BASS Medical Group Data Breach Lawsuit Investigation
Received an October 2026 breach notice from BASS Medical Group?
Dapeer Law, P.A. is investigating a potential class action against BASS Medical Group, a medical group based in Walnut Creek, California, on behalf of individuals whose personal and/or protected health information may have been accessed or acquired without authorization in a data security incident BASS Medical Group discovered in September 2026.
Who may qualify
You may be eligible to participate in a class action if any of the following applies:
- You received a data breach notification letter from BASS Medical Group dated October 2026.
- Your notice listed medical treatment codes or billing information, or health insurance information, as information that may have been involved.
- You had personal or protected health information in the possession of BASS Medical Group, the Walnut Creek, California medical group that sent the notice.
- No proof of harm required to consult with counsel. You do not need to have already suffered identity theft to explore your legal options.
- Excluded: individuals who did not receive a breach notice and whose information was not involved in the incident.
Not sure if you qualify?
Send us your notice, we'll confirm your eligibility at no cost.
What happened
On or around September 4, 2026, BASS Medical Group, based in Walnut Creek, California, discovered suspicious activity within its network environment, according to the notice it filed with the California Attorney General. The California Attorney General's breach list gives September 4, 2026 as the date of the breach. The notice states that BASS Medical Group took steps to secure its network and launched an investigation with the assistance of independent cybersecurity experts. On or about September 22, 2026, the investigation determined that certain personal and/or protected health information may have been accessed or acquired without authorization.
The notice, dated October 22, 2026, lists medical treatment codes or billing information and health insurance information as the information that may have been involved, and states that not all information was involved for all individuals. The California filing lists medical treatment codes or billing information and health insurance information. BASS Medical Group states that it currently has no evidence to suggest misuse or attempted misuse of this information. The notice does not offer credit monitoring and does not disclose how many people were affected.
The notice states that BASS Medical Group also notified the FBI and the U.S. Health and Human Services Office for Civil Rights. Whether the medical group's security practices met legal standards for protecting this information is among the issues being evaluated.
What to do if you received a letter
Keep your notice letter
Do not discard it. Your notice describes the information that may have been involved and is important evidence if you decide to participate in a lawsuit.
Review your account and health insurance statements
The notice recommends reviewing your account statements and credit reports closely. Compare statements from your health insurer against the care you actually received and report anything unfamiliar. You can also call the BASS Medical Group call center at 1-855-711-7083, Monday through Friday, 5:00 a.m. to 5:00 p.m. Pacific Time.
Place a fraud alert or credit freeze
Contact Equifax, Experian, and TransUnion to place a fraud alert or freeze on your file. Request a free weekly credit report from AnnualCreditReport.com, and use the FTC's IdentityTheft.gov recovery guide.
Speak with a data breach attorney
Consultations with Dapeer Law are free and confidential. We'll review your notice, explain your options, and advise whether you may be eligible to join a class action.
Submit your notice for a free review
Two minutes online. A licensed attorney reviews every submission.
Breach timeline
Compensation you may be entitled to
Out-of-pocket expenses
Credit freezes, identity restoration services, and other costs incurred responding to the breach.
Time spent monitoring
Hours spent reviewing accounts, disputing fraudulent charges, and dealing with identity theft issues.
Identity theft & fraud losses
Unreimbursed funds stolen from accounts, unauthorized credit lines, or tax refund fraud tied to the breach.
Statutory damages
Certain state data breach and consumer protection statutes provide for fixed damages regardless of actual loss.
Injunctive relief
Court orders requiring BASS Medical Group to implement stronger data security practices to protect the personal and protected health information in its possession going forward.
Compensation categories depend on applicable state law, the types of data exposed, and documented losses. No recovery is guaranteed.
Common questions
I received a data breach letter from BASS Medical Group. What should I do? +
Keep the notice, review your account statements, health insurance statements, and credit reports closely, consider placing a free fraud alert or security freeze with Equifax, Experian, and TransUnion, and contact a data breach attorney for a free consultation. The BASS Medical Group notice does not offer credit monitoring.
Am I eligible to join a class action against BASS Medical Group? +
If you received a data breach notice from BASS Medical Group about the incident discovered in September 2026, you may be eligible for a free case evaluation. Eligibility depends on your state of residence, the categories of your information that were involved, and any losses you have suffered. Dapeer Law will review your notice at no cost.
How much money could I receive from a class action lawsuit? +
Data breach class action recoveries vary significantly. Settlements typically range from a few hundred dollars for basic out-of-pocket losses to several thousand dollars for documented identity theft, with class size, damages, and negotiation all affecting the final amount. No payout is guaranteed, and this investigation has not yet resulted in a settlement.
What personal information was exposed in the breach? +
The notice BASS Medical Group filed with the California Attorney General states that medical treatment codes or billing information and health insurance information may have been involved, and that not all information was involved for all individuals. The notice describes the incident as involving personal and/or protected health information. Check your individual letter for the categories that apply to you.
Did BASS Medical Group offer free credit monitoring? +
The notice filed with the California Attorney General does not offer credit monitoring or identity protection services. It recommends reviewing account statements and credit reports and explains how to place a free fraud alert or security freeze with Equifax, Experian, and TransUnion. If your individual letter includes a monitoring offer, enrolling does not waive your right to pursue a claim.
How many people were affected by the BASS Medical Group breach? +
BASS Medical Group has not publicly disclosed how many people were affected, and the California Attorney General filing does not list a count. This page will be updated as additional information becomes available.
Is there a deadline to take legal action? +
Yes. Statutes of limitations for data breach claims vary by state and legal theory, typically ranging from one to six years. Waiting can permanently bar your claim. Contact us as soon as possible for a free evaluation.
How do I get a copy of the official breach notice? +
The notice BASS Medical Group filed with the California Attorney General is available through the California AG's data security breach portal (linked in Sources below). If you received a letter but no longer have it, Dapeer Law can help you obtain a copy during your free consultation. You can also call the BASS Medical Group call center at 1-855-711-7083.
Sources & references
- Official breach notice filing · California Attorney General, BASS Medical Group Notice of Data Security Incident
- Credit bureau freezes · Equifax · Experian · TransUnion
- Free weekly credit reports · AnnualCreditReport.com
- Identity theft recovery guide · FTC IdentityTheft.gov
Don't let the deadline decide for you. Submit your claim today.
You only have a limited window to act. Our team will review your notice, explain your options, and tell you whether you may be eligible to recover compensation, at no cost to you.
