listed. You can file a complaint with the U.S. Department of Health and Human Services. That law does not let you sue directly, but state-law claims may still be possible.
HIPAA (complaints to HHS Office for Civil Rights)
Limits on what you owe for fraud
Account or card information is listed. Report unauthorized charges quickly; federal law caps how much you can be held responsible for, and the sooner you report, the lower the cap.
Electronic Fund Transfer Act and Fair Credit Billing Act
To ask whether you can recover money
If Catalyst Physician Group did not take reasonable care of your information, you may have a claim for negligence or under California law. An attorney can review it with you for free.
California common law and consumer protection statutes
Free case review
Tell us you got the Catalyst Physician Group notice. An attorney reviews it and tells you plainly whether you may have a claim.
- Free, no obligation
- No fee unless you recover
- Reply within 24 hours
What Catalyst Physician Group reported
- Reported to
- California Attorney General
- Date filed
- September 11, 2026
- People notified
- Not stated
- Cause in filing
- Not stated
Information listed in the filing: Full Name, Date of Birth, Social Security Number, Medical Record Number, Health Insurance ID Number, Diagnosis and Treatment Information, Prescription Information, Provider and Treatment Dates, Billing and Financial Information.
Catalyst Physician Group, an outpatient medical network operating in California, recently confirmed a data breach affecting its internal digital environment. The incident occurred on December 2, 2025, with the company reporting it to state authorities on September 11, 2026. This security lapse involved unauthorized access to the systems that manage extensive patient health records. The California Attorney General's office is currently monitoring the ongoing investigation into this significant data event.
The compromised data includes a broad range of highly sensitive personal and medical information. Individuals who received a breach notification may have had their Full Name, Date of Birth, Social Security Number, Medical Record Number, Health Insurance ID Number, Diagnosis and Treatment Information, Prescription Information, Provider and Treatment Dates, and Billing and Financial Information exposed. Unlike a compromised credit card, this core identity and health data cannot be changed, presenting ongoing, long-term risks to those affected.
Receiving a data breach notification means your personal health information is at risk. Federal laws like the Health Insurance Portability and Accountability Act (HIPAA), alongside California-specific statutes such as the Confidentiality of Medical Information Act (CMIA) and the California Consumer Privacy Act (CCPA), impose strict legal duties on healthcare providers like Catalyst Physician Group to safeguard patient data. These regulations require robust security measures, and a breach of this magnitude suggests these safeguards may have been inadequate.
For individuals affected by this breach, your primary step should be to carefully review the notification letter from Catalyst Physician Group and immediately begin monitoring your accounts for any suspicious activity. Beyond vigilance, you also have specific legal rights to seek accountability from the company. Under California law, the mere exposure of sensitive personal and medical data can constitute a compensable injury, potentially allowing you to join a class action lawsuit without needing to prove immediate financial losses.
Our firm is actively investigating potential claims related to the Catalyst Physician Group data breach. We are prepared to help you understand your legal options and pursue compensation for the risks and harm caused by this incident. Contact us for a free, confidential case review to discuss how this breach may affect your legal rights and what steps you can take.
See the official filingCatalyst Physician Group data breach questions
- How many people were affected by the Catalyst Physician Group data breach, and what was exposed?
- The filing does not give a count of affected people and lists the following information as involved: Full Name, Date of Birth, Social Security Number, Medical Record Number, Health Insurance ID Number, Diagnosis and Treatment Information, Prescription Information, Provider and Treatment Dates, Billing and Financial Information. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
- Is the Catalyst Physician Group data breach letter legit or a scam?
- A notice from Catalyst Physician Group in the mail matches the breach Catalyst Physician Group reported to the California Attorney General on September 11, 2026. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Catalyst Physician Group through a phone number or website you find yourself.
- Did Catalyst Physician Group offer free credit monitoring?
- Any free monitoring Catalyst Physician Group is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Enrolling does not give up your right to bring a claim.
- Is there a Catalyst Physician Group data breach class action lawsuit?
- Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Catalyst Physician Group. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
- What should I do after getting the Catalyst Physician Group data breach notice?
- Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
- Where can I see the official Catalyst Physician Group breach notice?
- Catalyst Physician Group's report is published by the California Attorney General: https://oag.ca.gov/privacy/databreach/reporting Compare it with the letter you received to confirm the dates and details match.
- Do I need a Catalyst Physician Group data breach lawyer or attorney?
- An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.
- Can I sue Catalyst Physician Group over the data breach?
- It depends on what was exposed, the law in California and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
- How much could a Catalyst Physician Group data breach settlement or claim be worth?
- There is no set amount, and no Catalyst Physician Group settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. The filing lists Full Name, Date of Birth, Social Security Number as involved. Keep receipts and records; they're what damages claims are built on.
Other breaches reported in California
- ZZ Diag ProbeCalifornia Attorney General · Filed date pendingCount not stated
- STS Aviation GroupCalifornia Attorney General · Filed October 19, 2026Count not stated
- Citizens BankCalifornia Attorney General · Filed October 19, 2026Count not stated
- John G. Yphantides, a Professional Law CorporationCA Attorney General · Filed October 16, 2026Count not stated
- Neuro Wellness SpaCalifornia Attorney General · Filed October 16, 2026Count not stated
- Frazer LLPCalifornia Attorney General · Filed October 16, 2026Count not stated
Attorney advertising. General information, not legal advice for your situation. This page reflects a public regulator filing; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.