Cornerstone Care Center Data Breach Lawsuit Investigation
Received a May 2026 breach notice from Cornerstone Care Center?
Dapeer Law, P.A. is investigating a potential class action against Sanger Skilled Care, LLC d/b/a Cornerstone Care Center, a Sanger, California skilled nursing facility, on behalf of patients whose protected health information may have been exposed in an April 2026 unauthorized account access incident.
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 Cornerstone Care Center dated May 2026.
- Your letter offered enrollment in 12 months of free Cyberscout credit monitoring (a TransUnion company).
- You had personal information or protected health information held by Cornerstone Care Center in its capacity as a skilled nursing facility.
- 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 April 7, 2026, Sanger Skilled Care, LLC d/b/a Cornerstone Care Center ("Cornerstone Care Center"), a skilled nursing facility headquartered at 2550 9th Street in Sanger, California, became aware of unauthorized activity involving one user account. According to the sample notice filed with the California Attorney General, the facility immediately took steps to contain the incident and engaged a third-party forensic firm to investigate.
On April 16, 2026, the forensic investigation determined that a limited amount of protected health information (PHI) maintained in the ordinary course of business may have been accessed by an unauthorized third party. Cornerstone Care Center began mailing notification letters on May 7, 2026, approximately one month after discovery, and is offering 12 months of complimentary credit monitoring through Cyberscout, a TransUnion company. The public sample notice does not itemize the specific categories of PHI involved and states there is no current indication that any information has been misused.
Because Cornerstone Care Center is a HIPAA-covered healthcare provider, the incident also implicates federal protections governing the security of protected health information. Whether the facility's pre-breach security practices met legal standards, and what categories of PHI were actually present in the affected account, are among the issues being evaluated.
What to do if you received a letter
Keep your notice letter
Do not discard it. Your letter contains the enrollment code for the complimentary Cyberscout credit-monitoring service and is important evidence if you decide to participate in a lawsuit.
Enroll in the free 12-month Cyberscout credit monitoring
Enroll in the Cyberscout (TransUnion) credit-monitoring service offered in your letter within 90 days of the date printed on the notice. Accepting this benefit does not waive your right to pursue legal action.
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. For healthcare cases, also watch for unfamiliar Explanation of Benefits letters, medical bills for services you did not receive, and prescriptions filled in your name.
Speak with a data breach attorney
Consultations with Dapeer Law are free and confidential. We'll review your notice, explain your options under HIPAA and state breach-notification laws, and advise whether you may be eligible to join a class action.
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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, medical-claim fraud, 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 Cornerstone Care Center to implement stronger data security and HIPAA compliance practices 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 Cornerstone Care Center. What should I do? +
Keep the letter, enroll in the free 12-month Cyberscout (TransUnion) credit monitoring within 90 days of the date printed on your notice, place a fraud alert or security freeze on your credit file, monitor your Explanation of Benefits letters and medical bills for services you did not receive, and contact a data breach attorney for a free consultation. Accepting credit monitoring does not waive your right to sue.
Am I eligible to join a class action against Cornerstone Care Center? +
If you received a May 2026 breach notice from Cornerstone Care Center, you are likely eligible for a free case evaluation. Eligibility depends on your state of residence, the categories of your data that were exposed, 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? +
Cornerstone Care Center's public sample notice states only that a limited amount of protected health information (PHI) kept in the ordinary course of business may have been accessed, and does not itemize the specific data elements involved. Because Cornerstone Care Center is a skilled nursing facility, the exposed PHI could include some combination of names, addresses, dates of birth, Social Security numbers, health-insurance information, and treatment or diagnosis details. Your individual notice letter should specify the categories of your data that were involved.
Did Cornerstone Care Center offer free credit monitoring? +
Yes. Cornerstone Care Center is providing 12 months of complimentary online credit-monitoring services through Cyberscout, a TransUnion company. Recipients have 90 days from the date printed on the letter to activate the services using the unique enrollment code in the notice. Enrollment is separate from, and does not waive, your right to pursue a claim.
How many people were affected by the Cornerstone Care Center breach? +
The total number of affected individuals was not disclosed in the sample notice filed with the California Attorney General, although the notice states that zero Rhode Island residents were impacted. 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 sample notice is publicly available through the California Attorney General's data breach list (linked in Sources below). If you received a letter but no longer have it, Dapeer Law can assist you in obtaining a copy during your free consultation.
Sources & references
- Official breach notice filing · California Attorney General, Cornerstone Care Center Sample Notice (PDF)
- Company · Sanger Skilled Care, LLC d/b/a Cornerstone Care Center (cornerstonecarecenter.com)
- 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.
