Stockton Cardiology Data Breach Lawsuit Investigation

Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Stockton Cardiology Medical Group data breach.

If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.

About Stockton Cardiology Medical Group

Stockton Cardiology Medical Group is an independent cardiology practice that serves the San Joaquin Valley in California.

The practice offers a wide range of cardiac care, from preventive checkups to advanced interventional procedures, and is known for its comprehensive approach to patient care.

What Happened?

On Dec. 15, 2025, Stockton Cardiology detected suspicious emails sent to several employees.

Although these emails were promptly deleted, an investigation later revealed that certain files maintained for business and patient care may have been accessed and removed by an unauthorized individual. By Jan. 17, 2026, it was discovered that some of these files had been publicly disclosed.

On Feb. 17, 2026, the hacking group GENESIS claimed responsibility for the attack, stating on a dark web posting that they had obtained 645GB of data, including healthcare, personal and financial information, as well as operational data from company fileservers.

The breach was reported to the California Attorney General on March 20, 2026.

Information Exposed:

• Patient names
• Mailing addresses
• Email addresses
• Billing records
• Limited medical information associated with services provided

You May Be Entitled to Compensation

If your personal or medical information was exposed in this breach, you may be entitled to compensation for damages such as time spent monitoring accounts, emotional distress or out-of-pocket losses. Lawyers are ready to help affected individuals understand their legal options and pursue claims for compensation.

To find out if you qualify to join a lawsuit related to this data breach, complete the below form. This is the first step toward protecting your rights and seeking compensation.

Sources

• California Attorney General
• Dark web