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Mact Health Board 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 MACT Health Board Inc. 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 MACT Health Board
MACT Health Board is a non-profit tribal healthcare provider serving communities across Mariposa, Amador, Alpine, Calaveras and Tuolumne counties in California’s Sierra Nevada region. Founded in 1969, the organization has expanded to include five medical clinics, one specialty clinic, one women’s health clinic, five dental clinics, two optometry clinics and one pharmacy.
The organization operates multiple clinics, offering a wide range of services including medical, dental, behavioral health, optometry, chiropractic, women’s health and pharmacy care. Employing about ninety people, the company aims to improve health outcomes for American Indian and Alaska Native populations by providing comprehensive, culturally sensitive healthcare services.
What Happened?
MACT Health Board Inc. experienced a data breach that disrupted its IT systems between Nov. 12, 2025, and Nov. 20, 2025. The breach was discovered after unauthorized access to files on the organization’s systems.
An investigation, assisted by third-party forensic experts and law enforcement, determined that sensitive information belonging to patients and employees was exposed.
The review of affected files was completed on Jan. 9, 2026. The types of information exposed include the following:
Information Exposed:
- Names
- Social Security numbers
- Medical information (including doctors, diagnoses, insurance information, medicines, test results, images, care and treatment)
- Driver’s license numbers
Your Rights and Next Steps
If you received a notification from MACT Health Board Inc. about this data breach, it means your personal information may have been compromised. There are several steps you can take to protect yourself and exercise your rights:
- Enroll in the free 12-month Experian IdentityWorks Credit 3B membership offered by MACT Health Board Inc. This service provides credit monitoring, identity restoration support and up to $1 million in identity theft insurance.
- Review your credit reports and account statements for any unauthorized activity. You are entitled to one free credit report every twelve months from each of the three major credit bureaus.
- Consider placing a fraud alert or a security freeze on your credit files. Fraud alerts warn potential creditors to verify your identity before extending credit, while a security freeze restricts access to your credit report entirely.
- If you notice suspicious activity, report it immediately to the Federal Trade Commission, your state attorney general’s office and local law enforcement. Keep a copy of any police report for your records.
- Stay vigilant for any signs of identity theft, such as unfamiliar accounts or credit inquiries.
Lawyers are ready to help individuals affected by this breach understand their legal options. If your information was exposed, you may have the right to seek compensation for any harm suffered as a result of the breach.
You May Be Entitled to Compensation
If you were affected by the MACT Health Board Inc. data breach, you may be eligible for compensation. Lawyers are actively investigating this incident and are ready to help you understand your rights and pursue a claim if appropriate.
To find out if you qualify and to join a potential lawsuit, complete the below form. Taking action now can help protect your rights and hold organizations accountable for safeguarding your sensitive information.
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